Gas Fireplaces: Gas is an excellent option for its ease of use and clean burning efficiency. Gas remains one of the most economical fuels available when comparing cost of transportation and time. The ease of use and availability of gas makes it an excellent option for any home. Gas also offers the benefit of instant, on demand heat. Optional remote controls, thermostat options and the variety of styles and finishes round out the versatility of a gas hearth appliance. Lisac’s offers the largest selection of premium gas appliances in the Northwest. What is a Zero-Clearance Gas Fireplace? These are built-in units, where no fireplace previously existed, that allows for very close clearances to combustible materials. The varieties of finishing possibilities and interior designs of a gas ZC fireplace are almost endless.