Mine does help a bit but far more successful is a pedestal fan. Or a desktop one. Really pulls or pushes the hot air into the room. Just turn it off when putting wood in
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gaz1
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yes they blow air out from any stove pushing it into the room the stove does this anyway within reason but the fans push air even faster which in turn warms the place up much faster
the stove fans also dosnt cost anything to run other than buying them but there is cheap times to buy them
Wildefalcon
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I point mine at the flue, from the side, I figure that it's better to have cooler air flowing over the fan motor. It drives the hot air out from the nook and into the room. Makes a big difference in smaller rooms.
I have a fan assisted barbecue and it really heats up quickly when the little tiny fan runs.
gaz1
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they do work without costing the owner any electric
as goes for there thermodynamics they do use it rather well they push heated air from around the stove into a larger room therefore warming the room up far faster
im one of these that like thermal dynamics that dosnt cost the owner to heat a room up and therefore i would be using tubes or box section around the stove to further improve this effect the same can be said for the chimneys heat exchanger
the fans are just a lower cost in spreading the heat around a room much faster
the rocket stove with tubes within it also use the same thermal dynamics instead of power being used to heat the room the said tubes slowly push heat upwards therefore spreading eat into the room much faster than just a standared stove
MattF
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That's not supposed to be done. You want the flue gases to remain as warm as possible, within reason.
MattF
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Without figures to back it up, that's merely opinion.
Gareth J
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Explain how.
I.e, why do they transfer heat more effectively than relying on convection/radiation alone?
In theory, they could cool the exhaust a small amount more than if you didn't have one. That shouldn't be necessary for a wood burner operating correctly. Could even be detrimental. It could, potentially, allow you to run an undersized wood burner hotter than it's most efficient setting. In theory.
You won't extract any extra heat from the wood or coal burning but you will lose less heat up the chimney. Also it depends on the woodburner location. If against an outside wall you will reduce the amount of heat soaking into the wall and reduce the amount radiating outside.
In my house an extended conservatory was added years ago. The woodburner is double ended. Placing a pedestal fan on the conservatory side makes a massive difference.
Only thing to watch is the glass that side soots up as it cools down too much.
gaz1
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all stoves are built basic 4 walls if they are fitted with convection sides they are improving the flow of air being put into the room from the stoves via convection
this stove uses the same principle take note of the air convection slots 6 in total
for all the heat that is lost up a chimney and you lose loads as a basic stove is still outputting 1000f+ up a chimney fitting a heat exchanger on the flue adds more heat into a room that would be normally lost
whilst a fan on top of the stove collects air from above the stove one of the most hotest places blowing this heat further into a room central heating rads use this aproach your more than welcome to try a fan on a rad it will have the same effect whilst the rad has fins the fan just blows the heat from the top of the rad instead of using convection of the radiator fins
if you was to fit an encloser above the stove you would find the air being pushed out by the stove fan is considerably more hotter
whilst the rocket stoves heat tubes use convection like the radiators
Farside
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In a small space, like the lounge of a narrowboat, yes.
addjunkie
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This is our method too, leave door open to heat the rest of the house with the little fan
Gareth J
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Cooling flue gasses below the point at which volatiles can condense back out is bad practice and leads to chimney fires. If fans are effective at cooling chimney gasses significantly, they shouldn't be used unless you're already running the stove hotter than it's most efficient. If they're ineffective, fine, but they're ineffective. Maybe they have a place where you have undersized a stove for a space so are having to run it hotter than it is designed to operate efficiently at and a fan (or 5) allows you to bring excessive exhaust temps back down a bit. Possibly.
(I know rocket stoves operate differently and flue gasses are safer to cool further but that's not what's being discussed)
julianthegypsy
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Someone I know on a narrow boat says they're brilliant. Don't move heat significantly but if she's cooking at one end of the boat and the fan slows down she can see it's time to put another log on the stove!
gaz1
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you are correct but many think lowering it way too low is good practice on normal stoves
whilst i also agree sending 1000f+ up a chimney is kinda really wasteful even if that amount can be lowered down to 500f going up the flue is far better
even the new dual fire stoves are still outputting silly amounts up a chimney and that includes zeros twinfire stoves
just to be clear here rocket stoves are finer particles ive also recorded 300f going up a chimney a stainless steel chimney
roofman
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This winters log collecting which i normaly do during summer to get best prices has bit me on the arrse...selling my house and i thought i would be out for the winter, but like every house sale it has stalled to a walking pace 
looks like ime here now till new year with no wood stocks and half my furniture in my other home. better start looking for crated logs before my wife thinks ime a waste of a man not keeping her warm and fed.
looks like ime here now till new year with no wood stocks and half my furniture in my other home. better start looking for crated logs before my wife thinks ime a waste of a man not keeping her warm and fed. Dessieb2022
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We had an insert wood burner with built in convection system, what a waste of time and money. Had it fitted for 2 years, had it removed last month and back to using open coal fire with overnight burning fire front. At least double the heat, and chimney breast is still warm the morning after. Costs more for fuel, but definitely worth it heat wise.
I instantly regretted having the wood burner fitted, very happy now to be back to open fire... And no glass to keep clean.
I instantly regretted having the wood burner fitted, very happy now to be back to open fire... And no glass to keep clean.
