On Thursday 16 June 2005 07:26, Stephen Humphreys wrote:
> like most things commercial the BTU is seen as a reference.  I'm not sure
> that if I bought a boiler that was in kW I would try to break down the
> units and work out the laws of thermodynamics.
>
> Its interesting that with electric heaters I've always seen kw.  Thus if I
> was purchasing one for, say £19.99 and one was 1kW and the other 2kW then
> I'd buy the second one.
> Similarly if I were buying a boiler in BTU I'd apply the same price/figure
> equation.

What if you're comparing a boiler to an electric heater? Or if you want to 
know the efficiency of a heat pump, that is, how many watts of heat it can 
pump per watt of applied power?

phma
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