Attic Fan Intake Or Exhaust

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Attic fan intake or exhaust.

It is designed to lower the temperature of an attic by exhausting air from the attic and replacing attic air. As previously mentioned both intake and exhaust vents are needed for the ventilation system to be effective. If the attic ventilation system cannot be balanced 50 intake 50 exhaust it s better to have more intake than exhaust because it s been our experience most houses lack proper intake. Do not use mechanical means electric attic fans.

Gable vents are a type of louvered vent that can act as an intake or exhaust vent depending on which way the wind is blowing. Unlike a ventilation fan a whole house fan an attic mounted fan that exhausts air from a home at night is designed to cool a house that is to lower the indoor temperature. Additionally any excess intake will become exhaust on the leeward side of the house because the intake vents on the windward side of the house will have. Soffit vents should be checked to confirm that they aren t.

They can quickly remove a larger volume of hot and or humid air from your attic compared to static ventilation which helps save money on your heating and cooling. Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. Master flow egv5 gable mount attic ventilators are master flow egv5 gable mount attic ventilators are a great choice for exhaust ventilation. Gable mount attic fans quickly remove a larger volume of hot and or humid air from your attic compared to static ventilation which helps save money on your heating and cooling costs.

It can be controlled by a thermostat or moisture monitor. A powered exhaust vent is much like a roof mounted exhaust fan. 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. Blocked by attic insulation because insulation baffles weren t used.

A powered attic ventilator has a different purpose. Best ventilation is open soffit venting to a open vented ridge vent. Lack of intake or exhaust vents. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space.

Ridge vent must me installed per the manufactures instructions. Good insulation reduces fan effectiveness. You can t have one without the other. More than 50 of the attic fans i see do not work and have current still live to the motor.

However the utility of attic ventilation fans is actually quite a controversial topic. One of the leading causes for fires. They are typically easier to install and won t detract from the appearance of your roof.