mross Posted October 3, 2016 Report Share Posted October 3, 2016 Most of the heat from a stove is spread by convection although radiant heat is significant if you are within about six to eight feet. When the fan is spinning rapidly, it means the stove is very hot, so it is not surprising that this coincides with the boat being warm. I think they are pretty but useless. Link to comment Share on other sites More sharing options...
ditchcrawler Posted October 3, 2016 Report Share Posted October 3, 2016 A poster on Facebook said a boater was selling them at £50 a time 1 Link to comment Share on other sites More sharing options...
Wanderer Vagabond Posted October 3, 2016 Report Share Posted October 3, 2016 Most of the heat from a stove is spread by convection although radiant heat is significant if you are within about six to eight feet. When the fan is spinning rapidly, it means the stove is very hot, so it is not surprising that this coincides with the boat being warm. I think they are pretty but useless. Therein lies something of the problem since the convection heat currents take the hot air to the ceiling of the boat where the ventilation mushrooms are, so there is little to stop the heat going straight out of the ventilator (I have visions of ducks crowding around my roof mushrooms during cold weather to enjoy the benefits of this ). I think the idea of the fans is to introduce a horizontal element to the movement of air rather than just the vertical movement whether it works or not (like I said I'm not bothered either way since I didn't buy the fan) our bedroom seems warmer when the fan has been running compared with when we have left the fan on the floor not operating. Interestingly they don't necessarily benefit from the stove being very hot since I think that is what knackered our fan, allowing it to get too hot. Since the replacement peltier unit was less than £3 (including carriage from China ) it didn't seem particularly onerous to repair the fan. Link to comment Share on other sites More sharing options...
mross Posted October 3, 2016 Report Share Posted October 3, 2016 Convection alone will spread the heat horizontally. If you screw the mushroom vents down they will trap hot air and lose very little energy. Link to comment Share on other sites More sharing options...
Wanderer Vagabond Posted October 3, 2016 Report Share Posted October 3, 2016 Convection alone will spread the heat horizontally. If you screw the mushroom vents down they will trap hot air and lose very little energy. Our Mushroom vents don't screw down, they just have a fixed setting. If they did screw down I would have done so and prevented the roof centre rope ripping one of them off (twice!!) Link to comment Share on other sites More sharing options...
MtB Posted October 4, 2016 Report Share Posted October 4, 2016 Most of the heat from a stove is spread by convection although radiant heat is significant if you are within about six to eight feet. When the fan is spinning rapidly, it means the stove is very hot, so it is not surprising that this coincides with the boat being warm. I think they are pretty but useless. Thus speaks a man who has never lived with one for a few weeks of cold weather! Link to comment Share on other sites More sharing options...
mross Posted October 4, 2016 Report Share Posted October 4, 2016 Thus speaks a man who has never lived with one for a few weeks of cold weather! Well,you are wrong, I have. Link to comment Share on other sites More sharing options...
MtB Posted October 4, 2016 Report Share Posted October 4, 2016 Well,you are wrong, I have. Did you try putting it on the stove? Link to comment Share on other sites More sharing options...
mross Posted October 4, 2016 Report Share Posted October 4, 2016 Out of interest, Mike, what model of fan do you have that causes such blind devotion ? Link to comment Share on other sites More sharing options...
Catnip King Posted October 4, 2016 Report Share Posted October 4, 2016 I like them. Would love a sterling one... if its no good to you i will happily take it from you Link to comment Share on other sites More sharing options...
Nightwatch Posted October 4, 2016 Report Share Posted October 4, 2016 Here we go! Differences of opinion escalates temperament. I have just bought one via Amazon. Awaiting delivery to my sons house in Hampshire, I'm in Lancashire. I doubt it will work from there,but we visiting sons (three in number) over the next month or so. Therefore we would have had the fire without fan,then we'll have the fire on with fan. It will be interesting to see how we get on. My view is it's worth less than £30 to find out. Martyn Link to comment Share on other sites More sharing options...
MtB Posted October 4, 2016 Report Share Posted October 4, 2016 Out of interest, Mike, what model of fan do you have that causes such blind devotion ? It's not blind devotion. I'm as skeptical as the next bloke where snake oil is concerned but mine all certainly make a difference to the comfort level in my boats. It's quite subtle so maybe you wouldn't notice. I have several models. My fave is the Sterling engine one. The electric ones are a bit annoying but they still have a effect. Best effect is the 'audible stove thermometer' effect. Even if they made no difference to heat distibution I'd still use them for this function. Link to comment Share on other sites More sharing options...
mross Posted October 4, 2016 Report Share Posted October 4, 2016 Mike, This is mine. Is yours the same? Link to comment Share on other sites More sharing options...
Wanderer Vagabond Posted October 4, 2016 Report Share Posted October 4, 2016 (edited) Mike, This is mine. Is yours the same? Interesting design, I can't say that I've seen one like that before. How do you get the temperature differential that causes the peltier unit to work without some form of cooling fins? (I'm assuming that the peltier unit is sandwiched at the bottom of the unit). Or perhaps I'm just not seeing the cooling fins Edited October 4, 2016 by Wanderer Vagabond Link to comment Share on other sites More sharing options...
MtB Posted October 4, 2016 Report Share Posted October 4, 2016 Interesting design, I can't say that I've seen one like that before. How do you get the temperature differential that causes the peltier unit to work without some form of cooling fins? (I'm assuming that the peltier unit is sandwiched at the bottom of the unit). Or perhaps I'm just not seeing the cooling fins Yes mine's the same. This a Sterling engine fan. No Peltier cell involved. 100% mechanical! Link to comment Share on other sites More sharing options...
Wanderer Vagabond Posted October 4, 2016 Report Share Posted October 4, 2016 Yes mine's the same. This a Sterling engine fan. No Peltier cell involved. 100% mechanical! That would explain everything Link to comment Share on other sites More sharing options...
mross Posted October 5, 2016 Report Share Posted October 5, 2016 Interesting design, I can't say that I've seen one like that before. How do you get the temperature differential that causes the peltier unit to work without some form of cooling fins? (I'm assuming that the peltier unit is sandwiched at the bottom of the unit). Or perhaps I'm just not seeing the cooling fins There are fins on it. Look here. http://www.kontax.co.uk/d.asp?product=VULCANSTOVEFAN I paid £97 for it!!!! Link to comment Share on other sites More sharing options...
MtB Posted October 5, 2016 Report Share Posted October 5, 2016 There are fins on it. Look here. http://www.kontax.co.uk/d.asp?product=VULCANSTOVEFAN I paid £97 for it!!!! I'll buy it from you if you want shot of it. I'll give you a tenner for it as it doesn't work! Link to comment Share on other sites More sharing options...
p6rob Posted October 5, 2016 Report Share Posted October 5, 2016 I'll buy it from you if you want shot of it. I'll give you a tenner for it as it doesn't work! I'll give you fifteen Link to comment Share on other sites More sharing options...
mross Posted October 5, 2016 Report Share Posted October 5, 2016 It's £155 new so I think mine is worth a lot more! It's very low mileage. Link to comment Share on other sites More sharing options...
MtB Posted October 5, 2016 Report Share Posted October 5, 2016 I'll give you fifteen I'll raise my offer to £15.01p Link to comment Share on other sites More sharing options...
p6rob Posted October 5, 2016 Report Share Posted October 5, 2016 I'll raise my offer to £15.01p Oi! Ok, I'll go to £15.50. 10% of the revised original purchase price for something that doesn't work... Link to comment Share on other sites More sharing options...
bigcol Posted October 15, 2016 Report Share Posted October 15, 2016 http://www.domu.co.uk/vonhaus-usb-stove-fan £27. have purchased some stuff from these before, seems to be decent quality for the price. i pulled the trigger, free delivery or £1 next day. Seems a nice fan,is that a red light that is powered by the fan. Looks a great deal Link to comment Share on other sites More sharing options...
Opener Posted October 15, 2016 Report Share Posted October 15, 2016 Seems a nice fan,is that a red light that is powered by the fan. Looks a great deal According to the destructions, it's an LED which indicates that the circuit is powered up and it varies in intensity according to current and, therefore presumably, stove temperature. When the body comes up to temperature (or when there is current via the USB input) it starts to glow. I'm guessing that when the glow of the LED is bright and visible from outside the boat it means that the stove is quite hot! Link to comment Share on other sites More sharing options...
rupertbear Posted October 3, 2017 Author Report Share Posted October 3, 2017 On 9/20/2016 at 19:15, rupertbear said: Aldi are selling a Stove Fan for £25 on Sunday 25th. I'll definitely try one at that price. It's come round again, so to speak, Thursday 5th. Link to comment Share on other sites More sharing options...
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