A lot of my clients ask me concerning the big square box in the center part of the house’s upper floor ceiling behind some self-closing louvers. It’s a huge house fan also it can either benefit home owners or make living conditions worse.
* Preferably mild climates with cooler and fewer humid nights
* Apply it only if the temperature and humidity outside is much more favorable in comparison to the conditions indoors. If your air cooling system continues to be operating during the day, and the temperature outside drops lower (although the humidity is still high), don’t turn the click for more info. The vent will suck each of the humid air in your air conditioned house
* The optimum time periods to make use of it could be, needless to say, morning hours and evening
Should you suffer from allergies, it might not be a good idea to bring every one of the pollution to the house. The window screens will stop some of it, but whole house fans are incredibly powerful and could make you sneeze more than ever before.
1. Before you turn the fan on, open as numerous doors and windows as you 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 from the whole house fan (no less than on the highest speed) is indeed great, that without open windows / doors, it would draw air externally through any possible openings like, by way of example, from the chimney. When it is a fireplace chimney and you also don’t take away the ashes… well, it’s gonna be a mess. If it is a water heater / furnace chimney, it may blow off the pilots.
2. When everything is ready, it is possible to start up the full house fan in most cases throughout the next few seconds you need to feel a good amount of exterior air flowing throughout the house. Unless…
3. This part is equally important as opening the windows and doors – both really need to be balanced to function properly as a way to really take advantage of the whole house fan operation. The air drawn from the whole house fan needs to be discharged through the attic vents towards the exterior. Otherwise, pressure created within the attic area will cause air which had been just pulled from your house to return with dust and insulation particles through any possible gaps from the attic wh0le as well as the whole house fan itself.
Regular attic ventilation will not be enough to assist the Tumblr operation; you will need a lot more to handle all of that extra volume of air on the exterior. And also the formula to calculate the sq footage in the attic vents required to discharge that air is simple. All you need is the dimensions of your entire rooms:
Example: your ceilings are 8′ high and you have four 10′ x 14′ rooms, one 15′ x 17′ room, along with a 10′ x 3′ hallway (this is merely a sample, calculate each of the rooms in your home you feel must be covered)
10’x14’x8′ = 1120×4 = 4480
15’x17’x8′ = 2040
10’x3′ = 30
Total – 6550 cubic feet
Now you have to divide 6550 by 750, which equals 8.73 sq feet – this is the section of the required attic vents (them all combined – soffit, ridge, gable, etc.)
4. When the house you’re relocating to provides the whole house fan already installed, lets hope that this was properly sized up for the purpose (there could be a tag in the unit itself), which would be to replace your home air within just 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 that house air exchange. To accomplish this, you’d should divide your home total air volume (6550 cubic feet from our sample) by 3 or 4 minutes. That may give us 1810 CFM / 1357.5 CFM (Cubic Feet per Minute).
6. One more essential thing: louvers of your Tumblr are not air tight and also have no insulation applied to their surface; they leak air between the house and attic. I would personally highly recommend installing a complete house fan cover in attic area in order to avoid air drafts in the cold season – don’t forget to get rid of it when you utilize the fan again.
Whole house fans are noisy and a lot of people never make use of them, however they might benefit your wallet if you apply the above. You will find currently other kinds of house ventilation systems available: they are more expensive (2 – three times) but very quiet, more efficient, and give air circulation for longer intervals.