The typical range for chimney cap costs is $75 to $1,000 with a national average of $300. Cost factors for chimney cap installation can include material, size, shape, type, labor, and seasonality.

Q. We had a chimney cleaning service inspect our chimney and they suggested that we install an insulated flexible aluminum flue liner in our chimney connected directly to our gas water heater vent.

That new high-efficiency furnace you’re installing might come at a high price: a buildup of carbon monoxide around the water heater or condensation in the chimney. The source of the problem is what ...