Throughout the year, we are all reminded about the importance of our air heating and cooling system. Air heating and air conditioning systems not only make the environment in our homes and businesses comfortable but also healthy by filtering out air-borne allergens. While air conditioners especially are only about a century old, we cannot imagine how life would be without them. Of course, if the air conditioner breaks down during the summer, we are rudely reminded of life without cool air in the home or business. Most air conditioning dealers will, for a modest price, do a checkup of your…