Clearance Gas Fireplace Venting Requirements

Gas fireplace ventilation options there are three venting options available for gas fireplace installations.

Clearance gas fireplace venting requirements.

The minimum clearance to a perpendicular wall. Natural vent often called b vent utilizes an existing masonry chimney or a factory. This gas fireplace and vent assembly must be vented directly to the outside and must never be attached to a chimney serving a separate solid fuel burning appliance. It typically has a 1 inch clearance when it is run vertically but when it is run horizontally the clearance requirements vary.

Vent free hearth products can be installed without venting up a chimney or to the exterior of the house. On 2020 01 04 by mod b vent clearance to combustibles. Vented gas fireplaces. Vent pipe for a direct gas fireplace is unique.

Gas fireplaces are a convenient heat source that is efficient and easy to use. For most wood burning fireplaces with a single venting system the choice is simple. Ideally you d want to route the vent pipe to the corner of a room or in a closet to avoid its visibility. Like all fireplaces that give off heat there are code requirements that have to be met especially for the hearth.

Class a chimney usually has a 2 inch clearance to combustibles and a type b gas vent normally has 1 inch clearance. Ventless gas fireplaces differ from vented gas fireplaces in terms of the logs flame pattern and method of venting. With vented fireplaces the flames can run through around and over the logs creating a more chaotic and realistic appearance. And space requirements clearance requirements the top back and sides of the fireplace are defined by stand offs.

According to fireplaces now 45 million homes worldwide and more than 8 million american homes enjoy the comfort and convenience of vent free gas fireplaces. This article gives typical clearance distance requirements between the termination cap of a gas fireplace or fireplace insert and other building or site features such as windows doors other mechanical system components air intakes. Gas fireplace direct vent termination cap clearance distances clearances between the gas fireplace exhaust vent and other building components or features. Energy star boasts that some gas fireplace units are at over 90 percent efficiency with little extra costs to operate.

With the vent route and appliance selected check your list of venting components. Can cga 2 17 m91 and ansi z21 88 2009 csa 2 33 2009.