Requires 3 inch diameter chimney parts. Minimum 4ft or maximum 8ft of chimney is required, a 6ft straight run with no elbows work best Chimneys 6ft or longer we highly recommend a barometric damper Permanent fresh air vent needed in area of the unit Dickinson Marine, Newport Solid Fuel (Wood) Heater 00-NEWSF is a small, solid fuel heater. Designed for casual use but built of stainless steel for years of service. It is ideal for boats 20-25 ft in length and tiny homes or fishing huts. The Newport Solid Fuel (Wood) Heater burns one to two 1" thick wood or presto log, a handful of charcoal briquettes or coal. Removable ash drawer and damper control. Combustion options for this appliance are wood, charcoal briquettes or similar solid fuels that can be burned. Slow burning fuels are recommended. Care must be taken not to overfill the combustion chamber as this can damage the heater. The heater is rated for approximately 8000 btuÍs. This will be equal to a small handful of briquettes, 1 or 2 slices of presto logs at 1" thick or equivalent sizing for wood or other solid fuels. Certain brands of engineered firewood can burn with an enhanced level of heat so caution must be used. Refrain from burning any manufactured wood with an artificially increased btu rating. When using engineered firewood, cleaning of the firebox and exhaust chimney may be required. Requires 3" diameter chimney parts Minimum 4ft of chimney is required, a 6ft straight run with no elbows work best Chimneys 6ft or longer we highly recommend a barometric damper Permanent fresh air vent needed in area of the unit Decorative laser cut door Creates a dry heat to dry out moisture inside the vessel Removable ash drawer for easy cleaning & damper control Increasingly used as a wood stove / heater in non-marine applications such as tiny homes. Check with local codes before purchase Dimensions: Width: 7.88" x Height: 14.7" x Depth: 10" Weight: 15 lbs Heat Output (aprox): Low - 3000 BTU / High - 8000 BTU