How to Install a Chimney Cap Fan How to Install a Chimney Cap Fan

What You'll Need
Chimney cap fan

A chimney cap fan is an essential item that prevents rain or moisture from seeping down to your fireplace or kitchen. It also prevents various rodents and birds from converting your chimney into warm nests. Professional installation could run into a few hundred dollars, but can follow the simple steps below you install a chimney cap in under two hours, saving up to $150 in the process.

Step 1: Deciding the Chimney Cap Type

Any hardware shop offers a wide range of chimney caps made of anything from stainless steel to black colored steel. They also come in a variety of sizes that are specified on their packaging. Choose a type that best suits your chimney requirements. Make it a point to put on gloves while fitting the cap, and also use safety goggles. Check if your chimney is a top mounted one, one with inside mounting or simply one with a single flue. All these types require separate modes of installation.

Step 2: Taking Measurements

Make sure that you correctly measure the chimney dimensions and submit the measurements at a building center. Get a spark arresting cap instead of a normal meshed type. This reduces the risks of chimney fires.

Step 3: Installation Type 1

If you have a chimney with a round flue, simply align the cap against the flue and sink in the screws tightly in the holed portions. Do not tighten the screws too much as it might lead to cracks in the flue. Check if any blocks are there in the air holes of the chimney. If so, clean them up.

Step 4: Installation Type 2

Another type of chimney might be the mount types with a tile or metal flue. In the former case, insert the cap inside the flue so that it fits in snugly. Use a sealing agent to seal up the gaps or joints. In the latter case, repeat the insertion method, but negate the sealing process as metal heats up and eventually spoils the sealer.

In case of a top mount chimney, align the cap against the crown of the chimney and displace the chimney flange to make it aligned with the crown. Now caulk the area linearly along the flange until it is an inch wide. Insert the flange into the adhesive bed. Alternatively, you could drill holes in the proper places after caulking the flange and then tighten the fan using screws.

Step 5: Finishing Touches

Installing a chimney fan is not the last step. After such an installation, you must check it at regular intervals and clean it, or else there could be increased risk of accidents. 

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