Powered Attic Fan And Ridge Vent

Unlike ridge vents attic fans use electricity and need regular maintenance to keep working properly. When the power vent goes on it can actually pull air from the ridge vent which can cause an imbalance of airflow along the underside of the roof deck. By installing more roof vents such as a ridge vent you increase the possibility that most attic air will come from outside says tim carter a residential contractor in cincinnati.

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Having both a power vent and ridge vent installed on your roof can short circuit the attic ventilation system.

Powered attic fan and ridge vent.

And then the vent fits on top of that. If you have few vents in your attic most of the air will be drawn from inside the house. Ridge vents are a passive system simply allowing hot air to rise up through them rather than pushing it out as a fan does. Now for the other sections of roof and attic that are again separated from that garage space there you should use a continuous ridge vent.

Choosing a ridge vent or an attic fan. Since your solar vent fan only moves 500 cfm a third to half that of a typical hardwired attic vent fan it probably won t move enough air to reverse the action of the ridge vent. And be careful with the type of vent that you. Also since the fan is powered by the sun it should turn off when the sky is overcast during a storm which will keep it from drawing rain into the attic.

Attic fans can also make a lot of noise. While a power vent fan combined with a ridge vent can work against the natural flow of air through the attic it will still exhaust more hot air than not having a fan at all it s just not the most efficient way to go about it. Fan rarely necessary vents that run along the roof ridge are an alternative to those that exit through the roof decking or gables and if the ridge is long enough they may be the only roof vents. A fan may actually suck air conditioned air from your home into the attic.

If all this seems like too much to take in you can always call on the pros for help. Make sure the ridge line is cut open at least an inch to an inch and a half so you have a good wide gap at the top. An attic fan is an active system that actually forces air out. When you are deciding between a ridge vent or an attic fan consider the needs of the attic.

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