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Take for example ridge vents.

Roof power vent good idea.

While a simple vent is sometimes used to allow for the passive flow of air it s also possible to add a powered attic fan commonly called an attic power ventilator. Organizations such as the nrca recommend against this roof vent style in cold climates because it can promote ice dams. Hot air exhaust vents located at the peak of the roof allow hot air to escape. While hardly anybody agrees on the best roof ventilation system everybody agrees some roof vents do hardly any good at all.

On the other hand power vents are a better choice for hip roofs which often lack ridge line footage for venting and for homes in the northeast where fluctuations in winter temperatures can sometimes make passive venting impossible. Even if your roof already has ridge vents and plenty of ventilation built in it s a good idea to install gable fans or roof fans to help blow hot humid air out of the attic. Slits in the product allow for air to flow into the attic. Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof.

First off a roof vent is going to depressurize the attic. Attic power ventilators are mounted to the roof of the home and are connected electronically to a power source and in most cases the home s thermostat. A drip edge vent is made of a corrosive resistant material that sticks out about three inches back from the roof edge and then bends downward over them. The money would be better spent addressing problems the roof vent was meant to cure.

The master flow erv5 power roof vent is the master flow erv5 power roof vent is a great overall investment in attic ventilation. As the air leaves it creates negative pressure behind it sucking in cool air from below into the soffits and creating a self repeating ventilation process. The majority of roofing experts agree that ridge vents are the most effective and cost effective roof vents available. Any leaks from the interior are going to be exaterigated sp.

In either case there needs to be a balance between intake and exhaust as well as adequate attic insulation. So more air is not leaking from the house. Of course you try to make the attic scuttle hole use air tight trim on your ceiling cans but it would be foolish to ignore the benefits of a reasonably powered attic fan working in connection with adequate soffit venting.

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