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Electric heating scores better under higher levels of code

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Peter Warm, Neil May and Bob Lowe have reported a number of peverse results under CSH. Pehpas the worse, it seems,
at code 4 CSH, a developer can build a less insulated shell if he adopts Electric on peak heating!!
Why is this?
Well from discussions with Bob Lowe UCL it seems that the problem lies
with the Fuel factor used to calculate the TER. This was set to allow electric heating to small flats to still pass the building regulations, ( set at 1.47) but this was intended to be phased out (or converge to a value of 1) as time went on.
Maybe the solution is to simply say that the CSH levels from 3 above have to assume convergence, ie that all fuels were treated solely on their carbon emission merits, rather than what is presently acceptable to the market. This is a small change in
the software, and can easily be carried out manually in the meantime by Energy professionals.
How can we raise this problem in a way that creates minimum havoc, and yet swiftly gets developers to take on a new TER calculation for the higher CSH levels?
08 Nov 2007 1:58 pm
Simon Corbey, Good Homes Alliance

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Easier to fix than the % improvement issue
I agree this is an oversight and can be fixed as Bob and Peter suggest.

The % improvement anomaly that Peter also identified is in my opinion more fundamental and hard to fix without rethinking the Code.

15 Nov 2007 8:17 am
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