How To Use A Whole House Fan In A Two-story House

Most air conditioners are designed to provide air that is about 20 degrees cooler than the temperature inside the home.for example, if the temperature inside the house is 82 degrees, the a/c unit will produce 62 degree air which in turn will cool the house about 1 to 2 degrees each hour. The wet towel will dramatically increase the fans’ cooling performance for about 1 hour.

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How to use a whole house fan in a two-story house. This causes your fan to pull the air all the way across your bedroom or hallway to help cool your entire home quicker and more efficiently. Fully open a few windows. My house is 3,000 square ft.

Also, you can use a whole house fan in moderate climates to help reduce your air conditioning use unless, of course, it’s extremely hot outside. A 2' x 2' opening for a fan results in 4 sq ft. We recommend running the whole house fan all night.

Should i get a big 36 attic fan that will move a ton of air and hypothetically cirulate the whole house or should i just plan on it working for the upstairs only and get a smaller (24 or 30) fan. The 9155 has cfm of 2470 / 1700 / 1360, so even high is slower than low on the 9166. I live in southern california where it gets warm during the day and nice and cool at night.

The whole house fan pulls air in from open windows and exhausts it through the attic and roof. The fan cools a house by using the temperature difference between the inside and outside air, and can never make the temperature lower than that of the outside air. Slightly open (a few inches) several windows.

Due to positive pressure, air in the attic is pushed out through the vents or gables. Two of the top ways for how to keep attic cool include: Select a size of towel that matches the size of the fan.

Ensure that the home has at least 1.5 times the area for discharge as the opening you cut into the ceiling for the fan. A whole house fan, while it may draw cooler air into the house during the evening hours, does not dehumidify the air. The air propelled by the fan will push past the towel and the cold water will lower the temperature of the air.

The goal is to cool your entire house down, not just the air. Whole house fans should provide houses with 3 to 6 air changes per hour (varies with climate, floor plan, etc.—check with a professional to determine what is appropriate for your. On the other hand, attic fans simply force hot air out.

Whole house fan with attic fans hi martin, thanks you for the excellent article and thoughtful responses to questions. If you want to know what a whole house fan is and what it can do for you check out my video on installing a quiet cool whole house fan. You will have these three options, or maybe a mix of each.

For homes or buildings with a whole house fan, the hot air is pulled into the attic. It provides good attic ventilation in addition to whole house cooling. A whole house fan is a great idea for mornings and late evenings, but any time after 10 am, you’ll just be bringing in the hot outside air, so most people are going to resort to their ac system.

A whole house fan can be used as the sole means of cooling or to reduce the need for air conditioning. A whole house fan works through suction by pulling in the cooler outdoor air into the home’s interior. A whole house fan creates a cool circulation by suctioning air from different parts of your home and replacing it with the air outside which is cooler.

Make sure your a/c is off when you run the fan to avoid wasting energy. Will a whole house fan work well in a two story house? Although such fans don’t remove humidity from the air.

(i can't find the rpm listed on the 9155.) both models mount on the sill in front of the window, so that the window can be closed behind it. The steps are exactly the same however in this case you need to open a window on the top floor as well. No, we recommend that you open very few select windows to match the proper net free venting of your home.

In order for this to happen, you will have to either…. It takes time to pull the heat out of the sheetrock, structure and contents of a house. The best way to use your system is to crack a window on the opposite side of your bedroom or hallway.

Whole house exhaust fans are not the same as air conditioners. So while the air may be colder it may not feel as comfortable. Doing so will get rid of unnecessary moisture and heat that may settle up on the second floor.

Quite simply, a whole house fan cools a structure by pushing hot air out through attic vents and drawing cooler, fresh air inside through open doors and windows. Only use your fan when the outdoor air is cooler than your indoor air. So, if the fan is 18 inches (46 cm) across, use a towel with roughly the same width.

Simultaneously, negative pressure is created in the living area, which helps to draw cooler air in through the windows. The air will also come through the windows on the ground floor blowing through the stairs into the first floor and into the attic. If both methods of cooling are present, seasonal use of the whole house fan (during spring and fall) may yield the optimum combination of comfort and cost.

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