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Tricky

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  1. Thanks for the comments. The 100mm celotex insulation was installed last week so no option to change now. Heat load with a internal temp of 22C and external of 0C is less than 1.8 Kw/hr I have also found this unit which has an inverter drive and a remote controller Ebay 295373873999 Would seem that controller would offer better control of living area temperature as it has a timer function. Im sizing the radiators on a water temperature of 45C.
  2. hI Im a new member and looking for advice on my new build granny annex for my wife and me in our later years and family visitors till then. The garden house is under construction now by me with help from a self employed builder. Its 2 bedrooms with overall dimensions of 15m x 6m and constructed with 63 x 38 cls framework and 100 thk Celotex bonded in with foam. The heating system I have in mind is a ASHP Ebay 354341730323. 5Kw with the water temperature set to approx 45C The hot water tank would be an unvented indirect cylinder approx 200l and would be on whenever the heat pump is on. There are 2 showers each with thermostatic valves set to 38C. The room heating would be radiators each with thermostat control. A buffer tank using an unvented direct cylinder again of about 200l would be incorporated. The buffer would also be on all the time. What do you think? Perspective Views 08-09-2022.pdf
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