This highly effective heavy duty flue gas heat reclaimer has been designed for use with wood stoves and coal stoves. Most wood stove operators do not realize how much heat is lost up the chimney. High burning rates result in large losses. The HB2 Heat-Booster can capture most of the heat that is lost up the chimney. In fact, flue gases can be cooled to the point of water condensation. This often happens when green unseasoned wood is used in a smoldering fire. Wet fuel = water = low temperature = condensation. Do not use unseasoned wood with a Heat-Booster!
Chimney draft depends on flue gas temperature (warmer gases are lighter than air). Use a Draft-Booster to compensate for lower flue gas temperatures that result when a Heat-Booster is used.
Heat reclaimers should only be used with clean burning stoves and when seasoned wood is burned at medium to high rates. Older stoves that do not have a secondary air supply will foul the heat exchanger when operated at low fire. Clean burning requires excess air and high temperatures.
The Heat-Booster unit must be installed so that exit stove pipe can be removed to allow cleaning of heat exchanger tubes. A rod with an attached round metal brush works well for this purpose. A jointed rod can be used when available height is restricted.
Our experience is that the temperatures measured are very good indicators of re-fuelling times.
Note how much flue gases are cooled! - Cut wood consumption in half!