Whole house fans can be ran at any time of the day, however, depending on the time of year and the goal you have, the time of day may be different. For cooling purposes during the warmer months of the year, Whole house fans are designed to run whenever it is cooler outside than inside your home.
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.
Whole house fans which are large enough to create a breeze through the house can sometimes produce unintended effects such as noise, heat loss, and house depressurization. This can be improved with more attic vents and window area to replace the exhausted air. You must open windows.
Monitor Temperature: Keep an eye on the indoor and outdoor temperatures. If the outside air becomes warmer than the inside air, it's time to turn off the fan. Use in Conjunction with AC: In some climates, a whole house fan can be used to complement air conditioning.
ECONOMICS O F OPERATION
A large 18,000 Btu/h window unit air conditioner with an energy efficiency ratio (EER) of 8.8 costs more than 17¢ to operate for one hour. By contrast, a whole house fan has a motor in the 1/4 to 1/2 hp range, uses 120 to 600 watts, and costs around 1¢ to 5¢ per hour of use.
Whole-house fans cost significantly less to run than a window AC unit. You'll pay an average of $0.01 and $0.05 per hour to run a whole-house fan compared to $0.06 to $0.88 per hour for the cost to run a window AC, depending on its size and the size of your home.
Do not run your whole house fan during the day unless the temperature outside is cooler than the house is inside, though you may want to run the fan during the day to push air out of the attic. To do so, direct airflow from either the basement or the shady side of the home.
Modern whole house fans are quieter and better insulated, but they're still not as common. Today, it's hard for whole house fans to compete with heat pumps and ductless heat pumps, which operate more efficiently and deliver better cooling than either whole house fans or traditional AC systems.
Extra Hot days (over 100 degrees)
On some extremely hot summer nights, it will not cool off enough to run the whole house fan while you are awake at all. Use your whole house fan system for cooling the attic on these nights, to maximize a/c performance during the evening.
Many homeowners may think their house will get dustier by running the Advanced Whole House Fan. However, due to the amount of air an Advanced Whole House Fan moves when properly sized to the home, dust does not have any time to settle in the home!
Whole House Fans should never be used simultaneously with air conditioning of any kind – central air or window units. These systems can both reside in the same home and be used to complement one another, but they are more relay partners than three-legged-race partners.
Aging or Malfunctioning Blower Motor
As a blower motor ages, it may encounter mechanical issues or experience wear and tear, causing increased noise levels. bearings that are worn-out, bent fan blades, or an imbalanced motor can contribute to a noisy blower.
SHOULD I OPEN ALL MY WINDOWS IN MY HOME WHEN OPERATING A WHOLE HOUSE FAN? No, we recommend that you open very few select windows to match the proper net free venting of your home. The best way to use your system is to crack a window on the opposite side of your bedroom or hallway.
Before diving into details, here is the summary of the basics to know: –Yes, you can run an electric fan all day and night. However, fans that might have problems or look worn-out or suspicious should not be left running unattended. –Always check your fan to see if it is working.
Although it could run for over a 24 hour period, it is still best to turn off your ceiling fan when you are at work or out of the house for an extended time to give the ceiling fans' motor a rest and reduce electricity use and cost.
For cooling purposes during the warmer months of the year, Whole house fans are designed to run whenever it is cooler outside than inside your home. This is oftentimes during the early morning and nighttime hours. Because of this, most customers run their Whole house fan all night long on a timer.
Drawbacks of Whole House Fans
Air Filtration: They do not filter outdoor air, which can be problematic for residents sensitive to outdoor pollutants like pollen, smog, or smoke. Noise: Whole house fans can be noisy, especially if not installed properly.
Whole house fans can actually save you up to 90% on your electricity bill. Pacific Gas & Electric Co. (PG&E) claims that whole house fans use up to 90% less energy than compressor-based air conditioners. During the summer months air conditioning can cost up to $300 a month from June to August.
It is important to turn off the fan, close the windows, and close window coverings, before it starts heating up outside, to help your home reheating rapidly. At the end of the day, your home feels cooler and more comfortable because it resisted the heat better than it would have without the whole house fan.
For best results, run your whole house fan for at least 10 minutes first thing in the morning to bring a cool breeze through the house and into the attic. This will expel any hot stale air buildup from the night before. Then, close windows, doors and the blinds on the sunny side of your home.
So yes, running HVAC continuously throughout the day and night is perfectly safe!
If you do not open the proper amount of windows, you will increase the chances of back-drafting. Back-drafting happens when outside air is pulled into the home through vent pipes. As a result, polluted air could be entering your home.
Whole house fans can be extremely effective for improving air quality and comfort in a home. Designed to create better ventilation, cooling and air circulation, these units can be both energy-efficient and extremely effective.