Gas fireplaces provide an excellent balance of performance, visual appeal, and convenience. This is because propane and natural gas, the two fuels available for gas fireplaces, produce flames that are as attractive as those generated by wood fires, but are cleaner and more efficient. You can also control the strength, color, and appearance of the fire with a remote control. Fireplaces that use gas also have many more installation and venting possibilities than wood burning models. If you choose to purchase a gas appliance you have a large number of direct vent, b-vent, natural vent, and vent-free styles to pick from.* Direct Vent Gas Fireplaces - This uses a coaxial pipe system (a fancy expression to explain a small pipe sitting within a larger pipe). The large outer pipe draws air from the outside to aid combustion, and the inner pipe vents the exhaust. A direct vent gas fireplace offers venting versatility, it is easy to install and it saves space. It also provides maximum warmth, making it ideal for newer or well-insulated homes with no chimney.