heatTo lower cooling costs and increase the efficiency of your home’s air conditioning, it is essential to limit the flow of heat energy into your home. Heat gain occurs by conduction via the external surfaces of your home, and outside air infiltration; but much of this heat gain can be reduced or prevented.


Windows, patio doors and other exterior glass surfaces can account for a lot of heat gain in your home. To block the sun, add outdoor shade from awnings and trees. Inside, use curtains or install window film, tint or blinds with a low shading coefficient and keep them closed during the day.


Having the right amount of properly installed insulation in the exterior walls and attic can help block heat transfer through structural components. R-values depict the level of insulation needed based on geography and climate.

Air Sealing

Leaks in the building envelope also account for heat flow into a home. To curb this, use caulk, weatherstripping and expandable foam spray to seal gaps and cracks around windows, doors and any penetrations through the shell. Seal and insulate the attic access hatch, and tightly close the fireplace damper too.

Household Activity

Appliances, electronics, lighting, body heat and other internal sources also account for more heat gain in the average home than many realize. Switch to CFL or LED light bulbs and limit or find alternatives to heat-generating activities during the day. Cooking and running the dishwasher for example, generate a lot of heat and require your AC to use more energy to cool the space to a satisfactory level. Prepare meals that require little or no cooking time, and do laundry at night or in the morning when it is cooler.

Contact Gentry Heating Inc. at 828-581-4045 for more solutions for reducing heat gain and improving energy efficiency. We have been providing quality service to the Asheville area for more than fifty years.

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