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re: prog. therm. and heat pump questions
12 dec 2005
rp wrote:
>
>russell coleman wrote:
>
>> i have a heat pump with aux heat for which i bought a programmable
>> thermostat. the rth7400d to be exact
>>
>> what is the recommendation on setting the temp difference between wake and
>> sleep times so that i am not going to make the system work to hard and not
>> get the energy savings that i bought the prog. thermostat for in the first
>> place?
switch off the strip heaters if any and turn off the heat at night and
set the thermostat timer ahead to make the house comfy when you get up.
>the programmable-stat isn't going to magically save you any money vs a
>non-programmable stat.
there's no magic: reducing the indoor-outdoor temp diff at night makes
less heat flow. that's newton's (1642-1727) law of cooling.
>iow, you may find yourself frequently overriding the schedule on your
>programmable stat,
or opening all the house windows in wintertime.
>...defeating its true purpose, which btw isn't what you claimed it was above.
how can he be wrong about his true purpose? :-)
>> ...that i bought the prog. thermostat for in the first place?
>... unless you aren't home, then the only way that you are going to save
>money with *any* stat is to live uncomfortably in your own house.
nonsense. he can be perfectly comfy sleeping under a quilt in a 40 f bedroom.
nick
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