Should I set back the thermostat at night or leave it the same temp all the time?Post created: 2013-03-21 Type of Equipment: Heat Pump Views: 120
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Just moved into a house in the North Carolina mountains with a heat pump, never had one before. Before, (in New York State) in the winter, I always turned the thermostat down to 63 at night, then back up to 68 during the day. A friend tells me it's better to set it at one temp and leave it there with a heat pump.
On 2013-03-21 JB wrote:
Your friend is probably right. The issue with heat pumps is that they are very efficient, but when the temperature drops an auxiliary heating source kicks on to generate more heat. These tend to be electric heaters, which are efficient in that 100 percent of the energy used goes to creating heat, but the cost of electricity and the amount used by the auxiliary can be more expensive than the cost to run the heat pump. Therefore, you want to minimize the use of the auxiliary.
So one thing that can happen when you set the heat down at night to 63 then 68 during the day the heat pump may call on the electric auxiliary to help quickly generate more heat. There are other situations where the auxiliary might kick on as well. So keep an eye on that AUX light on the thermostat.
To keep legal happy, let me just say that I am not an HVAC contractor, and you should never even look at your furnace without having a qualified, liability accepting HVAC contractor present. To keep sales happy, let me just say that you can find an HVAC contractor that's happy to take your money here: http://www.furnacecompare.com/perl/find_contractors.pl.