Frequently Asked Heating & Air Questions
All manufactures recommend you change filters monthly. However, if you have a thick filter you may not need to change it as often.
NO. they create too much restriction to the air flow and may damage your system, If you want better filtration purchase the pleated filters.
There is no clear cut answer here. It depends on how old your unit is and how efficient it is. Units produced from about 1985 on are probably going to work just fine to below zero weather conditions. Trane does not recommend turning their units off anytime. By our calculations, they still produce more heat than they consume in electricity to well below zero.
BTU stands for British Thermal Unit and by definition is the amount of energy it takes to change one pound of water one degree. It is a measure of heat content of an appliance. The more BTUs the higher the available heat. Btu’s are commonly used to give a rating of size to many different appliances including furnaces, air conditioners, barbeque grills, fireplaces, etc.
When you are looking at appliances, BTUs are important, because they tell us how much heat is available for our use. Low BTUs in grills for instance, means poor cooking performance. Some grills have all the flash but no real cooking ability which leads to our dissatisfaction. Low BTUs in fireplaces means small flames. Small flames mean low heat output and low romance factor. BTUs in some appliances must be derated by the efficiency of the appliance. For example, in a furnace that is 92% efficient you only get 92% of the heat produced by that appliance. That’s why having the furnace and air conditioner properly sized is so important. No guessing allowed! If your furnace is too small you’ll be cold and if its to big you’ll be hot when its on and cold when its off. Cooling units won’t keep up if they are too small or will not do proper humidity control if they are too big. You want it cool and dry, not cold and clammy.