Attic soffit vents, under the roof eaves and overhangs, are generally recognized as the best type of passive attic ventilation. They allow the attic to "breathe" with little risk of leaks and wind damage risks. In some cases, wind driven cross flow of air through the soffit vents is all the ventilation the attic needs. If it isn't enough, Solar Powered Soffit Fans are the best type of powered attic ventilation, using the same soffit vents and the sun to naturally ventilate the attic. Solar Powered Soffit Fans blow fresh air IN horizontally across the bottom of the attic, just above the ceiling, where it matters the most. Hot air in the attic is cooled, displaced, and forced OUT of the other passive attic vents, reducing the attic temperature and moisture. Some advantages include-
CSF Solar Crawl Space Fans exhaust crawl space moisture and odors, using existing foundation vents. Bad air is gently and evenly pulled out of the crawl space through a foundation vent and replaced by fresh air entering through the other foundation vents.
We deliberately make CSF fans as exhaust fans so that there is no chance to push “bad” air from the crawlspace into the living areas above. We also deliberately make them smaller, lower power fans so that there is no chance of pulling air out of the living area, which could also dangerously back draft furnaces, fired water heaters, kitchen vents, bathroom vents, and other exhaust ducts. If more airflow is needed, please contact us at firstname.lastname@example.org about a specific custom CSF arrangement for the specific building. We make custom synchronized push-pull (supply-exhaust) balanced cross-flow solar crawl space fans for larger spaces.
Custom solar powered fan solutions are a significant part of our business. Some past examples include -
Solar under deck drying fans