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GBE Compare Products G#968 N#989

By 10 August 2014October 9th, 2019Collaboration, GBE Compare, GBE PASS, Services

GBE > Collaborate > Service > PASS > G#968 N#989

GBE Compare Products

GBE Compare Products

GBE Compare: Group Comparison Product Accessory System Screening & Conclusions

GBE Compare: 

  • establishes the Key Performance Indicators KPIs, Environmental Performance Indicators EPIs and Social Performance Indicators SPIs for each product group.
  • places Energy & CO2 as the EPI and noise as the SPI e.g. for electric hand driers.
  • KPI Cost of use should equate to the energy per use, e.g. hand driers.
  • collects data on as many products as we can find easily; applies any calculations necessary to determine comparable data.
  • then sorts the results in each EPI, KPI and SPI to determine average or normal performance and determines which are above and below the average performance.
  • then compares individual products to determine where and how they are better or worse than the average or normal.
  • encourages manufacturers to bring their latest product data to improve the collected data.

GBE Compare:  Group Comparisons

GBE Compare: took manufacturer or reviewer declared data:

  • declared power in watts or kilowatts
  • declared duration in seconds
  • EPI determined power use
  • EPI declared power per number of uses or period of time
  • KPI if product is eligible for the ECA Enhanced Capital Allowance scheme
  • KPI if product is on the ETL Energy Technology List
  • Determine if those not on the list are ‘Or equivalent’
  • EPI declared CO2 outputs use
  • EPI declared CO2 outputs per number of uses or period of time
  • SPI manufacturer declared noise levels dBA at 1 m
  • SPI if product is on the Noise Abasement Society Quiet Mark list
  • Determine if those not on the list are ‘Or equivalent’.

Average or Normal Performance:

  • EPI Calculated power per use in kWh
  • EPI Declared power per use of duration in kWh
  • EPI Declared CO2 outputs per use: in kgCO2/kWh
  • EPI CO2 per 1000 uses or duration in kgCO2/kWh
  • SPI Declared noise pressure levels: in dBA at 1 m

GreenWash Alert:

  • In the absence of comparable data manufacturers can be optimistic in their marketing and sales talk.
  • There is some considerable greenwash going on about some below average products.
  • In the absence of knowledge specifiers can be fooled by the greenwash.


  • Facilities Management catalogues describe readily available low cost kit, but manufacturers improving their kit may not see seen on these lists.
  • Some manufacturers develop a model and sell it, other manufacturers create a model and continually develop and refine it; one is on their 8thgeneration of refinements; they are way ahead of the competition.
    • If you product is standing still, its effectively going backwards.
  • Enhanced Capital Allowance ECA threshold set too high: few are worse and fall below this threshold.
    • There is no Market Transformation Programme (MTP) going on in some product groups
    • few models are better than average in all these KPI, EPI & SPI.
  • GBE Compare: encourages manufacturers to bring new or better products to drive down energy and CO2 demands and improve efficiency to reduce noise.

Robust Specification:

  • When one manufacturer produces many products or many variants of one product, whose performance varies enormously from variant to variant, it is essential that the exact model name, reference prefix and reference suffix is in the contract specification.
  • NBS would argue that is enough, GBE argue that the performance characteristics, the reasons for choosing the product and the model, are also included, so there is a basis for checking deliveries on site and a basis for comparison in the event of substitution; all of this on site or at the point of substitution without reference to other documents.

Performance Standards:

“Unless workmanship and performance are defined as part of the Contract Documents

then any control over the end result becomes entirely speculative.”

Neil Pepperell MD© RIBA Indemnity Research Ltd.

Performance Certificates

“If … test certificates are claimed, make sure they are current and relate to the proposed product,

not another in the range”

Liability alert No.  17

A02 16th June 2013 changed here 11th May 2014

© GBE NGS ASWS Brian Murphy aka BrianSpecMan
5th June 2012 – 4th May 2016

GBE Compare Products:


Fig. 3 Example N13 Hand Drier Group Comparison


Fig. 4 Example N13 Hand Drier GBE COMPARE Group Comparison Conclusions

© GBE NGS ASWS Brian Murphy aka BrianSpecMan
5th June 2012 – 4th May 2016

GBE Compare Products
See Also:

GBE Compare Products:

GBE Compare Serve

  • N13 Sanitaryware
  • N13 Hand Driers
  • N13 WCs
  • N13 Urinals
  • N13 Taps
  • N13 Showers

GBE Schedules
GBE Products

  • L20 Doors
  • N13 Hand Driers
  • N13 Sanitaryware
    • WCs
    • Urinals
    • Taps
    • Showers
  • Translucent cladding
  • Windows

GBE Jargon Buster

  • BBA
  • BSI
  • BSI Kitemark
  • CO2
  • ECA
  • EPI
  • ETL
  • KPI
  • L10
  • MTP
  • N13
  • NAS
  • NBS
  • SPI
  • TWA
  • WTL
  • WWA
  • Energy Technology List (ETL)
  • Enhanced Capital Allowance (ECA)
  • Environmental Performance Indicators (EPI)
  • GreenWash
  • Kitemark
  • Key Performance Indicators (KPI)
  • L10 Windows
  • Market Transformation Programme (MTP)
  • N13 Sanitaryware
  • National Building Specification (NBS)
  • Noise Abatement Society (NAS)
  • Or Equivalent
  • GBE Civ
  • GBE Compare
  • GBE Serve
  • Proper Materials
  • Quiet Mark
  • Social Performance Indicators (SPI)
  • Timber Window Assurance (TWA)
  • Water Technology Product List (WTL)
  • Woof Windows Alliance (WWA)

GBE Checklist


  • Greening the Office
  • GreenWash
  • Market Transformation Programme (MTP)
  • L10 Windows

GBE Lectures

GBE 6 Core pages

GBE Suppliers

  • Company name

GBE Installers

  • Company names

GBE Systems

  • System Reference: __

GBE Products

  • Product Reference: _

GBE Accessories

  • Accessory Reference: _

GBE Manufacturer

  • Company name

GBE Materials

  • FSC Timber Suppliers

GBE Collaborative Services

© GBE NGS ASWS Brian Murphy aka BrianSpecMan
5th June 2012 – 4th May 2016

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