Ska rating revision summary to GPMs version Offices v 1.1 and Occupancy Stage release. 'Ska' ID Good practice measure Rank CHANGE/STATUS

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1 D01 Efficient lighting 5 Power density now set to 11w/m2. D02 Lighting controllability 6 Changes made to Guidance section. Other related measures are E01 Lighting controls. When installing controls consider the following Use of zoning so that lights closest to windows have separate controls Use of timing so lights default to off during daylight hours and end of office hours D03 Efficient HVAC 59 Changes made to Guidance section. Removed compact heat exchangers from criteria. Other related measures are E05 Energy efficient heat pumps, E06 HVAC zone controls, E11 Efficient boilers. Updated guidance. D04 Daylighting 69 No change D05 Efficient DHW 71 Exludes electric heaters with tank size <30litres Gas fired heaters on ETL, as before Electric heaters - based on standing heat loss D06 Demolition salvage plan 3 No change D07 Plan to minimise site waste 8 No change D08 Recyclable waste storage space 66 No change D09 SWMP 67 No change D10 Reduce masonry sent to landfill 43 No change D11 Reduce Timber sent to landfill 37 No change D12 Reduce partitions sent to landfill 41 Updated criteria note D13 Reduce ceilings sent to landfill 38 No change D14 Reduce carpets sent to landfill 32 No change D15 Reduce workstations and tables sent to landfill 16 No change D16 Reduce chairs sent to landfill 17 No change D17 Reduce storage units sent to landfill 28 No change D18 Reduce other loose furniture sent to landfill 27 No change

2 D19 Materials specification 14 Criteria: wording revised: to include 'recycled or recyclable content'. Reference to 'raw materials rather than virgin raw materials' deleted. Scoping: reference to 'datasheets M1-M23 and all materials included on the finishes schedule' added. D20 Timber 26 Scoping: wording revised to include 'in permanent insallations'. D21 Total recycled materials 79 No change D22 Low-GWP insulation 18 No change D23 Low-GWP refrigerants 19 No change D24 Refrigerant leak detection 60 No change D25 Limiting plant noise 86 No change D26 Reduce light pollution 101 Amend Occupancy stage statement example. D27 Refrigerant recovery 104 No change D28 Thermal comfort assessment 20 No change D29 Noise Level Standards 29 No change D30 Lighting design 30 No change D31 Daylight glare control New proposed Criteria of screens/blinds installation with a VLT of <10% 2. Updated Guidance section D32 Occupant HVAC control 53 Update scoping, occupancy stage assessment and guidance text. D33 Ventilation rates 76 No change D34 Low-VOC finishes 87 Review assessment stage text. Remove criteria 'touch up' note. D35 Printer-copier equipment area ventilation 88 No change D36 Cleaning of existing air supply ductwork 89 No change D37 Fine air filters 93 No change D38 DHW design 96 No change D39 Outside views 99 No change D40 CO 2 monitoring 105 No change D41 Cycle parking 21 Updated guidance D42 Cyclist Showers 55 No change D43 Cyclist lockers 97 No change

3 D44 CCS registration 22 No change D45 Building user guide 54 Updated guidance D46 Commissioning 61 Updated guidance D47 Seasonal commissioning 102 Updated guidance D48 Reduce Doors sent to landfill 42 new measure E01 Lighting controls 7 E02 Energy efficient lamps 12 E03 High frequency Lighting 23 no change E04 Energy efficient light fittings 35 Criteria updated as ETL changed. E05 Energy efficient heat pumps 13 no change E06 HVAC zone controls 36 no change E07 Pipework insulation 33 E08 Heat sub-metering (old name Tenancy sub-metering) 34 Major change: I think that the two sub-metering measures should be change to be electricty submetering and heat submetering, instead of end use and tenany. Whole datasheet has changed Re-named title, updated criteria. E09 Electricity sub-metering (old name End-use sub-metering) 45 E10 Component AMT 47 Changed the guidance section to refine the guidance on ETL E11 Efficient boilers 68 No change E12 Lower flush WCs 9 No change E13 Urinal controls 11 No change E14 Low flow taps 24 No change E15 Shut-off taps 25 No change E16 Flow controller 39 E17 water meter 46 No change E18 water management software 64 No change E19 Sanitary supply shut-off 73 No change Changed to 'Showers' measure - applies only to showers, flow rate <9 litres/min required

4 E20 Leakage detection devices 78 No change E21 Leakage pressure reducing valve controller 91 No change E22 IT Comms Room Energy 48 Consumption New measure E23 Existing Lower flush WCs 10 New measure E24 Energy efficient hand-dryers 70 New measure Criteria: '80% recycled content' replaced with 'based on the targets M01 Blockwork 49 shown in the table below' and table added showing minimum recycled content for new blocks. Updated the 'unfired' criteria to refer to clay M02 Bricks 83 Criteria: recycled content reduced from 80% to 30%. M03 Screed 84 Criteria: recycled content reduced from 80% to 50% and reference to 'criteria are presented in order of perceived highest sustainable impact' removed. M04 Insulation 72 Criteria: added: clarification of 'thermal and acoustic' insulation, are manufactured from at least 50% renewable materials, A or A+ rating from the BRE s Green Book Live service. M05 Hardwoods 15 Changes to Assessment and Handover notes only M06 Joinery 63 Changes to Assessment and Handover notes only M07 Raised flooring systems 40 Criteria: reference to BRE's Green Guide to Specification removed. M08 Partitions 51 Criteria: added: reference to A or A+ rating from the BRE s Green Book Live service, clarification that timber partitions (or those containing timber elements) must meet the requirements of criteria D20 and recycled content increased from 80% to 90% M09 Glazed partitions 56 Criteria: reference to A or A+ rating from the BRE s Green Book Live service added. M10 Suspended ceilings 50 Clarification added for ceiling tile/board and frames. Remove BRE criteria M11 Hard flooring 62 New criteria and guidance text M12 Soft flooring 52 Updated criteria M13 Hard wall covering 94 Updated criteria M14 Paints 57 Remove BRE criteria and guidance

5 M15 Polishes & varnishes 92 Remove BRE criteria and guidance M16 Wall covering 103 No change M17 Doors 81 Add clarification to include frame but not ironmongery which will fall under new GPM for Metals. All note that timber components to comply with D20 criteria. Remove BRE criteria. M18 Kitchen fittings 74 Updated criteria M19 Workstations and tables 75 Updated criteria M20 Chairs 82 Updated criteria M21 Storage units 90 Updated criteria M22 Other loose ancillary furniture items 80 Updated criteria M23 Window Treatments 98 Remove BRE criteria M24 Paper and towel dispensers 100 new measure P01 Reduce fit-out energy use 85 No change P03 Reduce C&D waste sent to landfill 44 No change P04 Increase recycled construction and 58 demolition waste No change P05 Less waste in use to landfill 65 Updated criteria, guidance and assessment P06 More waste in use recycled 77 Updated criteria, guidance and assessment P07 Reduce fit-out water use 95 Updated criteria, guidance and assessment P08 Reduce water in use 4 Updated criteria, guidance and assessment P09 Display Energy Certificate 106 New measure P10 Reduce Lighting energy in use 1 New measure P11 Reduce Small power energy in use 2 New measure Note: 'No change' is excluding the additions and alterations occuring in the Occupancy stage assessment sections.