Energy Vanguard Attic Fans

Gable fans fit into the gable vent and can be set to operate only within a preset temperature range.

Energy vanguard attic fans. After attic fan installation ac still off during day. Designing high performance heating ventilating air conditioning systems. Attic ventilation fans also tend to be quite energy efficient in terms of their own operation. The latest from the energy vanguard blog.

Teaching building science to professionals and homeowners. In fact the home power article states that a typical 250 watt fan would use 180 kwh per month if run continuously. Subscribe to the energy vanguard blog and. The energy vanguard blog qualifies as best in class in the home performance industry.

Many are solar powered and require no other wiring so they don t cause any additional charges on your electricity bill at all. Yes using fans to put positive pressure in the house would eliminate pulling conditioned air into the attic but if the ceiling has leaks you ve now turned the problem from exfiltration to infiltration and are pushing hot attic air into the house there s also still the problem of using all that power for something that s not necessary. Posted by allison bailes on september 10 2020. The problem is solar power attic fans are basically worthless as far as real cfm ratings go.

An attic that s brought inside the building enclosure is a beautiful thing. Energy vanguard s mission is to turn houses into high performance homes. The attic fan kept my house cooler by 8f compared to pre fan installation days. During workdays would leave air conditioner off when leaving in the morning.

This was observed on numerous days following the installation. However as a very old builder 70 years i have known cases where roof mounted attic fans have helped tremendously where the roof is a full hip and the ratio of ridge vents to soffit vents was way out of whack. This is most often done with spray polyurethane foam spf insulation either open cell or closed cell. We closed off eliminated the ridge vents and installed powered vents on thermostats.

Helping home energy raters succeed. Energy vanguard llc 533 west howard avenue suite e decatur ga 30030. Subscribe to the energy vanguard blog and newsletter. We do this by.

Attic power ventilators are simply not worth the cost and effort. As joe said if the ceiling is perfectly air. David butler optimal building systems. A standard a c powered fan using 400w to get 1200cfm is only 3cfm per watt.

Here in the southeastern us open cell is most often the spray foam of choice. Understanding manual j occupant loads. Sources such as the billings gazette energy vanguard and home power all have articles that essentially say the same thing. Does anybody actually believe that a 20 watt motor can move 800cfm of air blowing into a solid dome.