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Posted by cdd on June 7, 2007, 12:47 am
>
>
> > I have just read an advertisement that is trying to sell
> > heat pumps-I don't think the brand really matters but
> > they say with 1KW input they can produce 5KW output.
> > Now I understand there is a portion of "free" heat shell
> > we say by the very nature of the system but an extra
> > 4KW seems abit much-
> > So my question would be is this the normal amount
> > expected ie- 1KW in--5KW out.
> > Now I have read the little fine print it says that the
> > input is 1KW (230V/4.3A) but the KW output is
> > in what they term as heat output.
> > Are these two terms the same?
>
> You need to look at the COP ratings for heating.
> COP will be lower at colder outdoor ambient temps.
>
> There will be a range like 2.0 - 4.5 with temps from 0 - 65 F
>
> Each unit is rated at 17 and 47 degrees. If you look into the tech data,
> they will list the complete set from 0 - 65 F
Thanks for the info-makes sense-quite suprising how much the ambiant
temputure changes the output of the unit.
cdd
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