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Week 3. SAP Rating failure, building works grind to a halt.
Builders are off site. 10 days ahead of initial schedule, ground works in and already started on the walls, but issues regarding the SAP Rating for the EPC.
The proposed structure cannot pass the SAP Rating for a new build based on the 2009 SAP Rating calculation. Initial plan was to put in electric but after a review with the SAP chap, we decided to go with oil implement oil, same as the property as next door. There is no gas on the street.
The chap comes back and says the property will fail on oil & proposes a convulted approach with electric stating that it was assumed water heating was on demand.
I don't believe the rating and my calculations show that oil gives a higher rating, so I do some more research and tell the guy I believe oil to be better. After reviewing the calculations I am indeed correct, oil makes the property more efficient, cheaper to run and less CO2 emissions. It's better. But it still fails. Turns out that if you use oil your target efficiency rating is more stringent than the electric. So the CO2 emissions are 30% less but the target is also 35% more if you use oil, so it's a fail. So basically I have to put in a more inefficient heating than a better one, pump out more CO2 to get a pass. Stupid.
I then challenge the water on demand comment on the recommendation. So how do I get hot water on demand if I have no cylinder I ask. Well, you can heat it when it comes out of the kitchen tap. Ok, what about the bath I ask? Well you, errr, oh! I need to add a cyclinder in. And so he does, and then he fails it.
So net, net. Builders have left the site & as of right now I cannot pass SAP.
So now having to work out adding in Heat pumps or solar panels to meet SAP.
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