I'm new to this forum and this is my first post.
I have a new house and I acted as the general contractor during the build. We moved in in June of 2011. I decided to have a Luxaire Acclimate 2 stage heat pump and variable speed air handler installed. The reason I decided on the Luxaire unit was due to the fact that the guy selling the unit was very competent. He sized the unit to a 4 ton. I'm heating approx. 4650 sq ft with the heat pump, have 9 foot ceilings on the main floor, cathedrial ceilings in both my sunroom and master bedroom. I have in floor electric heating in all my tiled areas, which is maybe 40% of my total floor area of the main floor and upper floor. We also have three propane fireplaces installed as well.
My issue is that my aux. heat, which is 15kw, is cutting in way too often. It's consuming between 100-150kwh per day. I have an energy meter installed on my air handler/aux heater. I have spoken to the guy numerious times, and he has come back and installed a switch so I could turn off 10kw of heat. The problem is that the house cools off too much and even with the 5kw of heat going so now I leave it on.
He says he has done a heat lose calc and come up with 44,000 btu.
I live just outside of St. John's, Newfoundland, Canada. The temperature doesn't get too cold. The past few nights it has gotten down to 14f, but last night it was 25 and it was still using the full 15 kw of heat.
I've had my infloor turn off for a while to see if the heat pump could keep up and it can't so I've turned my in floor back on and it's not really helping.
When the guy's installed the system they installed a couple of remote sensors, one in my living room and one up stairs. We were finding the up stairs really cold so the guy came back and turned the sensor on upstairs. So now the termostat is reading that sensor. Were still finding the upstairs cooler than the main floor so we have been closing the grills on the main to try and force more air to the upper level. Now the guy is insisting on coming back to install manual dampers in the basement to close off the main floor ducts. I think it's a waste of time considering the grills are almost closed.
Could someone please give me your opinion on why my aux heat is kicking in so much? Is it an undersized heat pump or a balancing issue?