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16 COMMENT


COUNTING DOWN TO SAP10


Harry Hinchliffe is energy consultant and BREEAM assessor at C80 Solutions


With a return to normality comes a realisation that a new Standard Assessement Procedure method for assessing houses’ energy use is imminent. Harry Hinchliffe of C80 Solutions outlines the impact that SAP10 will have.


aving faced unprecedented challenges over the past year, it has been easy for the construction industry to overlook other issues which were on the sector’s radar before the pandemic hit.


H


One such issue is an expected (and many say overdue) overhaul of the Standard Assessment Procedure (SAP) for assessing dwellings on their energy efficiency credentials, with SAP 10 replacing the increasingly outdated SAP 2012 methodology.


Current estimates expect SAP 10 to come into play in June 2022. The official arrival could be delayed, but it’s also entirely possible that it could be brought forward.


CHANGES The most significant change is a reduction in


THE MOST SIGNIFICANT CHANGE IS A REDUCTION IN THE CO2 EMISSION FACTOR GIVEN TO ELECTRICITY, REFLECTING A MUCH GREENER NATIONAL GRID


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the CO2 emission factor for electricity, decreasing from 0.519 kgCO2/kWh to 0.233 kg CO2/kWh, reflecting a much greener national


grid which increasingly benefits


from renewable energy technologies. This will make it easier to achieve compliance using electric heating. With plans also in place to prohibit gas boilers in new build homes by 2025, many developers are likely to turn to heat pumps, electric panel heaters and electric underfloor heating as their primary heat sources. There could also be an increase in the use of electric boilers with an indirect cylinder for hot water. Electricity generated by photovoltaic (PV) panels is factored into SAP 2012’s calculations for a flat even when there is no direct connection to the property, causing a misrepresentation in the many apartment buildings where only one connection exists, to a landlord’s supply. SAP 10’s formula only factors in PV supply if the apartment is directly connected, with clear implications for developments that need to meet


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