A lot of my clients ask me concerning the big square box within the center part of the house’s upper floor ceiling behind some self-closing louvers. It’s a huge house fan and it will either benefit homeowners or make living conditions worse.
* Preferably mild climates with cooler and fewer humid nights
* Utilize it only when the temperature and humidity outside is a lot more favorable compared to the conditions indoors. When your air conditioner system has been operating during the day, and the temperature outside drops lower (nevertheless the humidity continues to be high), don’t turn the this tumbler. The vent will suck each of the humid air into your air conditioned house
* A good time periods to work with it might be, obviously, morning hours and evening
If you suffer from allergies, it may not be a smart idea to bring all of the pollution to the house. Your window screens will stop a number of it, but whole house fans are incredibly powerful and will make you sneeze more than ever before.
1. Before you decide to turn the fan on, open as much windows and doors as you possibly can, close fireplace damper and / or glass door, and shut the furnace / hot water heater room doors (if they are louver type, it won’t matter). The suction of the whole house fan (no less than with the highest speed) is really great, that without open windows / doors, it would draw air externally through any possible openings like, for example, from your chimney. When it is a fireplace chimney and you also don’t remove the ashes… well, it’s likely to be a mess. Should it be a water heater / furnace chimney, it may blow off the pilots.
2. When all things are ready, it is possible to activate the whole house fan and often inside the next matter of moments you ought to feel a good amount of exterior air flowing around the house. Unless…
3. This part is equally important as opening the doors and windows – both really need to be balanced to perform properly in order to really benefit from the whole house fan operation. Air drawn with the whole house fan must be discharged from the attic vents on the exterior. Otherwise, pressure created inside the attic area will cause the environment that had been just pulled out of your house to come back with dust and insulation particles through any possible gaps inside the attic wh0le as well as the whole house fan itself.
Regular attic ventilation will not be enough to assist the check my site operation; you may need far more to hold all that extra volume of air for the exterior. Along with the formula to calculate the sq footage from the attic vents required to discharge that air is very easy. You simply need the dimensions of your rooms:
Example: your ceilings are 8′ high and you will have four 10′ x 14′ rooms, one 15′ x 17′ room, along with a 10′ x 3′ hallway (this is simply a sample, calculate each of the rooms in your home you think ought to be covered)
10’x14’x8′ = 1120×4 = 4480
15’x17’x8′ = 2040
10’x3′ = 30
Total – 6550 cubic feet
Now you must to divide 6550 by 750, which equals 8.73 sq feet – this is the section of the required attic vents (every one of them combined – soffit, ridge, gable, etc.)
4. If the house you’re getting into has the whole house fan already installed, lets hope which it was properly sized up for its purpose (there may be a tag in the unit itself), which would be to replace your home air within only a few minutes.
5. If you’re normally the one installing the whole house fan, consider 3 or 4 minutes as being an optimal time for your house air exchange. To accomplish this, you’d should divide your house total air volume (6550 cubic feet from our sample) by 3 or 4 minutes. That will provide us with 1810 CFM / 1357.5 CFM (Cubic Feet each and every minute).
6. Yet another crucial thing: louvers in the see this usually are not air tight and get no insulation applied on their surface; they leak air between your house and attic. I would strongly suggest installing an entire house fan cover in attic area to avoid air drafts during the cold season – don’t forget to eliminate it when you use the fan again.
Whole house fans are noisy and lots of people never make use of them, nonetheless they might benefit your wallet when you apply all of the above. You can find currently other house ventilation systems available: they cost more (2 – 3 times) but very quiet, more effective, and offer air circulation for prolonged time periods.