How Much Will An Attic Fan Cool My House

How an attic fan works.

How much will an attic fan cool my house.

An attic fan is installed on the slanted side of your roof or on one of the gable sides of your attic. As a certified licensed home inspector it is not correct to say too much ventilation is bad for an attic unless rain moisture is getting in. In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq. It provides good attic ventilation in addition to whole house cooling.

If the attic fan increases the comfort level of the house it may be worth it. My idea is to vent the build up of hot air that has risen to the ceiling in the hotspot rooms into the attic so that air from cooler parts of the house can move in. This makes your whole home cooler and could allow you to turn up your air conditioner s thermostat by as much as 10 degrees while still maintaining your comfort. Low cfm similar to a bathroom vent 300cfm and only in the hot spots basically by adding an inline ducting fan to the return ducts for the hotspot rooms.

Good insulation reduces fan effectiveness. The downside of attic ventilation fans. If the attic fan keeps the house cool enough so that the owners leave the ac off there is almost certainly an energy benefit. Venting a homes attic is a very important best building practices will say 50 at the ridge and 50 at the soffits unobstructed.

This was observed on numerous days following the installation. Temp 92 f at 5pm. The attic fan kept my house cooler by 8f compared to pre fan installation days. Yes installing an attic fan raises the electric bill.

Help your roof out. When an attic fan is operating during the hottest summer days the temperature in your attic can drop by as much as 50 degrees. Of vent for every 300 sq. 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.

These fans are designed to remove excess heat from your attic which in theory is supposed to lessen the load on the air conditioning in your home. During workdays would leave air conditioner off when leaving in the morning. Whole house fans should provide houses with 3 to 6 air changes per hour varies with climate floor plan etc check with a professional to determine what is appropriate for your home. Attic fans exhaust hot air from your attic to the outside.