On Tue Nov 28 20:03:14 PST 2017 ev@lists.evdl.org said:
>I replaced a resistive space heater (about $120) in my two car
>garage/shop with a heat pump ($1300, Ebay) and it uses *one fifth* the
>energy. (SEER 21, 18000 BTU, heating and A/C) Paid for itself in a less
>than two years of operation. (Higher SEER rated heat pumps cost
>considerably more that lower SEER rated units. They cut fewer corners so
>you must pay for that.)
>SEER Wikipedia link:
>https://en.wikipedia.org/wiki/Seasonal_energy_efficiency_ratio

I've been tempted by those for my shop office - but you do have to hire a 
refrigeration guy to do the coolant.


--

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