Temp-Vent Powered Foundation Vents

Powered Temp-Vent systems are designed for foundations that require a higher rate of airflow and for areas that are difficult to vent. Depending on the model they can move large amounts of air per hour. Designed to run continuously on a low speed, they draw minimal electricity. However, Powered Temp-Vents require a Controls Kit (Power Supply, Thermostat, Humidistat) to control the operation of the vent.

To determine the correct number of Power Temp-Vents, use the following formula:1) Multiply the square feet of the crawl space by the height in feet. This gives the number of cubic feet in the crawl space.2) Multiply the cubic feet in the crawl space by the number of air changes per hour desired (4-6 is the recommendation). This gives the total number of cubic feet of air that has to be moved per hour to produce the desired number of air changes.3) Divide this number by 11,160 — for high output model — to obtain the number of power vents needed.4) Install vents to provide air intake on one side of the foundation with the power vents on the other side to create a system of intake and exhaust. 

Example:
1500 square foot crawl space x 3 feet high = 45004500 cubic feet x 6 = 27,000 / 11,160 = 2.42. Install 3 power vents with intake vents on the opposite side.