| Green Home Guidelines The National Association of Home Builders recommends the installation of direct-vent sealed combustion gas fireplaces when installing new gas burning units. This type of unit will minimize the risk of smoke and combustion byproducts back-drafting into the home. Direct-vent gas fireplaces are more energy-efficient than vent-free units as they use outside air for combustion and exhaust directly to the outside. As you browse our products, look for the eco-friendly seal. If you see it, this means that particular model meets the NAHB Green Home Building Standards, is EPA-certified, or meets the Energy Star® Indoor Air Package Specification Guidelines. |