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A chimney cap costs about $300 on average. The prices range from about $75 to $1,000, depending on the material, size, any repairs needed, and if your chimney cap requires custom fabrication. Chimney caps are usually made from galvanized steel, copper, or stainless steel. Additional costs may include hiring a chimney sweep to clean the chimney before a cap is installed. 

When your fireplace is not in use for longer periods of time, such as over the summer, you can keep smells at bay by spraying either a commercial fireplace deodorizing product or a blend of one part distilled white vinegar to one part water around the walls of the fireplace. 

Or, you can place a container of charcoal inside the fireplace to absorb odors. Just be sure to remove it before it’s time to start using the fireplace again.

No, a chimney crown is not the same as a chimney cap. A chimney crown is a flat cement area on top of a masonry chimney. It starts where the masonry part of the chimney ends at the very top and domes upward toward the flue opening. A chimney cap sits on top of the crown over the flue. It is usually made of metal and allows smoke to escape without letting in rainwater.

The cost difference between a gas fireplace and a wood-burning fireplace depends on the type of wood-burning fireplace installed. The cost to install a gas fireplace tends to be cheaper than the cost to install a brick wood-burning fireplace. Installing a gas fireplace costs about $3,600 on average, whereas the cost to build a masonry wood-burning fireplace can go up to $30,000. The cost to install a wood-burning fireplace insert or stove can cost from $700 to $6,500, about the same as a gas fireplace on average.