In Chicago land, furnaces run much longer than our cars in winter. Lately, they have been working extra hours with the cold temperatures. Don’t forget to take care of your furnace with a preventative maintenance check. Most of the time an early season check is better but not doing it at all is not a good option. There is still time. The same can be said for your AC. Today’s HVAC units are much more efficient that in years past. In order to keeping them running well, a preventative maintenance check annually will help keep your utility bills down and lower breakdowns.