How To Install Kitchen Exhaust Fan Ducting

The duct for your exhaust fan needs to be run to the outside of the house to remove the chance of a fire hazard.

How to install kitchen exhaust fan ducting.

As a general rule of thumb take the square footage of your kitchen and double that amount to determine the cfm you ll need. Step 2 run the ducts your vent hood will have places available for either attic or wall exhaust. A ducted kitchen exhaust fan draws air from your kitchen through a duct and releases it outside. Measure the duct opening size on top of your kitchen exhaust fan.

Ceiling mounted fans typically use ducts hidden in the walls ceiling or attic to reach a safe exit point on the roof or a wall. An exhaust fan replacement is fairly straightforward since the existing wiring and duct work can often be utilized. Ideally the new hood should be large enough to extend one inch past the stovetop on all four. Attach all ductwork then go up to the attic and reposition the plumb bob so it drops straight into the middle of the pipe coming up from the kitchen.

Ducted kitchen exhaust fans. Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. Locate the fan as close as possible to the area it will be serving in order to limit any long or twisted duct runs. Installing a range hood in the kitchen for the first time involves drilling a hole in the wall attaching new duct work and adding new wiring if necessary.

The fan discharge should be located at least 10 feet away from any supply intakes. Some connections will be square and some round. Most newer homes are constructed with a range hood already built in over the stove but for an older home that might not have one or in the event that the hood does do enough to ventilate your kitchen you may need to know how to install. Exhaust fans mounted on an exterior wall vent directly outside without any ductwork required.

The next step in installing your restaurant kitchen exhaust fan is to select and prepare the site where you will install it. Cut the hole for the duct attach it then install the roof cap. The ducting is always 6 or 7 inch round stock. Begin by unpacking the unit and removing the filter exhaust fan and electrical housing cover.

Range hoods are measured by cubic feet per minute cfm which measures how much air moves from the inside to the outside. Use a measuring tape. If you live in an area where frost occurs add an insulated duct sleeve to the portion of pipe in the attic. A kitchen exhaust fan can be very useful and effective in getting rid of smoke moist air and unpleasant smells that are produced when using your stove top.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. You can find 4 in.