An adjustable barometric damper should be installed on all diesel or solid fuel heaters and stoves, and is especially recommended when the stove flue pipe is over 5 or 6 ft long - a situation where excessive draft is likely to be a constant problem. The barometric damper helps decrease the draft on longer chimneys allowing the user to operate the unit at lower fuel settings - saving heat, fuel, and money.

This particular damper is installed in a standard length (24") piece of flue pipe with a 1" crimp at one end for making connections. It is designed to be installed as the first section of flue pipe attached to yuor heater or diesel stove. This places the damper at the ideal location of 12" - 20" above the heater.