Hi! Recently I had a new Trane XL-16i heat pump installed. The installers seemed to be very good and came highly recommended so I believe that everything was installed correctly. One thing that seems to be really nice with this new unit is that it keeps the temperature right on what I have it set. With my old unit, my air would kick on when the temperature went a degree above what was set and would kick off when it got to the degree below. This new unit kicks the air on at 74 and turns it off at 74...I'm guessing that it probably kicks on just before it would hit 75 and kicks off just before it would go down to 73?
I have a 1.5 story house (approx. 2500 sq. feet). One problem that we've always had in this house (and I know that it's a problem with a lot of 1.5 and 2 story places with a single thermostat on the first floor) is that the upstairs is always considerably warmer (on the order of 10+ degrees on a hot summer day) than the downstairs. In the winter, the upstairs can be upwards of 5 degrees cooler. The installer recommended that we keep the fan on at all times to try to help keep the upstairs a bit cooler. This seems to be helping marginally but when the fan is on, the air output is fairly low. How much airflow should there be when just the fan is on? Right now, it's just that I can feel air coming out and have to listen very closely to even hear that any air is coming out. Is there any way to increase the output of the air from the fan? Does anyone have an idea how much electricity running the fan all of the time would take?
I know my installer said that one thing that may help the upstairs is to put b-board over the insulation in the knee walls since just having insulation directly exposed to the small attic space that is in a 1.5 story house makes the insulation much less effective. The space that can be insulated in the attic is well insulated and the airflow from the soffits to the ridge vent seems pretty good as long as there is some wind outside. Does anyone know if adding b-board will help out much? I have thought about trying an attic fan too but most places I've read seem to indicate that shouldn't be needed if you have a ridge vent for ventilation. Or would I be much better off adding a thermostat upstairs so that I have 2 different zones in my house?
Any help or advice would be greatly appreciated. Thanks!