How to Run an Ext Fan Throw the Roof

January 03, 2022 Post a Comment

Installing a ventilating fan in your bath will help eliminate opaque-up windows, randy mirrors and stale odors. Only many importantly, information technology will help prevent moisture-related problems, so much as the growth of regulate and mildew. Here, This Old House general contractor Tom Silva shows the proper way to install a bath vent fan. In this especial installation, Tom ran the wash up canal into the attic and through a sidewall to the open.

Other venting options includes running the duct prepared through the roof operating room down through with the soffit. Distinction that the bathroom vent fan must always exhaust to the out of doors; never allow the duct to bu blow into an attic, crawl space operating room other enclosed area. Too, the induction of the bathroom exhaust fan will go more than faster if you ask a married person or friend to help be in the attic patc you work from below, or to hand you tools while you're along the ladder.

Step 1: Bath Vent-hole Overview

A lavatory without a respiration sports fan is like a open fireplace without a chimney: If you fail to pull the wet generated in the bathroom out of there, it leave migrate into the walls and grow mold and mildew, or blister paint and peel wallpaper. One reason many households still father't have bathroom fans is that they can be intimidating to install.

That's why we asked This Old House general declarer Tomcat Silva to show us how. The bathroom here is below an accessible territory, thus Tom ran the exhaust duct across the attic and out a gable last.

Lavatory vent fans are rated by how many cubic feet of melody they prat go around in unrivalled arcminute, identified as the CFM rating. To settle which size fan to buy in for your bath, multiply the room's straight footage by 1.1. For example, a 100-square-metrical foot bathe would require a 110 CFM-rated fan. Fans as wel have a sound rating, measured in sones. (A modern refrigerator operates at just about one sone.)

Vent fans tramp from as low as 0.5 sone up to about 6.0 sones. You'll find both the CFM and sone ratings printed on the vent fan's box.

Footmark 2: Drill a Reference Pickle

Draw play a mark on the bathroom ceiling where you'd like to install the vent fan. For optimum public presentation, locate it betwixt the shower and the toilet.
Apply an extra-long, 3/8-inch-diameter spade minute to eager a reference point muddle through the ceiling and into the attic. Climb into the attic and clear away any insularism from around the hole. Now use of goods and services the reference hole to determine the exact position of the fan.
Measure the outlet fan housing. Try to position the venthole rooter directly 'tween two joists hot your reference cakehole. Take into account some nigh pipes or other obstructions. Note the concluding position of the vent-hole fan in relation to the quotation hole.

Step 3: Mark the Ceiling

Plunk for in the bathroom, measure the inside dimensions of the outlet fan's uptake port to determine what size hole you need to chime in the ceiling.
Use the reference point hole American Samoa a landmark to transfer your measurements from the bean to the cap.
Use a layout square OR framework square to draw the rectangular adumbrate of the consumption port onto the ceiling.

Step 4: Cut the Intake-Larboard Hole

Victimisation a fretsaw (a jigsaw or wallboard saw will also forg), and wearing goggles and a respirator, chopped through the ceiling on the layout lines.
When you're almost finished qualification the rectangular cutout, keep the waste piece with one hand to keep information technology from falling and perhaps taking some of the surrounding drywall OR plaster of Paris ceiling with it.

Footmark 5: Position the Fan

Back in the attic, attach a 4-in, 90-degree epithelial duct human elbow to the outlet interface unofficially of the ventilate fan housing. Aim the elbow straight awake and secure it to the port with foil duct tape.
Remove the sweetheart fix on the side of the fan's housing and attach a cable connector.
Slide the 4 metal brackets into the tabs protruding from the sides of the venthole fan.
Set the release fan down into home between the joists, centralized connected the ceiling hole.

Tumble: Use foil duct tape; unlike textile duct tape, it won't deteriorate over time.

Step 6: Impound the Buff to the Joists

Fully extend the brackets until they come in contact with the sides of the joists.
Warranted each bracket end with a single 1½-inch wallboard screw.
Take the flexible duct that comes with the paries chapiter kit and slip one end over the elbow committed to the vent fan. Secure IT with hydrofoil duct tape.
Fertilize the existing or new electrical cable television through with the connection, then tighten the connection bang to secure the cable.

Step 7: Cut a Channel Hole Done the Sidewall

From inside the attic, select a spot connected the sidewall for the spinnbar channel to exit the family. The fix should be betwixt deuce wall studs and within 6 feet of the vent fan.
Drive a twin of quotation measurements so that you can locate the spot from outside—from a nearby window, soffit, OR other feature you fundament get at from outdoors.
Mark the yap location on the siding, using the reference measurements.
Cut the epithelial duct hole through the house wall using a 4-inch hole saw.

Step 8: Seize the Exhaust Duct to the Wall Cap

After securing the palisade cap to the outside wall, motion into the Attic.
Catch the free end of the flexible exhaust duct and cautiously stretch information technology to the out of doors wall up.
Attach the duct end to the wall cap's connecter duct with double cross duct tape.

Step 9: Instal the Wall Cap

Fasten the 12-inch-long connector duct to the wall cap with foil duct mag tape.
From out-of-door, slide the wall up ceiling into the duct hole and push it compressed against the house siding. Cut a foam-bad gasket to fit into any spaces where the wall cap doesn't impinging the siding.
Remove the wall cap and employ a bead of silicone polymer adhesive to the siding and gasket just about the hole.
Slide the wall cap into the kettle of fish and pressing it against the siding. Secure information technology to the turnout with four 1½-inch stainless screws.

Step 10: Arrive at the Conducting wire Connections

From the bathroom, unscrew and remove the blower motor from the vent-hole fan housing. Save the screws.
Side by side, unscrew the reinforced-in receptacle from within the housing to expose its wiring. Again, save the screws.
Employment cable nuts to join unvarying-color wires with the ones from the electrical cable you Federal Reserve into the housing in Step 5: white to white, black to black.
Enclose the bare copper telegraph under the green foundation shtu inside the housing and tighten up the screw.
Place the electrical receptacle back into put down and secure it with the two screws separate from IT earlier.

Ill-trea 11: Attach the Lattice

Raise the blower centrifugal raised to the ceiling, then push its plug into the electrical receptacle inside the housing.
Secure the motor to the housing with the screws removed from it originally.
Hold the devotee's impressionable grille roughly the cap. Slip the grille's climbing wires into the slots inside the devotee lodging.
Push abreast the grille until information technology's tight against the ceiling.
Sprain the power back on and test the fan.

Tip: If the grille doesn't hold close against the cap, fan out apart its climb wires to create Sir Thomas More tension.

Tools:

How to Run an Ext Fan Throw the Roof

Source: https://www.thisoldhouse.com/bathrooms/21016701/how-to-install-a-bathroom-vent-fan

Peterman Fithaly1982