Air Vent House With No Attic

My parents own a home about 40 years old and there is black mold coming from the a c ducts.

Air vent house with no attic.

The fans install in the attic above a central hallway. The attic exhaust vents and intake vents become exhaust outlets for the air the fan dumps into the attic while the unit is running. For one reason or another it may be impractical or impossible to construct this main vent through the roof so it s usually permissible to extend it from another part of the house. They live in a townhome with no attic or basement or crawlspace of any kind.

If you go this route you will need additional vents to allow the air to get out i recommend you use static vents for this purpose. Authoritative expert building diagnostic and repair advice toxic black mold and. It s a roof top installed shingle over intake vent designed based on roofing contractor feedback from our ask the expert seminars. The most common way to add ventilation to an attic is by installing air intakes in the soffits and putting an outlet at the gable of the house.

This is called passive ventilation. This creates a natural air flow by drawing in the air from outside pushing it up and out through the vent at the top of the house. The edge vent provides proper intake ventilation for homes with little or no overhang. When the attic becomes part of the home to be heated and cooled open wall gable vents and roof vents are no longer feasible but the underside of the roof the sheathing and rafters can still get.

The edge vent air vent s intake vent. Open up the windows inside the house turn on the fan and it pulls in cooler outdoor air to replace the warm indoor air dumping it into the attic. Don t avoid ventilating your attic for fear you re letting cold air into the house. Without baffles blinders that prevent outside air from crossing over the vent a ridge vent may create almost no ventilation at all.

Gable vents may circulate air through only a small percentage of your attic. Another option for homes that have no place for intake vents would be to use a modified solar fan. It can be used to supplement existing soffit or undereave vents as well. Obviously more research is needed but here s what we do know.

You will reverse the wires to make the fan blow into the attic as your intake. Obviously this means a lot of ripping and tearing etc. Your actual living space is sealed. Roof eave venting on roofs with no overhang or soffit how to correct improper or inadequate attic or under roof ventilation in buildings detecting and correcting attic condensation and preventing ice dam leaks in buildings how to correct improper or inadequate attic or under roof ventilation in buildings.

Static roof line vents are effective for ventilation but generally aren t recommended due to issues with leaks. Part of the unit is inside and part is on the roof.