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To reduce the risk of injury user must read instruction manuals for all tools used in this project. Wear eye and respiratory protection. Use clamps to support work piece whenever practical.
Here we have chosen to rout the vent through an exterior wall. You may find it easier to run the vent through the roof. Mark the area you need to remove above your stove. Your hood may have come with a template for this. If not, hold your hood up to where it will be mounted and trace the area of your wall and trace inside the cut-out area intended for the vent. SAFETY TIP: Make sure you’re clear of electric and gas line before cutting the drywall.
Next, cut around the area you just outlined with a Multi-Max tool and an MM452 Wood/Drywall & Metal Saw Blade. Once your cut is complete, remove the cut drywall and underlying insulation to expose the exterior wall. SAFETY TIP: Exercise caution when working with insulation and seek help if you have questions about safe handling measures.
It is easiest to cut the exterior wall from outside. Locate your cut on the exterior wall by drilling holes in the corners of the vent hole from the inside. Ensure there is nothing on the outside of the house that you could hit with your drill before getting started. Once you are ready to cut use the Dremel Multi-Max tool with the MM452 Blade once again. Cutting thick exterior wall substrate can be challenging.
Measure the length of vent you need to run. You may find that you need to cut the vent to length. This is easy with a Dremel SM20 mounted with an SM510C Metal Cut-Off Wheel. Mark your length of cut and work the tool slowly through the material. SAFETY TIP: Always wear gloves when cutting through metal.
With the vent hole complete, finish installing vent hardware and exhaust fan. Install flashings and caulk on the exterior of the vent to seal against moisture. SAFETY TIP: Adhere to local codes and take all necessary safety precautions when wiring your new range hood.
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