With a programmable thermostat, you can program winter temperature at 65º at night, then back to 72º during the day. This simple program can save up to 15% on heating bills. If you need your furnace professionally serviced or inspected, call A.J. Perri Heating, Cooling, Plumbing & Electrical. We service and maintain all makes and models of air conditioners, furnaces and heat pumps.