Attic Fan Ductwork

It was new when the ac was put in 7 years ago.

Attic fan ductwork.

Move the ducting and equipment to the crawlspace or the interior of your home. Much of that heat then conducts downward and finds its way into the house. Throw duct leakage into the mix and the problems are even worse. Using a fan to blow hot air out of the attic doesn t address the radiant heat flow from the roof to the attic floor.

If you have ductwork furnaces air conditioners water heaters water piping etc. In your attic it would be a good consideration to. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms.

This is much easier to do if you have attic access because if you don t you usually have to remove some ceiling drywall and run the ducts along a joist. Trying to solve the heat gain problem in your attic by using a fan is like lying out at the beach with a fan blowing over you and thinking you re not going to get a sunburn. That condensation drips from the duct work in the attic space and the exhaust fan. Jim asks is it ok to have a bath exhaust fan vent into my attic no it s never a good idea to have any exhaust fan in your home dump all that hot moist air in your attic.

This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. When bathroom exhaust ducts are not properly insulated and vented the warm moist air traveling through them hits the colder section of the duct in the unconditioned attic space causing condensation on the duct work. With hundreds of square feet of ductwork surface area in the attic and a δt of 75 f the air coming out of the vents in your home will be significantly higher than 55 f. Meticulously seal seams and add reflective insulation around your ductwork convert your attic to a conditioned space.

The attic ductwork is flex duct work. Which direction is better. In all cases the ducting needs to conduct the exhaust to the building exterior and needs to terminate in an animal proof vent cover. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space.

Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water.