Quote:
Originally Posted by Topspinmo
I find my house very well insulated. But, depends on how big or open your house is IMO. IMO you should set the thermostat during the cold weather and leave it. IMO if you let the house temp. get to low and turn the heat on it just takes long time to bring the house up to steady comfortable temp. So IMO savings may not be that much.
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This is very true. As the temperature differential between indoors and outdoors gets larger....lowering the thermostat merely changes the the set point the system will continue to run/cycle to achieve.
Also regarding the efficiency of a heat pump. The lower the outside temperature gets below the low 30s the less efficient it becomes. A heat pump collects heat from the exterior surrounding ambient environment. The lower the temperature the less heat the longer the unit needs to run. So on those less tha 30 degree mornings it matters little what your choice of indoor temperature, the unit is going to run a long long time to satisfy the setpoint....whether 62 (or lower) or 72 (or higher)!!!!
It can helpful to have a heat pump on the side of the house where the sun comes up. And there is a case for it being on the side where the sun goes down....depending when you are home the most!