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Posted By: JSHarrisOverall the house is a net energy exporter through the year, but in terms of cost (ignoring FIT subsidy) it still ends up paying for energy!
Posted By: JSHarrisI still need to do more work on this, but suspect that, for a house that's around PassivHaus standard it may well be possible to use warm air heating quite effectively. Doing this would certainly save a fair bit of money over having to fit UFH.
Posted By: JSHarrisI've found it quite interesting as a way of trying to get my head around which bits are more important than other bits.
Posted By: JSHarrisThe layout is such that if I feed the warm air into the living room, hall and bedrooms at near floor level...
Posted By: JSHarrisIf I over-size the ductwork then I can fairly easily alter the system to increase air flow if I find that it's required. This would mean adding an internal bypass to the MVHR to recirculate some of the heated internal air via a secondary fan but I'm hoping this shouldn't be needed.
...where a dwelling has a basement storey or a storey at a height of more than 4.5 mand is provided with a system of ducts that connect rooms and circulation spaces:...supply and return grilles should be not more than 450 mm above floor level...
Posted By: JSHarrishad me shuffling through the BR's for a few minutes!
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