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Formulas to calculate the required power output of a radiator for a room of a specific size. Do they exist?

Arran Cameron
Are there any recognised formulas to calculate the required power output of a radiator for a room of a specific size that also takes into account variables such as extra height, large areas of glass, insulation of walls etc? Good quality formulas devised by people who know about thermodynamics as opposed to plumber's rules of thumb passed down from the 1950s.


Numerous online radiator power outlet calculators exist but the formula behind them is not disclosed and the results for the same input variables vary from website to website.
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    Arran


    In a major project where life cycle costs and environmental footprint have been pored over by Chartered Engineers, benchmarked by BSRIA compared with ASHRAE data etc., I think that your claims are exaggerated, as they probably also are in the domestic domain. Where is the research?     

     

    It was my understanding that my Bosch refrigerators came of the same production line but had a different plug fitted. Have I been played for a fool? If so, is it the heat engine that is different or the insulation?  

     

    IET members, sectors and specialist interest groups etc., are involved in just about everything around electronics. I gather Marzipan Hats are selling well recently   wink

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    Arran


    In a major project where life cycle costs and environmental footprint have been pored over by Chartered Engineers, benchmarked by BSRIA compared with ASHRAE data etc., I think that your claims are exaggerated, as they probably also are in the domestic domain. Where is the research?     

     

    It was my understanding that my Bosch refrigerators came of the same production line but had a different plug fitted. Have I been played for a fool? If so, is it the heat engine that is different or the insulation?  

     

    IET members, sectors and specialist interest groups etc., are involved in just about everything around electronics. I gather Marzipan Hats are selling well recently   wink

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