Metal-Fab Premium Biomass 4" Standard Stove Adapter w31 The fireplace spills due to

The fireplace spills due to negative pressure in the house

Maximum Opening Size - 42" W x 37 3/8" H

you can also set a timer off interval

Platinum Gas Spec Sheet

Painted Trim Sleeve

Metal-Fab Premium Biomass 4" Standard Stove Adapter w31 The fireplace spills due toPremium Biomass factory built vent intended for use with Biomass fuel appliances approved for Type L low temperature venting systems in accordance with Standard for Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances, NFPA 211, and the International Mechanical Code. Tested and listed to UL 641, Premium Pellet Vent features a super ferritic corrosion resistant 444 stainless flue designed to operate in highly corrosive biofuel applications.