Chimney fan installation problems
There are a few common issues when installing a chimney fan. Many times, installing this device will just cover a problem rather than solve it. You must choose the right type, size and style that will suit your chimney.
You may be able to solve the chimney draft issues without installing a chimney fan. Try installing a chimney cap first and see if it solves the problem. If not, try adding a stainless steel air vent to the fireplace. If the draft issues persists, you can either rebuild the chimney or install a chimney fan, depending which is cheaper.
A common mistake is choosing the right type of fan. Try to purchase a fan that requires a 110 volt circuit rather than a 220 volt circuit. Make sure it is made to resist high temperatures. A clay tile chimney flue must be cut to level with the chimney crown if it sticks out. Choose a fan that can be easily inspected. Also, make sure the chimney can withstand the weight of the fan. Seek to install a support flange or an adapter, depending on the number of flues your chimney has.
Install a junction box with a capacitor on the outside of the chimney. The fan must always function when the fire is burning in the fireplace.