Energy Vanguard Attic Fans

Energy vanguard s mission is to turn houses into high performance homes.

Energy vanguard attic fans.

As joe said if the ceiling is perfectly air. 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. Helping home energy raters succeed. David butler optimal building systems.

Attic power ventilators are simply not worth the cost and effort. Understanding manual j occupant loads. This is most often done with spray polyurethane foam spf insulation either open cell or closed cell. Temp 84f at 5pm.

This was observed on numerous days following the installation. Subscribe to the energy vanguard blog and newsletter. Subscribe to the energy vanguard blog and. We do this by.

After attic fan installation ac still off during day. 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. The energy vanguard blog qualifies as best in class in the home performance industry. They seem to be about the only people that are getting 40cfm per watt.

Attic ventilation fans also tend to be quite energy efficient in terms of their own operation. Posted by allison bailes on september 10 2020. Gable fans fit into the gable vent and can be set to operate only within a preset temperature range. Teaching building science to professionals and homeowners.

Designing high performance heating ventilating air conditioning systems. The problem is solar power attic fans are basically worthless as far as real cfm ratings go. 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.

The attic fan kept my house cooler by 8f compared to pre fan installation days. A standard a c powered fan using 400w to get 1200cfm is only 3cfm per watt. Temp 92 f at 5pm. Energy vanguard llc 533 west howard avenue suite e decatur ga 30030.

Here in the southeastern us open cell is most often the spray foam of choice. The latest from the energy vanguard blog. Many are solar powered and require no other wiring so they don t cause any additional charges on your electricity bill at all. An attic that s brought inside the building enclosure is a beautiful thing.