GBC Green Building (Calculator) G#38491

GBE Green Building Calculator U To Watts To CO2 A13 BRM 210520 PNG

GBC Green Building Calculator

GBE > Encyclopaedia > Files > Calculators > Whole Building Calculators > G#38491

GBC Green Building Calculator
About:

GBE Green Building Calculator Logotype Draft PNG



Introduction:

  • GBC Green Building Calculator
  • Was developed initially to help 5th year Post Graduate Student Architects to asses and compare their studio designs, and get them over the 50 mm thermal insulation threshold that text books still show.

    Whole Building, Elements, U Values, Areas, Temperatures differences, Heat loss, Element %, Fuel choice, CO2

      Whole Building, Elements, U Values, Areas, Temperatures differences, Heat loss, Element %, Fuel choice, CO2
  • To a man the part time students took it back to their offices and used it in the real world.
  • It is here in the GBE shop
  • https://GreenBuildingEncyclopaedia.uk/?p=11095
  • It proved challenging for the students but they persevered and succeeded.

GBC Green Building Calculator

  • During COVID-19 lockdown GBC decided to get it out and tidy up the inconsistencies caused by rushing week by week to create it.
  • GBC simplified many functions into their own pages and worksheets

 

GBE Green Building Calculator U To Watts To CO2 A13 BRM 210520 PNG

    GBC Green Building Calculator U To Watts To CO2 A13 BRM 210520 PNG
  • GBE have added more functionality with:
    • room by room calculator; work out size of radiators or insulate to meet a boiler size
GBE Green Building Calculator Room By Room Losses A13 BRM 250520 PNG

GBC Green Building Calculator Room By Room Losses A13 BRM 250520 PNG

    • Bill of materials, quantities, labour and costs.
  • GBE Green Building Calculator Bill of Materials Quants Costs Close Up A14 BRM 110620 PNGThe second whole building calculator for the same students was the GBE Embodied Energy, Embodied Carbon and Sequestered Carbon Calculator (EE EC SC) which is planned to merged into the first.

GBE Whole Building EE + EC + SC Calculator

    GBE Whole Building EE + EC + SC Calculator
  • The 2 files merged will allow us to do whole building assessments of U values, allow choice of materials and assessment the Life Cycle Assessment of the whole Building and experiment with alternative materials.
GBE Green Building Calculator Schedule Accommodation A13 BRM 250520 PNG

GBE Green Building Calculator Schedule Accommodation A13 BRM 250520 PNG

  • BrianSpecMan also joined an Interreg funded project to develop an LCA & EPD method and Tools, GBE intend to merge its functionality into GBC Green Building Calculator
  • CAPEM Compass is here
  • https://GreenBuildingEncyclopaedia.uk/?p=546
CAPEM Compass Home Page

CAPEM Compass Home Page

  • I was asked to advise a product designer to assist with specifications
  • On analysis of their video I insisted on doing a Psi calculation to check their U values
  • https://GreenBuildingEncyclopaedia.uk/?p=14582
  • GBE Calculator LoftZoneStoreFloorUValue Summary A05BRM100117

      GBE Calculator LoftZoneStoreFloorUValue Summary A05BRM100117
  • BrianSpecMan also did a Project with BRE on waste minimisation and recycled content and created GBE Waste Cost lite calculator I shall merge its functions into GBC Green Building Calculator eventually.
  • https://GreenBuildingEncyclopaedia.uk/?p=531

  • During Next week I will approach custodians of some datasets and tools to see if they will work with GBE to add on: to see if there will be a license cost to stick in the ‘overheads’ column.
  • GreenGauge Advanced Details (Thermal bridge & Psi values)
  • https://GreenBuildingEncyclopaedia.uk/?p=25033
  • GreenGauge Energy Consultancy Logo
  • ICE for (EE EC SC Database v3) (currently using 1.6)
  • ICE Database (Jargon Buster) G#1018 N#1037
ICE 2011 BSRIA Guide

ICE 2011 BSRIA Guide

  • During the next year GBE have 20 updates on the launch version to create or merge Including: 
  • Items mentioned above and:
  • Decrement Delay (overheating prevention)
    GBE Green Building Calculator Decrement Delay A13 BRM 250520 PNG

    GBC Green Building Calculator Decrement Delay A13 BRM 250520 PNG

 

  • The intention is to develop a low cost way into Environmental design and Specification that improves on  some aspects of BREEAM and Green Guide to Specification to avoid the greenwash and get real calculations for real buildings with real materials and real products.
  • In the mean time screenshots are being added to a page on GBE website.
  • https://GreenBuildingEncyclopaedia.uk/?p=38491 (this page)

Case Studies

Architectural Competition Entry

  • GBE supported an exStudent with a Metsa Timber Technology Competition Entry
  • Providing U value, Embodied Energy, Embodied Carbon and Sequestered carbon calculation for a proposed external cladding system and compared it with a 1960 residential tower made of Precast concrete cladding panels
Samael Coco UValues EE EC SC PNG

Samael Coco U Values EE EC SC PNG


Building Type Study

  • GBE will be very pleased to have the opportunity to carryout a case study of elemental assemblies and house types in due course.
  • This is now offered as a service
  • Enquiry template:

 


About:

  • The GBE Green Building Calculator ‘GBE GBC’ provides a low-cost Energy Performance and Cost analysis tool for new building designs, for those not engaging in PHPP planning tool, or SAP, SBEM, IES, etc. calculations.
  • This Microsoft Excel calculator was originally developed to permit Post Graduate Architecture students to analyse their own studio building projects.

 

  • Brian Murphy, Founder of Green Building Encyclopaedia (GBE) https://greenbuildingencyclopaedia.uk created the spreadsheet and he has continued to update and expand it.
  • The consistent results meant that different building shapes, methods of construction, materials choices and resultant energy demand and consumption could be easily compared.
  • The students all took the file to their offices and started applying them to their live projects.

For a Future:

  • With XR Extinction Rebellion, Greta Thunberg’s behaviour change campaign, Architects Declare, ACAN and many other groups and Government bodies declaring and becoming involved in environmental design in a bigger way, we have a chance to engage designers in more scrutiny of what they design.
  • So GBE have restarted development of a calculator that can be useful to enable many more to engage more robustly in meeting new targets as they become common place.
  • More over they will be able to understand why 50 mm of stone wool insulation, shown in the aging text books, is no longer enough, do their own U value calculation independently of manufacturers who will do them for free, if users pay for their insulation. (Whether it is appropriate or competent in that location in the construction)

Format:

  • GBE has developed this as an MS Excel calculator (so far) for a number of reasons:
  • Its open-book, not a black box, no hidden pages, all cells accessible to interrogate the calculations
  • It allows for user access, interrogation, greater understanding and learning opportunities.
  • Many will already have and may be familiar with (MS Excel) which enables a larger audience of users a quick way into building analysis.
  • It also allows users to customise, manipulate and develop bespoke versions for the user’s organisation
  • GBE will maintain a stakeholder group to encourage customisation to be shared to be considered for development into the core file for the greater good.
  • Having a large number of users some customising may help with feedback loops developing the Calculator with more features and stronger datasets
  • Other options considered but not adopted yet include Database, if data and version upkeep needs to be delivered and controlled more robustly we will consider this.

Quality Management

  • As a nod to QA procedures all actions are date stamped, and actions recorded in a revision table, if multiple users become involved then initials will be added against actions.  (demonstrated on this worksheet)

Scope at GBE launch:

  • Ÿ Whole Building and Room by Rooms Schedule of Accommodation, areas and volumes, hours of operation, design temperatures, inside and out
  • ŸŸRoom by room heat loss calculator to determine radiator or under floor heating requirements
  • ŸŸAnalysis of Form Factor and optimal U values to respond to them
  • ŸŸElements and secondary-elements are selected from ready-made lists to match the project, their dimensions added by user and their areas are automatically calculated.
  • Ÿ Since windows and doors come in a multitude of sized then a schedules allows their incorporation
  • ŸŸAllows users to compare and choose between Building Regulations Part L, LETI, AECB CarbonLite, Passivhaus, EnerPHit, EAMs, etc. including: U values, Airtightness, Form factors, Elevation window %.
  • Ÿ Automatically see what thickness of different k value insulation materials is needed to meet U values
  • Ÿ Allows the user to populate and assemble elements by choosing their combination of functional components and then choosing the materials for each component.
  • ŸŸCosts of insulation and windows are added here to help persuade architects and clients to spend money on insulation and higher performance windows and glazing
  • ŸŸAllows Architects to cost plan their projects with a Bill of materials, quantities, labour and costs based on building fabric only so far. (Non-external envelope elements and services to be developed)
  • Ÿ Started building a dataset of materials and products with performance and costs to add to and populate the calculator (Supplier and manufacturer collaboration needed to populate these further)
  • Ÿ Element Summary to compare calculated U values with selected or target U values
  • Ÿ Calculates energy losses from each element and secondary-elements to give total losses or demands
  • Ÿ Calculates each element and secondary elements total demands as a %s of the whole
  • Ÿ Allows comparisons to be made by the user to prompt reconsideration of earlier decisions
  • Ÿ To spend more money on insulation or better windows to reduce running costs

COVID-19 Lockdown Development

  • Due to the weekly time pressures during the initial creation the content was restricted.
  • Many of the original ambitions remained in separate calculators
  • So the plan is to continue development if demand shows it is useful or required
  • An Architect Client of GBE asked for a Retrofit Calculator for Victorian Terrace this has been started by adding more elements.
  • During Coronavirus Lockdown in between Lockdown Learning On-line CPD the opportunity arose to continue with this calculator’s development.

Ambitions:

  • Additions to developed:
  • Refurbishment Elemental Assemblies (started)
  • Embodied Energy, Embodied Carbon, Sequestered Carbon (merging in existent GBE Calculator)
  • Secondary Element Calculators: (Frame %, Ug, Uf, Uw, U values, G Values, datasets) (started)
  • Decrement Delay (using existent equation and data sets) (started)
  • Condensation Check (using existent dataset)
  • Product Datasets: k or U values, Thicknesses, Insulation, Glazing, Building fabric (started)
  • Cost planning: adding non-envelop elements and services to existent building fabric calculations
  • 892 readymade competent elemental assemblies (Using existent mothballed GreenSpecStudio datasets)
  • Create date:
  • 25/03/2018
  • Last edited date:
  • 02/0/2020

Worksheets:

  • Some of the worksheets are to some degree stand-alone, but most are also interlinked within this one spreadsheet so decisions made on earlier worksheets feed into later worksheets to carryout calculations.
  • Later worksheets require more information or decisions by the user to make use of the earlier decisions, in more calculations.
  • One sheets “UToWattsToCO2” require few inputs by the user, it assembles and calculates most things for you, you only need to choose the fuel source.
  • The user is required to assess the results and decide if they wish to reconsider earlier decisions and go back to adjust values and to instantaneously improve the overall results.

Welcome:

GBE Green Building Calculator Welcome A14 BRM 110620 PNGAbout:

GBE Green Building Calculator About A13 BRM 250520 PNG

    GBE Green Building Calculator About A13 BRM 250520 PNG
  • This page, is about the scope and ambitions of this Calculator

Development:

  • Described what the calculator is about and how parts interact and future development

Instructions:

  • GBE Green Building Calculator Instructions A14 BRM 110620 PNGLine by line or cell by cell instructions to edit the worksheets to make them project specific

Revisions:

  • Record of changes and levels of completion during development by GBE

Project revisions:

GBE Green Building Calculator Project Revisions A13 BRM 250520 PNG

GBE Green Building Calculator Project Revisions A13 BRM 250520 PNG

  • Keep your own records of application in projects for audit trails

Schedule Accommodation:

GBE Green Building Calculator Schedule Accommodation A13 BRM 250520 PNG

GBE Green Building Calculator Schedule Accommodation A13 BRM 250520 PNG

  • Whole Building’ and ‘Room by Room Schedule of Accommodation’,
GBE Green Building Calculator Room By Room Losses A13 BRM 250520 PNG

GBE Green Building Calculator Room By Room Losses A13 BRM 250520 PNG

  • Users add sizes, hours of operation, design temperatures, inside and out
  • It works out areas and volumes,
  • ‘Room by room heat loss’ calculator to determine radiator or under floor heating requirements
  • Or start with a boiler size and work out how much insulation is needed to ensure the boiler is enough

Form Factor:

GBE Green Building Calculator Form Factor A13 BRM 250520 PNG

GBE Green Building Calculator Form Factor A13 BRM 250520 PNG

  • A quick analysis of the building form factor and set target U values to respond to them.
  • To be added or developed:
  • Correlation between form factor and insulation thicknesses
  • Form Factor could be developed to adjust for dormers, bay windows, porches, conservatories, riel windows, colonnades, etc.

Building Elements Sizes and Areas:

GBE Green Building Calculator Building Elements A13 BRM 250520 PNG

    GBE Green Building Calculator Building Elements A13 BRM 250520 PNG
GBE Green Building Calculator Building Elements Areas A13 BRM 250520 PNG

GBE Green Building Calculator Building Elements Areas A13 BRM 250520 PNG

  • List of 29 building elements and 12 secondary-elements and their areas
  • The user identifies which are included in their project design and any of their respective dimensions and areas missing from the schedule of accommodation
  • To accommodate a multitude of secondary element sizes an additional schedule is included

U values Etc.:

GBE Green Building Calculator Compare Choose UValues A13 BRM 250520 PNG

GBE Green Building Calculator Compare Choose UValues A13 BRM 250520 PNG

  • Comparisons between Building Regulations (E, W, S, NI and others), Energy Standards, FEES, AECB carbonLite, Passivhaus, EnerPHit, EAMs, etc.
  • Including: U values, Airtightness, Form factors, Primary Energy, etc.
  • Allowing users to choose and apply chosen set of targets to projects.

Insulation: Material k to U Value Thicknesses

GBE Green Building Calculator Insulation kValue Thickness PNG

GBE Green Building Calculator Insulation kValue Thickness PNG

 

GBE Green Building Calculator Insulation kValue Thickness Left End PNG

    GBE Green Building Calculator Insulation kValue Thickness Left End PNG
  • Lists of insulation materials organised by material groups with best average and worst k values
  • Applying the chosen U values this provides an instant comparison of materials and thicknesses
  • To be developed:
  • more materials and more k values

Insulation: Materials to Decrement Delay

GBE Green Building Calculator Decrement Delay A13 BRM 250520 PNG

GBE Green Building Calculator Decrement Delay A13 BRM 250520 PNG

  • Includes the first stages of development of the Decrement Delay calculator (incomplete)

Legend & Terms:

GBE Green Building Calculator Legend A13 BRM 210520 PNG

GBE Green Building Calculator Legend A13 BRM 210520 PNG

  • Legend of cell colour codes, cell fills and Schedule of terms and insulation materials to help understanding
  • Not a functioning part of the calculator (incomplete)

Elements:  Assemblies of Components & U value

GBE Green Building Calculator Elements U values A13 BRM 210520 PNG

GBE Green Building Calculator Elements U values A13 BRM 210520 PNG

  • Detailed descriptions of 24 of 29 potential elements and 12 secondary-elements making up the external envelop of a building and includes their functional components
  • Allows the user to choose elements and assemble them by choosing their combination of functional components and then choosing the materials for each component.
  • Where possible a default size is added and where necessary the user adds insulation and other component thicknesses.
  • Using each materials k values and set resistances it calculates all of the R and U values automatically
  • Costs of insulation and windows are added here to help persuade architects and clients to spend money on insulation and higher performance windows and glazing
  • To be completed: 5 elements to be added

Elements: Bill of Materials Quantities Costs

GBE Green Building Calculator Elements B of MQTRC A13 BRM 210520 PNG

GBE Green Building Calculator Elements B of MQTRC A13 BRM 210520 PNG

GBE Green Building Calculator Bill of Materials Quants Costs Close Up A14 BRM 110620 PNG

  • To allow Architects to cost plan their projects a Bill of materials, quantities, labour and costs is added based on building fabric only so far.
  • To be added: Non-envelope items, Services

Resistances:

GBE Green Building Calculator Resistances A13 BRM 210520 PNG

GBE Green Building Calculator Resistances A13 BRM 210520 PNG

  • Is an information resource for default surface and cavity resistivity’s;
  • ‘Element’ obtains values from here

Conductivities:

GBE Green Building Calculator Conductivities A13 BRM 250520 PNG

GBE Green Building Calculator Conductivities A13 BRM 250520 PNG

  • Is an information resource for materials and their properties for use in Components of ‘Elements’
  • The user can copy information manually into Elements (Automated cell population to be implemented)
  • Its is to be developed as a look up table to automatically populate Component of ‘Elements’

Products:

GBE Green Building Calculator Products Properties A13 BRM 250520 PNG

GBE Green Building Calculator Products Properties A13 BRM 250520 PNG

  • Lists of Products with characteristics, intending to develop into a Look Up Table to populate ‘Elements”

Insulation Cost Thickness:

  • Is an information resource for materials, their properties and costs for use in Components of ‘Elements’
  • The user can obtain their own information or copy information manually
  • Its is being developed as a look up table to automatically populate Component of ‘Elements’

Secondary Elements Costs:

GBE Green Building Calculator Secondary Elements A13 BRM 250520 PNG

GBE Green Building Calculator Secondary Elements A13 BRM 250520 PNG

  • Is an information resource for secondary elements (Windows doors rooflights) and their properties for use in Components of ‘Elements’
  • The user can obtain their own or copy information manually
  • Its is to be developed as a look up table to automatically populate Component of ‘Elements’

Element Summery:

GBE Green Building Calculator Elements Summary A13 BRM 210520 PNG

GBE Green Building Calculator Elements Summary A13 BRM 210520 PNG

  • Summarises 24 of 29 Elements and 12 Secondary Elements calculated U values,
  • Compares with targeted U values, highlighting any shortfalls
  • More elements to be added

UToWattsToCO2:

GBE Green Building Calculator U To Watts To CO2 A13 BRM 210520 PNG

GBE Green Building Calculator U To Watts To CO2 A13 BRM 210520 PNG

  • Assembles elemental areas and U values to calculates energy losses from each element and total secondary elements to give total losses and each as a % of the whole so comparisons can be made by the user and gives a chance to reconsider earlier decisions
  • Particularly useful is the comparison of basement, walls, roofs, floors and all glazing

FuelCarbonFactor:

GBE Green Building Calculator Carbon In Fuel A13 210520 PNG

GBE Green Building Calculator Carbon In Fuel A13 210520 PNG

  • Is an information resource developed as a look up table used by ‘UToWattsToCO2’
  • Needs up to date factors

Cost Per m2:

GBE Green Building Calculator CostPerm2 Converter A13 BRM 250520 PNG

GBE Green Building Calculator CostPerm2 Converter A13 BRM 250520 PNG

  • This is a converter:
  • If the information provided by Manufacturers/Suppliers is not in £/m2
  • This will help with converting the information provided to the required format

Drop Down List:

GBE Green Building Calculator Drop Down Lists A14 BRM 110620 PNG

  • Used to populate cells with readymade answers to avoid typing, avoid errors and limit choices
  • Lists can be added to, as long as the last two cells remain at bottom of sets

Supplier Request Form:

GBE Green Building Calculator Supplier Request A13 BRM 250520 PNG

GBE Green Building Calculator Supplier Request A13 BRM 250520 PNG

  • Used to request information on products from manufacturers or suppliers

Condensation Check:

  • To be developed

EE EC SC Calculator:

GBE Whole Building EE + EC + SC Calculator

GBE Whole Building EE + EC + SC Calculator

  • To be developed: Embodied Energy Embodied Carbon Sequestered Carbon calculator

Ready Made Competent Elemental Assemblies

  • To be developed: 892 Competent Elemental assemblies ready to use

User Feedback

GBE Green Building Calculator User Feedback Form A14 BRM 110620 PNG

  • An opportunity for users to highlight any problems or opportunities for improvements

User Survey

GBE Green Building Calculator UserSurvey A14 BRM 110620 PNG

  • There are 11 planned stages of development, have we go the order right?
  • What are your ambitions and priorities?

Features & Benefits

Features Benefits
What it Means to Declarers Enables ‘Declarers’ to engage more robustly with Climate Emergency
What it Means to Declarers Enables engagement with RIBA Climate Challenge
What it Means to Declarers Enables Architectural competition entries to be supported by competent performance data
What it Means to Declarers Enables engagement with Architects Climate Action Network ambitions
What it Means to your Business opportunities Addressing Climate Emergency can become part of your ‘New Normal’
What it Means to your Business opportunities Enable users to offer ‘Deep-retrofit’ to their existing clients 
What it Means to your Business opportunities Enable you to offer ‘Deep-retrofit’ and attract a new Climate Emergency focussed customer base
What it Means to your Practice activities Gives users access to equivalent tools that most individuals cannot afford
What it Means to your Practice activities Facilitates behaviour change by providing data for comparison and justification of better long term choices
What it Means to your Practice activities Enables defence of good decisions in Value Engineering exercises
What it Means to your Practice activities Allows easy consideration and comparison of better than ‘Business as Usual’ and ‘Legal Minimum’ regulations
What it Means to your Practice activities Allows easy consideration and comparison of better PH, CL, LETI energy standards over regulations
What it Means to Students and Graduates Students and graduates can have new skills on CV that many Practices do not yet have
What it Means to Students and Graduates Enables graduates and young professionals to bring new services to Practice’s attention
What it Means to Students and Graduates Enable ‘Grey Hairs’ to keep up with induction graduate’s expectations
What it Means to One person and small practices They can become autonomous and do some consultancy services themselves
What it Means to One person and small practices Enables them to do much more then they could before
What it does not do It does not replace AECB CL & CLR or PHPP and EnerPHit but enables many to experience what they do to a building   
What it does not do Users wanting to do Passivhaus need to focus more on the thermal bridge and air tightness details, etc. and get formal training
What it will do once developed It will be closer to but still will not be equivalent to AECB CL & CLR or PHPP and EnerPHit
What it will do once developed And it does a lot of other things too
What it is and does How that helps you
Multi-functional Green Building Calculator Does what you want but thought you could never do yourself
Multi-functional Green Building Calculator Does what you want but thought you had to pay and arm and a leg for
Multi-functional Green Building Calculator Useful for Architects, Technicians/Technologies, Surveyors
Multi-functional Green Building Calculator Useful for Building Performance advisors, Energy Advisors, Energy Consultants, Carbon reduction consultants
Multi-functional Green Building Calculator Useful for Builders, Constructors, Contractors, Sub-contractors, for regulation compliance, cost or variation comparisons 
Multi-functional Green Building Calculator Useful to Self Builders to check the quote specifications fit the building targets before they buy 
Multi-functional Green Building Calculator Brings together many calculations in a single place all interlinked so one change filtres throughout 
Multi-functional Green Building Calculator All the parts are in place, correct format linked to correct data sources so no more searching your college knowledge 
Multi-functional Green Building Calculator Saves you time
Multi-functional Green Building Calculator Broader Service Offering to Clients is possible
Multi-functional Green Building Calculator More in-house skills
Multi-functional Green Building Calculator Less reliance upon external consultants
What it does How that helps you
Elemental Energy Analysis with Cost Data Analyse result of spending more money on more insulation and/or more expensive glazing
Energy and Carbon in Use  Instant Carbon in Use calculation
It was created for New build
It works for any building use Hours of operation and room working temperatures can be set

Version Development

(11 versions over 12 months or less)

Worksheets Scope of phased development Versions
About A description of what GBE Green Building Calculator is, how it started and how it has developed Launch Version 1.1
FeaturesBenefits What is does and how that helps users Launch Version 1.2
Development Aid memoir for development Launch Version 1.3
Phased Development Prices This page: What is included in the launch version of GBE Green Building Calculator and GBE’s suggested development order: Subject to user survey Launch Version 1.4
Instructions Read these if GBE Green Building Calculator is not intuitive (it probably won’t be if you have not done a U value calculation before) Launch Version 1.5
Revisions A record of updates to GBE Green Building Calculator to enable an audit trail through the development process Launch Version 1.6
Project Revisions Not part of GBE Green Building Calculator

For users record keeping on design projects

Launch Version 1.7
Whole Building Whole Building: The start of GBE Green Building Calculator

Input page: Sizes, Areas and Volumes, hours of operation, design temperatures, inside and out

Launch Version 1.8
Schedule of Accommodation Schedule of Accommodation Room by Rooms

Input page: more specific than whole building if required; Areas and volumes, hours of operation, design temperatures, inside and out

Launch Version 1.9
Room By Room Heat Losses Input and Output page:

Room by room heat loss calculator to determine Boiler size, radiator or underfloor heating requirements,

Developed to help designer to make the insulation thicknesses or window specifications to match a boiler capacity when it’s a tight fit

Launch Version 1.10
Form Factor Results page:

Analysis of Form Factor and optimal U values to respond to them

To help designers see the importance of compactness, or the consequence of fragmentation of the building volume, on the energy consumption

See Update 2.3 

Launch Version 1.11
Building Elements Input page: simple yes/no

Building Elements and secondary-elements are selected from readymade lists of 29 Elements and 12 Secondary Elements to match the scope of the project

Launch Version 1.12
Building Element Areas Input and output page:

Building Elements and secondary-elements: their dimensions are added by user and their areas are automatically calculated.

Launch Version 1.13
Multiple Size Building Element Areas Input and output page:

Since windows and doors come in a multitude of sized then a GBE Green Building Calculator schedules allows you to incorporate them all

Launch Version 1.14
U values Etc. Energy Targets Results page:

Allows the users to compare and choose between Building Regulations Part L, other national regulations or standards, LETI, AECB carbonLite, Passivhaus, EnerPHit, EAMs, etc.

including: U values, Airtightness, Form factors, Elevational window %.

Launch Version 1.15
Insulation Thicknesses Input and output table: Information Resource: Quick look up table

Users apply the chosen U value targets from the previous worksheet

GBE Green Building Calculator automatically displays the thickness of different k valued insulation materials needed to meet U values targeted in each element.

Launch Version 1.16
Decrement Delay Insulation Thickness Input and output page: (incomplete at launch)

Automatically see what thickness of different k valued insulation materials is needed to avoid overheating on summer

See Update 2.1

Launch Version 1.17

Version 3.1

Legend Information Resource:

A list of terms used in GBE Green Building Calculator with some explanation of their meaning in a tabulated format

Potential link to GBE Jargon Buster pages

Launch Version 1.18
Elements Input and output page: Yes/No then choose from drop down menu, followed by automatic cell population

Allows the user to populate and assemble elements by choosing their combination of functional components and then choosing the materials for each component.

Components are in the right sequence but it may needs some know-how to choose the right one (Update 3 will help with readymade assemblies)

Costs of insulation and windows are added here to help persuade architects and clients to spend money on insulation and higher performance windows and glazing.

Launch Version 1.19
Bill of Materials Quantities Costs Input and output page:

Allows user to cost plan their Building with a Bill of materials, quantities, labour and costs based on building fabric only so far.

It will be reliant upon users interrogating recent tender rates or building price books

Services are planned to be addressed in update 1.4-1.7 (unless users say otherwise)

Non-external envelope components are planned to be developed in Phase 5.4 (unless users want it sooner)

See Update 1.2 & 1.3

Launch Version 1.20
Resistances Information resource: An essential part of U value calculations

interrogated by GBE Green Building Calculator: Elements

Launch Version 1.21
Conductivities of Materials Information resource: An essential part of U value calculations

Started building a dataset of materials with performances to add to and populate GBE Green Building Calculator: Elements

Launch Version 1.22
Products Information resource: An essential part of U value calculations

Started building a dataset of products with performance and costs to add to and populate the GBE Green Building Calculator: Elements

Launch Version 1.23
Secondary Elements Materials Performance Costs  Information resource: An essential part of U value calculations

Started building a dataset of products with properties performance and costs to add to and populate the GBE Green Building Calculator: Elements

Launch Version 1.24
Element Summary Result page:

Element Summary compares calculated elemental U values with user chosen or target U values

Launch Version 1.25
U value to Watts to CO2 Results page:

GBE Green Building Calculator works out energy losses from each element and secondary-elements to give total losses or demands

GBE Green Building Calculator works out each element and secondary elements total demands as %s of the whole

Allows comparisons to be made by the user to prompt reconsideration of earlier decisions

E.g. To potentially spend more money on insulation or better windows to reduce running costs

Launch Version 1.26
In Use carbon Input and output page:

By choosing the fuel source the GBE Green Building Calculator works out the CO2 generated In use

Launch Version 1.27
Fuel Carbon Factor Information resource:

The information source for fuels carbon factors for the previous calculation

Needs regular updates from Defra

Launch Version 1.28
Cost per m2 This is a converter: not part of the GBE Green Building Calculator

If the information provided by Manufacturers/Suppliers is not in £/m2

GBE Green Building Calculator will help with converting the information provided to the required format for the calculator to function correctly

Launch Version 1.29
Drop Down List: Information resource:

Used to populate cells with readymade answers to avoid typing, avoid errors and limit choices

Lists can be added to, as long as the last two cells remain at bottom of sets

Launch Version 1.30
Supplier Request Form: Information Resource:

This is not part of the GBE Green Building Calculator function but for consistency and inter operability the layout of data donated needs to be consistent

This schedule may change from time to time to maintain consistency with newer functionality to enable auto populating of cells

Used to request information on products from manufacturers or suppliers to permit incorporation into datasets

Launch Version 1.31
Domestic Retrofit: Results page:

Develop missing parts: Refurbishment Elemental Assemblies (started)

Version 2.1
Building Labour Rates Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 2.2
Materials Rates Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 2.3
Services Scope Input & Output page:

Description of Systems and all component parts, pipe or cable lengths

Version 2.4
Services Rates Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 2.5
Services Labour Rates Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 2.6
Services Costs Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 2.7
Decrement Delay Calculator: Information Resource:

To be completed:  (using exiting equation and datasets) (started)

Version 3.1
Product Data Sets: To be developed: k or U values, Thicknesses, Insulation, Glazing, Building fabric (started)

Supplier and manufacturer collaboration needed to populate these further

Manufacturer donated information added for free, but checked by GBE first

Users will be encouraged to contribute any data for free update

Version 3.2
Form Factor Input and output page:

Development: Engage more methods of calculating

Incorporate: dormers, bays, oriel windows, porches, conservatories, lean-tos into calculations

Version 3.3
Building Section Coding Information Resource:

Building Section with Element, Sub Element and Junctions Coding (Sketched up principles so far)

Version 4.1
Material Applicability to Application (Appropriate and Competent) Information Resource:

Materials applicable to applications matrix with section Codes (PEF Schedule Exists: develop) 

Version 4.2
Building Elemental Assembly Code Numbers (Identification) Information Resource:

GBE BEACoN Building Element Assembly Code Numbers (using GBE 892 Competent Elemental Assembly Dataset)

Version 4.3
Readymade Competent Elemental Assemblies Information Resource:

To be developed: (using GBE 892 Competent Elemental Assembly Dataset)

Version 4.4
Readymade Competent Elemental Assemblies Information Resource:

To be expanded: (Using GBE 892 Competent Elemental Assembly Dataset + Others)

Version 4.5
Bespoke Elemental Assemblies Information Resource:

Develop Bespoke assemblies: (Invite users to contribute information for free upgrade)

Version 4.6
Specification Generator Information Resource: Output Generator: Results Page

GBS Green Building Specification Generator: (using GBE 892 Competent Elemental Assembly Dataset)

Version 4.7
Non-Domestic Retrofit: Results page:

Develop missing parts: Refurbishment Elemental Assemblies (started)

Version 5.1
Domestic New build: Results page:

Develop missing parts: Elemental Assemblies (started)

Version 5.2
Non-Domestic New build: Results page:

Develop missing parts: Elemental Assemblies (started)

Version 5.3
ICE database: Information Resource:

Update from 1.6 to 3.0 (Query a licence to pay?)

Version 6.1
EE EC SC Calculator: Input and Results page:

To be developed: from exiting GBE Embodied Energy Embodied Carbon Sequestered Carbon Calculator (EE EC SC)

Version 6.2
Bill of Materials Quantities Costs Results page:

Adding: non-envelop elements and services to existent building fabric calculations

Version 6.3
Non-External Envelope Components Input & Output page:

To engage with GBE Green Building EE EC SC Calculator once merged in

Version 6.4
Condensation Check: Input & Output page:

Might be auto completed having chosen materials in GBE Green Building Calculator: Elements

To be Created:  (using existing dataset and new equations)

Version 7.1
Thermal Bridge Calculator Input & Output page:

To be started:

GreenGauge to be approached to guide or carryout its develop?

Version 7.2
Secondary Element Calculator: Input & Output page:

To be developed: Frame %, Ug, Uf, Uw, U values, G Values, Psi values, datasets (started)

GreenGauge to be approached to guide or carryout its develop?

Query a Licence to pay?

Version 7.3
Thermal Mass Calculator: Input & Output page:

To be developed:

German Site to be approached

Query a licence to pay?

Version 7.4
GBE Green Building LCA Calculator  Input & Output page:

To be developed: (Based on EN 15804 Schedule)

Version 8.1
LCA Database Information Resource:

To be developed: Approach Renuables for dataset and to carryout or advise only?

May be a Licence to pay?

Version 8.2
Landscape Input & Output page:

Description of Elements and components with values

Version 9.1
Landscape Rates Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 9.2
Landscape Labour Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 9.3
Landscape Costs Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 9.4
Landscape Input & Output page:

Description of Elements and components with values

Version 10.1
Landscape Rates Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 10.2
Landscape Labour Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 10.3
Landscape Costs Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 10.4
Civils and Infrastructure Input & Output page:

Description of Elements and components with values

Version 11.1
Civils and Infrastructure Rates Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 11.2
Civils and Infrastructure labour Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 11.3
Civils and Infrastructure Information Resource:

Schedules of prices (invite users to contribute information for free upgrade)

Version 11.4

GBE Shop and Prices


© GBE GBC GBL NGS ASWS Brian Murphy aka BrianSpecMan **
2nd June 2020 – 1st October 2020

GBC Green Building Calculator
See Also:


GBE Shop


GBE Equations


GBE Datasets

  • Generic Materials (Dataset)
  • Glazing G k Ug Uf Uw values (Dataset)
  • Insulation Materials k values (Dataset)
  • Secondary Elements U values (Dataset)
  • Timber Species (DatasetG#1371 N#1351

GBE Calculator


Calculators By Others


GBE Proposal


GBE Jargon Buster

Initials, Abbreviations, Acronyms:

  • AECB
  • C
  • CO2
  • CO2e
  • D&DT
  • EC
  • EE
  • FF
  • GBE GBC
  • PHPP
  • SAP
  • SBEM
  • SC
  • TSB
 Words or phrases:
  • Building Embodied Carbon
  • Building Embodied Energy
  • Building Energy Demand
  • Building Fuel demand and Carbon generated
  • Building U Value
  • CAPEM Compass (No longer)
  • Carbon lite
  • Decrement Delay Decrement Factor (Jargon Buster) G#14043
  • Design & Decision Tools
  • Element area U Value
  • Elemental section U Value
  • Embodied Carbon (EC)
  • Embodied Energy (EE)
  • Embodied Water
  • Form Factor
  • Fuel Carbon
  • Fuel Factor
  • Green Building Calculator (GBC)
  • Green Building Encyclopaedia (GBE)
  • ICE Database (Jargon Buster) G#1018 N#1037
  • Innovate UK
  • Passivhaus
  • RetScreen
  • Scale Changer
  • Sequestered Carbon (SC)
  • Shared Earth Building Embodied Carbon
  • Thermal Bridge (Jargon Buster) G#9351
  • Thermal Break (Jargon Buster) G#9357
  • Technology Strategy Board (TSB)
  • U value
  • WasteCost®Lite (by GBE)
  • Water Calculator (by AECB)
  • Whole Building Calculator 2020 (by GBE)

GBE Links

  • AECB
  • LETI
  • WRAP
  • Association of Environment Conscious Building (AECB)
  • CarbonLite
  • Innovate UK
  • London Energy Transformation Initiative (LETI)
  • Passivhaus
  • RetScreen
  • Waste Resource Action Plan (WRAP)

© GBE GBC GBL NGS ASWS Brian Murphy aka BrianSpecMan **
2nd June 2020 – 1st October 2020

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