Attic Fan Energy Savings

Attic fans are a good option for regulating your.

Attic fan energy savings.

Using your duct system as a whole house fan. 5 ways to make your attic more energy efficient 1. Whole house fans energy requirements are just 10 15 percent of what you could expect from the a c unit. 70 168 at 50 savings 126 302 at 90 savings.

The fan blades spin but they don t lower the attic temperature at all. Attic fans can create a negative pressure condition in your home causing vented appliances to backdraft. To prevent this follow the air sealing and insulation strategies in this guide and make sure the attic is well ventilated using. You can set a multi speed fan to a lower speed when noise is a problem.

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. Attic ventilation fans are typically mounted to an exterior wall in the attic. When a c typically costs 140 336 per month that s a savings of. The point of having an attic fan is to lessen the load on your ac system saving you money.

And i agree with the additional energy costs but my attic fan is a 1500 cfm 40 watts. Depending on what your utility charges that s about 40 per year. And this is a gable fan. This type of system blows hot air out of the attic but it can have a negative effect.

Danny s tests of solar attic fans showed that in florida where there s abundant solar energy yearly savings from installing two fans in a house with just over 1 000 square feet of air conditioned floor area amounted to only 460 kwh. You don t want your unfinished attic cooled by your air conditioner. Energy credits whole house fans use a significantly lower amount of energy to operate than air conditioners or central heat and air units. This backdraft can bring dangerous and toxic fumes into your home like carbon monoxide an odorless and deadly gas.

Whole house fans differ from dedicated attic fans because whole house fans create airflow throughout the house while attic fans only serve to ventilate the attic space. I understand a blower door test would show the air leaks and i ve seen this 2x but i m trying to understand with an attic fan on in an unsealed attic the attic fan should pull the air in the home up into the attic. Venting an attic allows outdoor air. When turned on the fan draws cool air through the windows up and into the attic helping to push warm air out of the attic.

Install energy efficient ventilation to improve air circulation in your attic. This will use more energy and make your air conditioner work harder which will increase your summer utility bill.