Attic Fan Blow In Or Out

Aim to set up an equal number of in and out blowing fans.

Attic fan blow in or out.

The more window fans you have working the better. If you have only one box fan turn the fan in or out of the window in accordance with the outside temperature. Set them both to draw air out. Trying to solve the heat gain problem in your attic by using a fan is like lying out at the beach with a fan blowing over you and thinking you re not going to get a sunburn.

Many are solar powered and require no other wiring so they don t cause any additional charges on your electricity bill. Attic ventilation fans also tend to be quite energy efficient in terms of their own operation. Strong attic fans can actually back draft furnaces or water heaters by pulling combustion gases out of their burners and into the home. Several months ago i re connected my attic fan after finding that it had been.

Using a fan to blow hot air out of the attic doesn t address the radiant heat flow from the roof to the attic floor. If you have an odd number configure the extra one to pull air in. If there are not enough soffit gable or ridge vents a powerful attic exhaust fan can pull the air from your home through the ceiling if it is not perfectly sealed off. Code homes my home is concrete block with a couple of blow out wood walls 100 vented soffits large hurricane roof vents and 13 16 of blown insulation.

We have 14 ceilings and ceiling fans that run 24 x 7. Of clearance above the fan. If you set one to push air in you ll be pushing all kinds of dust dirt and insects into the attic space. 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.

A powerful fan draws cooler early morning and evening air through open doors and windows and forces it up through the attic and out the roof vents. In order to have fresh air blow into the room you need a way for stale air to blow out of the room. In order for the exhaust fan to work you d need to open a window too. Gable fans fit into the gable vent and can be set to operate only within a preset temperature range.

Much of that heat then conducts downward and finds its way into the house. That creates a. The air source will come from the eaves of the roof. Like most floridians in post hurricane bldg.

This sends hot air up and out cooling your house and your attic.