Why Does The Attic Fan Blow Dirty Into House

If you re layering insulation atop other insulation don t use the kind that has kraft face finish i e paper or foil backing.

Why does the attic fan blow dirty into house. Excessive moisture will cause condensation on roof members and insulation. The downside of attic ventilation fans. We include blown in attic insulation pros and cons but we can t recommend blown in fiberglass or cellulose as your best insulating choice. Most municipalities require extractor and exhaust fans to be vented to the outside of the building with an vent cap.

Finding and sealing those could be a big benefit. One static vent style is the turbine vent which uses wind to power its enclosed fan all it takes is a light breeze to rotate the blades and suck heat out of the attic view example on the home. It has ridge vent and soffit vents but is still hot as hell. Good insulation reduces fan effectiveness.

Insulation efficiently fills. This is why attic spaces are required to have ventilation built into. I have been considering installing a couple of 8 duct booster fans in my attic attached to vents at the top of my screen porch ceiling to blow some of this much cooler air into the attic. This section of the attic is in an addition about 16 x 25 that is blocked off from the main attic of the house by a sheet of osb.

It could also cause condensation leading to mold issues. The pressurized air in the attic will force its way through ceiling cracks into the conditioned house. You might also need soffit vents if you don t have them so that air can flow in there and then out at the ridge vent. Trapped air and heat in the attic would cause problems for some roofing materials.

Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool. However that service does add to the cost of restoration. This moisture feeds mold growth. This will cause mold and could leave your home unlivable.

In this case we worked with the insurance company and took care of packing out belongings in the attic. Unfortunately improper installation or choosing the wrong kind of insulation causes moisture from the lower levels of the home to rise and get trapped in the attic. In other words the fan will make the ceiling leak at a higher rate than it otherwise would. You ll end up with more hot air leaking through your ceiling during the summer than if you had no fan.

The warming of all these surfaces is why the attic interior gets so much hotter than the exterior temperature. It s likely you have air leaks from the house into the attic. Case in point don t vent your extractor fan to the attic. However the utility of attic ventilation fans is actually quite a controversial topic.