Most common household kitchens come equipped with a ventilation fan. One of the most efficient ventilation systems on the market is an oven range hood. An oven hood is placed above the hob so that its fan can suck in hot air, smoke, and cooking fumes. The fan can then either send the air through a filter and then back into the kitchen or it can filter it and send it out of the house through a ventilation duct.
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Things you need
- 2 people
- Oven hood
- Socket wrench
- Screw driver
- 3/8-inch spade or masonry bit
- Drywall saw
- Tape measure
- Duct tape
- Silicone caulk
- Extension shaft
- 14-2 NM cable
- Wall cap
- Extension cord
- Insulated electrical staples
- Plastic wire nuts
Turn the oven hood upside down. Using a wrench or screw driver, remove the bottom cover and filter. Then hammer out the knockout holes that you wish to use for ventilation and the electrical wiring.
Screw the duct connector-damper into the range hood, making sure that the opening gives you enough room to move it side to side when fitting it in the wall.
Measure 24 inches up from the hob and then mark off a line with a pencil. This is where the bottom of the hood will go. Using the pencil mark as a guide, have a second person hold the range hood up against the wall where you wish to install it. Use a level to ensure that the duct opening is straight, then trace on the wall around the duct opening with a pencil to make a cutting guide.
Turn off all power to the kitchen by turning off the circuit switch at the house's breaker box.
Cut out the area you marked on the wall where the ventilation duct will go, using the drywall saw. Place a masonry bit on the power drill, then place the drill in each of the corners of the opening you just made and drill a hole, making sure that the holes reach through the masonry and siding on the outside of the building.
Connect the holes you drilled on the outside of the house, using a pencil, to make a cutting guide line.
Cut the lines with the jigsaw, going from one hole to the next to make a space for the duct to fit in the wall. After you have completely cut out the opening, test to see if the wall cap will reach the range hood by setting it in the hole you just made. You may have to purchase a piece of extension ducting to get it to reach.
Apply the silicone caulk to the bottom of the wall cap and then slide the wall cap through the outer wall and fit it into the duct connector-damper. Next, place duct tape around the fitted parts to seal them off. When you are finished, screw the wall cap into the exterior siding.
Protect yourself by double-checking that the power is turned off in the area you are working before you start this step.
Using a drill, bore holes in the wall studs where you need to run your wiring. Connect one end of the 14-2 NM power cable to the closest junction box or receptacle in the house. Take the loose end of the cable and run it to the hole you cut in the wall. Fasten the wiring in place by hammering the insulated electrical staples into the studs. Next, fish the power cable through the wall to the area where the oven hood is going to be mounted. Once it is in place, take the end of the cable and strip the cable's sheath, then clamp it to the hood's electrical knockout. You may have to install a cable clamp into one of the hood's knock out holes in order to do this part of the step.
With another person holding the oven range hood up, screw it to the underside of the cabinets to mount it securely above the stove. Take the ground wire and wrap its end around the green screw on the hood frame and screw it into place. Twist the two black wires together and screw a plastic wire nut on them, then repeat this process with the two white wires.
Bend the wires into place and screw the hood cover back on. Place the filters into their correct spots and screw in any light bulbs in the hood. Finally, turn on the electrical power to test the oven hood's fan and light to finish the job.
Tips and warnings
- If the cabinets above the hob where the range hood is to be installed is made out of inferior thin particle board, you may have to install wood bracing in order to give the hood a strong base to hang from.
- This article gives directions on placing an oven hood over an oven that is positioned directly against a wall that leads to the outside. If you wish to make ducting for an oven against a wall that is not against a side of the house, you may wish to contact a contractor so that the job is done correctly.
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