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Last seen: Aug 21, 2026
Most radiator manufacturers give a curve for output in the form P=kdeltaT^n where k is a constant, deltaT is the temp difference between radiator an...
@iantelescope Thanks for the replies. No conclusion can be drawn from the energy graph without also showing oat and it. Suggest to ignore for no...
It looks like B1, B2, Hall, Kitchen are bigger than needed for the design flow temperature so will work at lower FT. Living room*2 are smaller than n...
@iantelescope In summary this all looks good so far. I can offer the following initial observations on the graphs These are showing a sm...
Good, the graphs will take some looking at to see if there any insights. @derek-m may beat me to it. If it looks like room temperature is genuine...
There is some possibility for confusion here. If its the design schedule from the system designer then 'at a design temperature of 50' is likely to...
Unfortunately I think this goes beyond heating engineers, its a facet of practical trades in our country - we value celebrity and financial engineeri...
@editor Precisely so. We need an industry that has the capacity and delivers a quality product at a reasonable price. DiY-ers complement the i...
@johnmo @heacol @derek-m Perhaps it would help to distinguish expertise from experience. Expertise is valuable in most circumstances. Experience i...
@iantelescope Good. Why are you expecting the house to cool significantly? If I understand your system correctly your secondary (radiator) p...
PS. I should have added that the heat pump capacity you need may be up to 25% less if you have a very old (ie inefficient) boiler. In the range 6-9k...
On the basis that oil is 10kWh per litre, 1800 litres is about 18MWh. That very roughly translates to a 7-9kW heat pump. You will need to have a pro...
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