How The Soffit Vent Works

The Soffit Vent by Moisture Flow® is patented and a class of its own. For 40 years, manufacturers have been making vents for the termination of the ductwork of the bathroom exhaust fan. All of the vents are venting the extracted moist air from the bathroom directly into the soffit’s passive airflow and are being drawn back into the attic.

Over thirty years ago, three of America’s most trusted experts on residential housing, Tom Silva “The Old House,” Henri de Marne, and  Alex Shults, Insta-Insulation, told homeowners not to vent the exhaust fans directly into the attic.

This illustration explains  Tom Silva’s video of the dangers of using improper vents in the soffit. The only soffit vent that solves the problem is the Soffit Vent by Moisture Flow ®. This Soffit Vent is new the Gold Standard of venting a bathroom fan to the exterior using the soffit as the termination of the exhaust fan’s ductwork. The Soffit Vent releases the extracted moist air outside of the soffit’s passive airflow and not into the soffit allowing it to be drawn back into the attic.

Because as a result of improper venting, the moist air is causing mold, moisture damage in the attic, and more importantly, contamination to one of four occupants. The effects of these improper venting systems cost homeowners billions of dollars annually in the USA.

In October of 2018, the Soffit Vent was tested by ReVireo, an industry-recognized firm for energy efficiency and green building services. Their analysis and verification services found that ridge vents combined with the Soffit Vent by Moisture Flow ® installed under eave venting, known as the soffit, are the most efficient system for venting a bathroom exhaust fan to the exterior.

The Gold Standard of Venting A Bathroom Exhaust Fan

The Soffit Vent is a revolutionary alternative to vent the roof. Cutting holes in the roof’s sheathing can often create water and mold damage from roof leaks in the attic. Venting through the roof can also void a roof warranty in some instances.

The Soffit Vent now offers builders and homeowners the ability to vent bathroom exhaust fans through the soffit safely and effectively.

The Soffit Vent uses the same concept of the exhaust system of a vehicle for Clear Air Quality.