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Venting Options - Fireplaces

 


Gas Fireplaces

Hearth products are vented in three ways: natural draft (vented through the roof), direct-vent, and vent-free. Below are the options for gas hearth appliances.

Natural Draft (Class B) Venting

Natural draft hearth appliances take in combustion air from inside the home and vent products of combustion outside the home.

Direct Vent

Direct-vent appliances draw combustion air from the outdoors and exhaust its combustion products to the outdoors, eliminating the need for a standard chimney system. A glass panel in direct-vent units is critical to keeping the combustion system sealed from the home, maintaining high efficiency and indoor air quality. Direct-vent piping can go out the wall directly in back of the unit or go upward from the top of the appliance then though the wall or roof. Various models differ. Check with your retailer.

Currently, the majority of gas fireplace sales are direct vent units.

Unvented or Vent-Free

Unvented and vent-free refers to the kind of hearth appliance that draws its combustion air from inside the home.

Caution should be used in choosing a vent free fire place. Moisture content and other products of combustion can cause adverse effects on wall and ceiling finishes. Persons with respiratory problems and allergiess should avoid vent free appliances

 

Wood Burning Fireplaces

Wood burning fireplaces are naturally vented 3 feet above the roof of the house or a minimum of 2 feet above any point of the structure within a ten foot radius. Depending on the fireplace selected , this venting can occur through a masonry or stainless steel , Class A type all-fuel chimney system.

Fireplace Inserts

Fireplace inserts must be installed into and existing masonry fireplace or approved metal enclosure.

Fireplace inserts are either vented naturally through a working chimney, direct vented or vent-free depending on fuel choice. In all cases, a chimney liner is required. The type and size of the liner is specific to the fuel and fireplace type.

 

Venting Components

For gas fireplace inserts we stock high grade flexible aluminum liners and related termination components. For wood burning fireplace inserts we stock stainless steel chimney liners, insulation and termination components.

 

Termination Components

Woodburning Termination Caps



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