Attic Power Vent - Attic Ventilation qoute clarification Basics

Attic power vent warning:

Fan blades are extremely sharp! When doing any type of maintenance work around it, make sure that power contribute to the motor has been turned off! Most of those vents are controlled by a heat or humidity sensing switch, and can become active/cause injury while you're performing cleaning.

Humidity Sensing

Humming, muffled noise coming from above the ceiling during the summer is most likely an attic power vent, working hard to pull out hot air from under the roof (attic power vent should be located close to the roof ridge - top, or installed as a gable vent).

Attic Power Vent - Attic Ventilation qoute clarification Basics

The most base installations contain adjustable thermostat and in some cases humidistat, which activates an attic power vent motor accordingly with your preferences (once set, it operates automatically responding to climatic characteristic or/and humidity changes).

There are also some devices preset by the maker (usually between 85F - 100F), and attic power vents with no sensor at all, controlled by on/off switch mounted in various location (usually close to the attic entrance).

For the attic power vent to serve its purpose properly, and save instead of wasting your money, certain requirements have to be met:

There must be other, enough number (or more likely quadrilateral footage area) of ventilation ports installed in lower section of the roof.

Those ports are called:

• soffit vents, if your house roof has an overhang, which extends beyond the house exterior wall
• or gable vents - located at the attic area, generally on the exterior wall where the two planes of a sloping roof join, forming a triangle

There's a possibility, that type of your roof allows only for facility of vents on its exterior - good examples are hip roofs on many of the Chicago style Georgian type homes, which have no overhang/soffits.

In such case, if the attic power vent has been installed in upper section of the roof, passive vents should be located not less than 1/3 of the length between the roof bottom edge and top (ridge). Hip / ridge vent theory can be also installed, or vented drip edge mounted along the roof edges.

For the attic power vent to achieve efficiently, the attic floor, and all penetrations between the attic and living area of your house should be properly insulated and sealed.

Any gaps, holes, and lack or inadequate number of attic vents will cause attic power vent to generate a vacuum, and remove Ac cooled air from the house. In some properties, there's an open duct (or two) between the attic and utility room, which provides combustion air for gas burning appliances - it must remain open on both sides.

• Make sure that the attic power vent, or its occasion is protected with wire mesh / screen. Vents are ordinarily adequate with wire mesh that wraps exterior of the fan blades housing, and prevents rodents from accessing attic area. If that screen becomes damaged and you determine to install one from the attic side, be ready to clean it often - the birds often build nests inside the fan, especially during the cold season.

Also, some of the larger animals are strong enough to jab this obstacle, in the process damaging fan blades. Therefore, it's a good idea to seek your attic periodically - be careful, most attics have no flooring installed, and walking on framing is difficult / if possible, seek fan health from attic entrance point.

Before installing a new attic power vent in your house attic area, make sure you properly speculate quadrilateral footage area - vent calculator. If installed fan is too small, it will have to control much longer, to move the same number of air through the attic.

• Adjusting thermostat too low might cause fan to run constantly during hot summer - try to set the climatic characteristic dial to a 100 -110 degrees Fahrenheit.

The fan should start automatically as soon as the attic climatic characteristic rises above the preset setting, and cuts off when the attic is cooled down to roughly 10% below the thermostat setting.

Go Green and try low voltage, solar battery operated power vent - saves money on installation, very quiet, but roughly 3 times as expensive, as a quarterly attic power vent.

Attic Power Vent - Attic Ventilation qoute clarification Basics

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