If the stove starts to whuff, open the draft control a bit to supply more air to the fire for a few minutes, then resume your gradual reduction of combustion air until you reach your all-night burn setting. Adjust your draft control to, say, half throttle (you’ll have to experiment a bit to find the setting that works best for you), for a few minutes, then continue to turn it down in gradual stages, so the fire can quench down slowly. Whenever you’ve had a hot fire going and want to “bank” it down for the night, care must be taken not to cut down the air supply too suddenly. In extreme cases, these repeated explosions can cause the stove to actually move around on the hearth!Īlthough whuffing usually only occurs for a short time (until the starved-for-air fire dies down, reducing the vacuum effect), it should be avoided, as the repeated pressurization inside the stove caused by the mini-explosions could fill the house with smoke, blow the door open, disconnect the exhaust pipe, or damage the stove. We call this “whuffing”, due to the usual accompanying sound of muffled explosions. This brief period of pressurization is followed immediately by extreme depressurization, as the explosion consumes all the available oxygen, and another gulp of air is pulled down the chimney, causing the process to repeat. Replacement wood circulator draft control damper, part number 23476. All US Stove Company Us Stove Wood Furnace. Magnolia Wood Stove American Harvest Pellet Stoves US Stove Company. When this pocket of air hits the fire, a mini-explosion occurs, and the resulting sudden extreme pressurization inside the firebox forces smoke out through the draft control, door gasketing and other tiny openings that exist in even the most “airtight” woodstoves. Country Hearth Wood Stoves: Efficient, Easy, an. If strong enough, this vacuum will sometimes reverse the flow inside the chimney, pulling a “gulp” of air back down the flue into the firebox. If you cut down the supply of air too abruptly, the fire instantly consumes the available air, creating a powerful vacuum inside the stove. When you have a rip-roaring woodstove fire going, and a chimney charged with rising superheated exhaust gases, the air flow through the firebox is considerable. Specially designed heat resistant, radial type blower. Will the flue solve the puff-back problem?Ī: Chances are your back-puffing episodes aren’t being caused entirely by the lack of a properly sized flue, although the extreme updraft that can be created by an oversized flue could certainly be a contributing factor. Encourages complete utilization of fuel, leaving a fine ash. Requires special attention for good draft control.
The chimney is very tall and oversized for the stove. Wood stoves that do not have a label indicating that they have been tested and approved by.
Q: Last year I was experiencing puff-backs, particularly on cold evenings, when I set back the fire unit for the evening.
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