Does anyone know a simple formula for calculating the heat output (in BTU/h or W/h) of a bog-standard central heating radiator (based on the area of its heating panel(s)?
Many thanks,
Al
- posted
11 years ago
Calculating the heat output of a central heating radiator
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- posted
11 years ago
Have a look on one of the radiator suppliers' websites? They list output against the various sizes.
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- posted
11 years ago
Measure it, and look up the specs of a s similar sized one. ;-)
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- posted
11 years ago
Indeed, but make sure that the one you look up is the same type of construction - of which there are many[1]. Also be aware that the heat output depends not only on dimensions and construction but also on delta-T - the difference between room temperature and the mean temperature (average of flow and return) of the radiator. If you run a radiator "cool" in order to maximise the efficiency of a condensing boiler, it will output a lot less heat that it would if run "hot".
[1] Single panel without fins, single panel with fins, double panel without fins, double panel with single fins, double panel with double fins - to name but a few.- Vote on answer
- posted
11 years ago
Indeed. I was pleasantly surprised having looked at a number recently (just about to set about the heating and water system in a big way), that most of the sites are quoting Delta Ts of 50 degrees now, and assuming condensing boiler friendly flow rates.
Some makers are even doing triples now... looked a tad fugly though and not in that old school "old school" rad kind of way ;-).