Air Leaks. Heating and cooling costs can be reduced by about a third just by finding and fixing air leaks. Gaps along a home’s foundation, around its doors, and surrounding its windows, can be sealed readily. Even holes around plumbing entering and exiting the home are potential air pathways that can be eliminated with caulking. Fireplaces in our Baldwin County area may not always have dampers, but even fireplaces with dampers need to be closed when not in use to minimize loss of heated or cooled air through the chimney. No damper? The home owner needs to find a way to close off the gap.
Insulation. Fifteen inches of insulation in the attic will give an R value of 30 to 38. R values for walls and for floors (for houses on piers) should be 13 and 19, respectively. Attic hatches are often overlooked, and insulation needs to be installed over them. Basically, insulating to a higher R value may not be cost-effective.
Air Conditioners and Heat Pumps. Air filters are key to minimizing utility bills. Consider changing those filters every time you get a utility bill. The units themselves should be serviced regularly. Thermostat settings of 68 degrees in the winter and 78 degrees in the summer are optimum settings for comfort, but moving the thermostat down a bit in winter and up a bit in summer will save the home owner about 3% per degree change in utility costs. Of course, a programmable thermostat can help even more by automatically setting the operation level of the air conditioner or heat pump lower in winter and higher in summer at times when the home is not occupied. Such a programmable thermostat is more cost effective than leaving the heating and cooling system to run at some constant setting.
Conserving Energy in “Real Cold” Weather. Heat pumps have an emergency heat setting. When the temperature gets below the low 20s, emergency heat will be triggered in the heat rods within the heat pump’s heat exchanger. The result will be high energy use and high cost. What many people do not recognize is that those same high energy rods are triggered if you adjust your thermostat more than a couple degrees up to heat up a place temporarily. To minimize triggering that automatic feature, the thermostat adjustment for heat needs to be adjusted a degree or two at a time in steps, rather than moving to an immediate high heat call from that thermostat.