Your Dallas air conditioning may be running overtime all summer long. Just the other side of your ceiling, the attic receives enormous amounts of radiant heat energy absorbed from the sun on a typical summer day. This heat accumulates to temperatures of nearly 150 degrees. Because heat energy is always in motion from a warmer zone to a cooler zone, attic heat radiates down through your ceiling and raises the temperature in the living spaces directly below. Rooms can be 10 degrees hotter due to the influence of attic heat, placing an extra load on your Dallas air conditioning and increasing cooling costs.
Most homes have nothing more than passive attic ventilation. Air flows into the attic through soffit vents at the eaves, then rises up and out through roof vents. In many cases, however, the ratio of soffit vent space to the size of the attic is not enough to provide sufficient natural circulation to keep up with the heat accumulation on a Texas summer day. A powered attic ventilator fan installed on your roof pulls more air in through the soffits and exhausts it at the peak of the roof. This bolsters passive ventilation to cut heat accumulation by as much as 50 degrees. Here are some of the benefits of attic ventilation:
- Lower attic heat allows your Dallas air conditioning to run less. Fewer “on” cycles of the compressor means energy savings to you of up to 25 percent.
- Excessive attic heat can be destructive to wooden structural components of the attic and roof, warping subroofing and causing shingles to buckle and leak. Proper ventilation helps preserve these materials.
- Where A/C cooling ducts are routed through the attic, extreme temperatures during summer can result in thermal loss from the ducts. This costs you money as cool conditioned air is warmed by exposure to the broiling attic. A cooler attic means a cooler home.
- Attic ventilation also removes moisture from the attic. Hot moist air accumulates during the daytime and condenses overnight. This condensation saturates insulation, warps wooden structural members and creates favorable conditions for mold growth. A cooler attic is also a drier attic.
In the DFW area, AirRite Air Conditioning offers cost-effective, professional HVAC sales and service. Ask us about taking some of the load off your Dallas air conditioning with an attic ventilator fan this summer.
Our goal is to help educate our customers in the Fort Worth and Arlington, Texas area about energy and home comfort issues (specific to HVAC systems). For more information about attic ventilation and other HVAC topics, download our free Home Comfort Resource guide.
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