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The biggest disadvantage of propane is that heating systems and appliances powered by propane tend to cost more than gas-powered ones. Propane is also dangerous since it can create frostbite if it touches the skin and can easily combust if mishandled. It’s also quite cumbersome to buy or replace propane tanks, so many people choose to have propane delivered to their homes—an extra cost and logistical challenge that can be a headache.

For one, natural gas is more affordable than electricity, meaning your wallet might see an overall savings over time. The biggest positive of installing a gas line is that gas-powered appliances will still work during a power outage, so your gas fireplace will keep your home warm and toasty during a blackout. 

A plumber or certified gas technician is responsible for capping gas lines. Gas lines require expertise and understanding of safety standards to ensure it’s properly sealed. Your local regulations may also have specific requirements for capping gas lines.

Not all gas fireplaces need a chimney. If you install a ventless gas fireplace, it will release low levels of combustion byproducts back into your living space (instead of pushing them outside through a chimney or vent). Ventless fireplaces burn fuel efficiently, so the emissions are minimal—but they could bother people with allergies or respiratory issues.