Fresh Air Fans

An untempered fresh air fan, also known as an untempered make-up air unit (UMAU), is designed to introduce fresh air into a building without heating or cooling it. By replacing exhausted air, these fans help maintain proper air balance and prevent negative pressure issues. 

A conditioned fresh air fan is a fan that supplies filtered, heated, or cooled air to a building by delivering temperature-controlled fresh air. These fans help maintain indoor air quality, regulate building pressure, and improve overall comfort.