Table of Contents
How do I choose a whole house fan?
To get the proper whole house fan size, you should first calculate the square footage inside your home, excluding the basement, attic, and garage. Multiply the square footage by 3. For instance, if your home is 2,200 square feet, you’ll need a fan that can move 6,600 CFM of air per minute or more.
What CFM whole house fan do I need?
We use a general formula of either 2, 2.5, or 3 CFM, or “Cubic Feet per Minute”, per square foot of living space. 2 CFM would provide a good system, 2.5 CFM would provide a better system, and 3 CFM would provide the best system.
Are whole house fans healthy?
Luckily, Whole House Fans do a lot more than just cool your house. One of their greatest benefits is that they whisk away all the pollutants trapped in dormant, stale indoor air and replace them with fresh outdoor air, dramatically improving the air purity and health in your home.
How big of a whole house fan do I need?
Recommended whole house fans and their sizes Area (Sq.ft) Recommended CFM Recommended models 1000 2000 – 3000 1500 3000 – 4500 Cool Attic fan 2000 4000 – 6000 QuietCool CL-6000 2500 5000 – 7500 Cool Attic CX302DDWT.
What’s the difference between an attic fan and a whole house fan?
Attic fans are quite different. They’re installed up on a roof or through an exterior wall up in an attic. Whole-house fans need windows and doors open and attic fans need lots of soffit vents to suck cooler outdoor air up into the hot attic. Without this open space, the fans will not move much air.
Can I run my whole house fan all night?
Getting the most from your AirScape Only use your fan when the outdoor air is cooler than your indoor air. Make sure your A/C is off when you run the fan to avoid wasting energy. We recommend running the whole house fan all night. The goal is to cool your entire house down, not just the air.
How many CFM do I need for a 3000 sq ft house?
800 CFM Room Size: CFM (At 2 ACH) How many CFM for a 2500 sq ft house? 667 CFM How many CFM for a 3000 sq ft house? 800 CFM.
What size attic fan would an electrician need for a 1500 square foot home?
Attic fan size chart for quick reference Attic floor area Recommended attic fan size 1000 sq.ft 700 CFM 1500 sq.ft 1050 CFM 2000 sq.ft 1400 CFM 2500 sq.ft 1750 CFM.
Does a whole house fan need a dedicated circuit?
You only need an individual branch circuit (what’s called “dedicated” in the trade) in specific scenarios. Kitchens and similar areas need a small appliance outlet dedication.
How long do whole-house fans last?
You can expect a whole house attic fan to last about 10 to 20 years, with an average of 16 years. Although they were a standard appliance in the hallway ceiling of Florida homes before air conditioning, we don’t see too many whole house fans anymore. And the ones we do come across are often long-ago abandoned.
Can whole-house fans cause mold?
A properly set up whole house fan can cool an entire home in about an hour. It pulls air through any cracks and crevices that it can and can even pull up damp air from crawl spaces under your home up through living spaces and cause mold problems.
Does a whole house fan create negative pressure?
Whole house fans have one function — to push hot air out of your attic, and pull cool air back into your home. It’s that simple! The negative pressure created by the fan draws cool air in from the open windows and circulates warm air out through vents in your attic.
Can you run a whole house fan with the windows closed?
Since the windows need to be open to properly and safely use this appliance, and windows need to be closed to effectively run an air conditioner, the two appliances should not be used simultaneously. Cover and seal your whole house fan when the weather turns cold.
How much power does a whole house fan use?
A whole house fan uses 200-700 watts while an air conditioner uses 2,000-5,000 watts. It will cost 90% less to run a whole house fan than the central air. For example, if your bill is $150 for a month, using a whole house fan will allow you to save up to $135 a month!May 9, 2020.
Is solar attic fan worth it?
Go Green – Solar attic fans are environmentally friendly, harnessing the sun’s power without the need for electricity. A Good Investment – For Florida residents, more than 250 days of sunshine are normal, making a solar attic fan a good investment designed to make your home more comfortable and lower your energy costs.
Do you need both attic fan and whole house fan?
You don’t need to choose between either a whole house fan or an attic fan; they are not mutually exclusive. You can install a whole house fan to draw air up through the house and an attic fan to remove that air from the attic.
Are whole house fans quiet?
A whole house fan is a ventilation cooling system that uses less energy than a traditional air conditioner. These whisper-quiet and energy-efficient wonders are the #1 residential cooling & ventilation appliance on the market.
Does a whole house fan add value?
While it might seem like a small thing, installing a whole house fan, it could be a game changer for future homebuyers, particularly in environmentally conscious locations, like Southern California. One study showed energy efficient homes actually sell for 7% more.
Do whole-house fans bring in dust?
Some types of whole-house fans bring air from the outside and at the same time push air out of your house. In these cases, it makes sense to have a filter, as the outdoor air could contain contaminants, especially dust or, if you live in a metropolitan area, exhaust fumes.
What do whole-house fans do?
The whole house fan pulls air in from open windows and exhausts it through the attic and roof. It provides good attic ventilation in addition to whole house cooling. Whole house fans should provide houses with 3 to 6 air changes per hour (varies with climate, floor plan, etc.
Is it cheaper to run a fan or central air?
Use fans to help the AC Fans are cheaper to run than air conditioners, and can be used in place of air conditioners or along with them to save money. If you have a ceiling fan, run it at the same time as the AC. It pushes cooler air down and over the bodies of the people in the room.
