Part one of this series will cover the credits available in the first two (out of nine) sections... Energy (ENE) and Water (WAT). These two categories alone make up 45% of the total points available, so it’s really important to focus on them.
Earning the credits...
First off, the better you do in your SAP assessment, the more credits you get. Just passing Part L will get you nothing in the Emission Rates section, but a 25% reduction will get you three credits... on paper you can earn up to ten credits if you’re house has zero net CO2 emissions, but that’s a very rare spectacle. For Level 4 you must achieve at least three credits in this section.
Next is Fabric Energy Efficiency - This uses data from the SAP to specifically check the heat loss from the building fabric. There are a potential further nine credits available here. There are mandatory requirements here too, but only for Levels 5 and 6.
Up to two credits are available for installing display energy devices which monitor electric, gas and water use and cost in real time, and a further two are available if you install the best energy rated white goods on the market today.
If you are installing low or zero carbon technology you can get two credits by proving an overall 15% reduction in emissions – this can be shown in the SAP assessment.
Two quick wins are installing low energy external lighting with motion sensors – that’s two credits straight away... and installing a drying line for clothes – that’s another.
If there’s space for a secure cycle store you can gain two credits, and if you design the use to include a home office, you’ll gain another.
Part G Calculations
These are the heaviest weighted credits in the whole Code, but there are only six up for grabs!
Five of these are available directly from your Part G Water Efficiency Calculation. For Code Levels 3 and 4 you need to design your house to use less than 105 litres of water per person per day. This will get you three credits... you can get all five by dropping water use to 80 litres. This is mandatory for Levels 5 and 6.
Part two of our CSH Simple Summary series will cover the credits available in the Materials (MAT), Surface Water Run Off (SUR), Waste (WAS) and Pollution (POL) – these sections don’t score you large amounts of credits, but there are some mandatory elements you need to be aware of.