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If your chimney doesn't have a damper, you are reducing your home's energy efficiency while allowing drafts, debris, and even animals to enter your home. Remember, installing a damper helps regulate airflow, keeping warm air inside during winter and preventing cooled air from escaping in the summer. It also acts as a barrier to keep out moisture and critters.

In homes that have a gas furnace, it's typically the heating system that uses the most gas. That explains why your gas bill is almost always higher in the winter and other colder months than it is in the summer. Other appliances that may use gas include your water heater, clothes dryer, and stove.

The answer can vary widely based on a home's age and design. As with any type of remodeling project, assume that every structure is load-bearing until confirming otherwise with a structural engineer. Almost all modern homes have chimneys that are fully independent from the rest of the home's framing. As a result, they don't bear any load beyond their own weight. However, many historic homes built prior to the 1900s contain load-bearing chimneys that tie into the surrounding roof and floor joists. If possible, use a home's blueprints or look for chimney connections that indicate load-bearing qualities to get your answer.

Whether or not it’s cheaper to build a pizza oven depends largely on what style you opt for and which tools and materials you already have. For example, having a surplus of leftover fire bricks from another DIY project will reduce the amount you need to build a new pizza oven and cut costs to boot. On the flip side, if you don’t have any of the required materials, buying a pre-made option will be cheaper and require far less work to set up—between just $300 and $1,000 for the best versions.