A: We recommend checking it monthly to see how dirty it is and replacing it with a new disposable filter when required. A good reminder is to buy a new filter at the start of each new season. This does depend on the number of pets, if there is smoking in the home and the area around the house. If there is lots of construction in the area the filter may need to be replaced more often.
A: For the most part yes. Refer to the owners manual on how to replace the batteries in your thermostat.
A:
A: We have HRAI trained staff that can do a heat loss/gain calculation for your home. If we installed the heating equipment in your home when it was built these calculations have already been done in order for the builder to get a building permit. A bigger or higher ton unit is not always better, the house may cool down quickly but the moisture will not be removed and the unit will turn on and off all the time.