Energy Vanguard Attic Fans

Does anybody actually believe that a 20 watt motor can move 800cfm of air blowing into a solid dome.

Energy vanguard attic fans.

Understanding manual j occupant loads. 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. We closed off eliminated the ridge vents and installed powered vents on thermostats. The energy vanguard blog qualifies as best in class in the home performance industry.

A standard a c powered fan using 400w to get 1200cfm is only 3cfm per watt. They seem to be about the only people that are getting 40cfm per watt. Posted by allison bailes on september 10 2020. Temp 84f at 5pm.

Here in the southeastern us open cell is most often the spray foam of choice. Teaching building science to professionals and homeowners. Subscribe to the energy vanguard blog and newsletter. Many are solar powered and require no other wiring so they don t cause any additional charges on your electricity bill at all.

During workdays would leave air conditioner off when leaving in the morning. Energy vanguard s mission is to turn houses into high performance homes. Helping home energy raters succeed. David butler optimal building systems.

This was observed on numerous days following the installation. The latest from the energy vanguard blog. Sources such as the billings gazette energy vanguard and home power all have articles that essentially say the same thing. Temp 92 f at 5pm.

After attic fan installation ac still off during day. An attic that s brought inside the building enclosure is a beautiful thing. Gable fans fit into the gable vent and can be set to operate only within a preset temperature range. We do this by.

Designing high performance heating ventilating air conditioning systems. Attic power ventilators are simply not worth the cost and effort. 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. Subscribe to the energy vanguard blog and.

As joe said if the ceiling is perfectly air. This is most often done with spray polyurethane foam spf insulation either open cell or closed cell. In fact the home power article states that a typical 250 watt fan would use 180 kwh per month if run continuously. Energy vanguard llc 533 west howard avenue suite e decatur ga 30030.