Winter?s coming, there?s a chill in the air. We?re so busy with thoughts of the holidays and the delicious meals, but have you taken a moment to consider your furnace? When?s the last time you had a service or maintenance check? Don?t you think you should take care of it before you wind up needing home furnace repairs when it?s cold out? How Old Are Your Home and Heating? Since 2000, most homes built (91%) have a main space heating, ventilation, and air conditioning (HVAC) system with central ducts. Only half of homes built prior to 1940 do. Many could…