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A fireplace that doesn’t require a chimney is simply called a chimneyless fireplace. Don’t confuse these with ventless fireplaces, however. There are some fireplaces that require ventilation via a system of pipes, not a chimney. More specifically, the fireplace in question will likely be called by its name, such as electric, ethanol, or balanced flue.

Gas fireplaces usually last an average of 20 years, so anywhere from 15 to 25 years is standard in terms of lifespan. If your fireplace is 15 years or older, it might be a good idea to call a fireplace repair technician to inspect the unit and make any necessary repairs. Preemptive repairs will go a long way in extending the fireplace’s lifespan. You could get 30 or more years out of your gas fireplace if you keep up with maintenance and repairs.

Yes, you can install a liner in an old chimney that is in good working condition. In fact, it's often necessary for safety and efficiency. Older chimneys may lack liners or have deteriorated ones, leading to heat damage, gas leaks, or reduced performance. Installing a stainless steel, clay tile, or cast-in-place liner improves safety, protects the chimney’s structure, and boosts energy efficiency. This upgrade can extend the life span of an old chimney while meeting modern safety standards.

The time it takes for creosote to build up in a chimney can vary depending on how often you use your fireplace and the wood you burn. Creosote can start accumulating after just a few fires, especially if you burn unseasoned wood or allow fires to smolder. Regularly using the fireplace without proper maintenance can lead to significant creosote buildup within a few months. To prevent hazardous buildup, have your chimney inspected and cleaned at least once a year.