Pellet stoves are used as heat sources for homes. They work by burning biomass pallets, which might be composed of wood, sawdust, or food waste. The pellets are stored in the stove's hopper until the stove is ignited, at which point some are released into the stove's firebox to burn for heat. Unlike most fireplaces, pellet stoves have a thermostat that adjusts the temperature by releasing more or fewer pellets, depending on how warm you want to make your living space.

If you have a chimney, you need a flue or chimney cap. The right covering keeps rain, debris, and animals from getting into your flue or chimney and causing damage. A flue or chimney cap also provides fire protection. The mesh insert around the cap keeps sparks from flying out of the chimney and igniting leaves and other materials.

The easiest fireplace to build is an electric fireplace. These aren’t true fireplaces but can mimic the look of a traditional fireplace. True fireplaces, made of brick and stone, are complex and require professional installation; adding them to an existing home is demanding and expensive. You could spend $30,000 to have a real fireplace installed.

In short, yes, gas fireplaces create fewer pollutants and are considered more environmentally friendly than traditional ones. In general, natural gas fireplaces release only half to two-thirds as much CO2 per unit of heat (BTU) as burning wood. Plus, gas fireplaces emit fewer harmful particles and air pollutants. They can also be about three times as efficient as wood in terms of heating your home, resulting in a much higher level of their energy converting into heat.