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Old Jan 13, 2010, 04:43 PM
Peter Parry
Peter Parry
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Re: Heating a workshop/garage

On Wed, 13 Jan 2010 10:48:38 +0000, Donwill
<Donwill.seesig@invalid.invalid> wrote:


>
>To minimise the risk of condensation on machines the temperature should
>be kept reasonably constant but that's expensive if you heat to a
>comfortable working temperature.


If you are contemplating electric heating then start by installing one
or more dehumidifiers. Firstly they (obviously) dry the air but
secondly they recover the latent heat of evaporation so are slightly
more efficient than a 100% efficient radiant heater (you get more heat
out than electric energy equivalent put in).

Another alternative which is much cheaper to run than resistive
heating is an inverter split unit air conditioner. This is an air
source heat pump with air drying. DIY fit versions are available.
Look for the coefficient of performance figure. In heat pump mode
these types of systems typically have a coefficient of performance
(CoP) of about 3. This means that a 3 KW air conditioner uses about 1
KW of power. Conversely a heat pump provides about 3 KW of heat while
using about 1 KW of power.