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Posted by jamesgangnc on December 4, 2007, 5:27 pm
You can do that if you want but what they are trying to tell you is that the
heat that the heat pump is still contributing to the whole mix is still
cheaper btus than the resistance heat, pretty far down the outdoor temp
scale. In other words you take the heat pump out of the equation and you
will have to make up the portion of the heat that it was generating with
resistive heat.
Resistance heat is usually the most expensive btus there is unless you're
getting a real deal on electricity.
Yes, it would be fairly simple to add an outdoor thermostat to turn off the
outside unit below a set temp. If you don't understand it all well enough
to figure out how to do it then you probably should get a pro to do it.
show/hide quoted text
>> The heat pump will be cheaper heat that the resistance heat just about
>> all the time. Natural gas heat becomes cheaper sooner. Get a natural
>> gas backup if you really want to save when it gets real cold. And they
>> will set it up so it completely cuts over based on an outside temp.
> I understand what you are saying...but the problem isn't what is cheaper
> to use to heat...the problem is the heat pump still running when it no
> longer can bring the home to the desired temperature because when it runs
> below a certain outdoor temp the indoor temp decreases when it runs.
> I'll just need to pony up the money for an outdoor sensor and a stat that
> will lock out the heat pump when it no longer can provide heat that
> contributes to a rising indoor air temp.
>
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> the time. Natural gas heat becomes cheaper sooner. Get a natural gas
> backup if you really want to save when it gets real cold. And they will
> set it up so it completely cuts over based on an outside temp.