Attic Fan Power Consumption

Attic ventilation will usually need to be increased to exhaust the fan s air outdoors.

Attic fan power consumption.

You could run 30 fans using 50 watts for the same power consumption. A more helpful comparison may be to an air conditioning unit. Consider a space heater which will use roughly 1 500 watts per hour. Attic power ventilators are simply not.

The attic fan kept my house cooler by 8f compared to pre fan installation days. As you can see the consumption correlates to the wattage of the appliance. This was observed on numerous days following the installation. The net free area of a vent takes into account the resistance offered by its louvers and insect screens.

Temp 84f at 5pm. Attic power ventilators energy consumption while the specifics will change with each home the general consensus is that attic power fans actually use more energy than they save. Not many appliances in the home consume as little power as a fan. When set at low speed fans use between 15 and 30 watts and at high speed they consume between 50 and 100 watts.

After attic fan installation ac still off during day. However if your attic has blocked soffit vents and is not well sealed from the rest of the house attic fans will suck cool conditioned air up out of the house and into the attic. The electricity consumption of a ceiling fan ranges widely depending on the design and the speed setting of the fan. You ll need 2 to 4 times the normal area of attic vents or about one square foot of net free area for every 750 cubic feet per minute of fan capacity.

Energy usage of about 40 watts at medium speed is typical. Temp 92 f at 5pm.