Whole House Fan Negative Pressure

A house exhaust fan is a machine that draws air out of a building and throws it to the roof thus creating a negative pressure difference that results in cool air being forced into the building through the open windows.

Hunter fan troubleshooting. Conversely if the smoke was localized then we would place the fan about 6 from the door on the inside of the house facing out thus creating a negative pressure in the house. The more efficient whole house dehumidifiers are more efficient at removing water vapor from the air in a house than the ac system. A whole house fan works by creating negative pressure.

Energy auditors write them up. How does a whole house fan work. Installed in your attic or roof it works by pulling air into your house through open windows and pushing it out through your attic.

Creating a negative pressure inside the house draws in outside moisture and pollutants. Imagine a small fire starting in the home while the fan is on and the family is sleeping. Will the fan draw smoke past the smoke detection system too.

The air blowing into the house would increase air pressure and force the smoke out of the rooms. Always either open a window or door when the system is running you could create a negative pressure zone in the house and this could be dangerous and might cause back drafting from gas appliances. Many people confuse a whole house fan with an attic fan but the two accomplish different goals.

Because whole house fans were cheaper than air conditioners and worked well they began being used in the 1950s primarily in the south. It is designed to perfectly serve a house that is 2000 to 3000 square feet. Also it is intended to offer an efficient way of reducing cooling costs and ensure you have a very comfortable house.

A whole house fan pulls air out of a building and forces it into the attic space or in the case of homes without attics through an opening in the roof or an outside wall. It cools your home by moving cool air in and hot air out. This causes a positive pressure differential in the attic forcing air out through the gable andor soffit vents while at the same time producing a negative pressure.

As with every system there are drawbacks but in all honesty there is only one true negative to a whole house fan system. Crawlspace environments are actually sucked into the living space. This fan is a 30 inch whole house fan with a 2 speed belt drive.

Should home inspectors too.