[Closed] PSA To Stove heads cheapish stove top Fan

Bizzare, I was in the South Molton branch this lunchtime and picked one of those up, asked how much and thought it a bit expensive (even with my discount) and figured I'd build one myself, that said I have no idea how much these things cost! I'll probably go back and buy one now 😀

Still trying to work out why they are so expensive? Still it does make quite a difference to getting a more even heat from your stove

I've not used this model but I bought a stove top fan this week.

There's definitely a more even spread of heat in the room with the fan on.

Checked the prices online, Mole Valley Farmers are superb value, for pretty much everything! (thats where I recently bought my fridge/freezer from!)

I'll be buying one of those from them then 🙂

Any other stove fans which are good and links would be great too cheers 🙂

well i have the calframo ecofan but that mole valley one is a blatent copy. - bout 2/3rds of the price as well.

I made my stove Fan last winter, quite simple shed job, here is a pic if anyone wants to try.

[img] [/img]

great looking fan bone idle what pelitor unit/motor/fan did you use and where did you get them from?

Yeah, details please. That looks ace.

again, more details, I wanna build!!

This is odd as I was just thinking about building one of these.

Are you using the big steel base to lift the peliter element off of the stove to stop direct heat?

Is the copper pipe looped? Using a thermal syphon to circulate some coolent?

granny_ring - Member
Any other stove fans which are good and links would be great too cheers

I just bought one of [url= http://www.peakdistrictcreations.co.uk/members/look-creations/the-fan-c-recycled-stove-top-fan/ ]these[/url]:

[img] [/img]

I don't have enough clearance to fit an ecofan as the stove is in a fireplace.

So far it seems to work well. Maybe a bit more delicate than the ecofan

Interesting looks. The copper version looks like it came from a mad scientist's lab.

bone_idle - also interested in that build.
What motor/blade did you go for?

Here's mine. It needs a rebuild anyway as the thermal adhesive has come away from the heatsink on one side. So was thinking of changing the design. But dont know what motor/blade could be supported by the peltier.
[img] [/img]

I have done a short YouTube video so you can see how to make your own fan ,mines been going for a year now, hard part is making the fan.

The fan/heatsink that matthewjb linked is a Zalman CPU cooler (something like [url= http://www.quietpc.com/cnps9500a-led ]this[/url]) with peltier pump & a lump of metal at the bottom for the heat sink. Clearly the peltier pump he's using can drive one of those Zalman fans.

For me to make one of those, the hard part would be to fabricate the base heat sink. I'd have thought a wider metal disk would be better.

A nice thing with using CPU coolers, the fans are cheap & easy to replace.

Stoner it looks loke you may be able to get a motor and blade from here. No idea on price but it could be worth a call.

http://www.ecofan.co.uk/woodstove-ecofan-spares.html

Can anyone explain or link to an explanation of how these work?

YoK - a peltier device makes use of a thermoelectric effect. When there is sufficient heat differential between two sides of an array of semiconductors a current is induced between them. That current is then used to power a fan - the fan draws cooler air from above and behind the stove to cool the heatsink that is thermal glued to the top of the peltier so maintain a temperature differential (otherwise the top of the peltier would heat up and with no differential between top and bottom the current falls away)

This effect also works in reverse in that you can induce a temperature differential by passing a current across the semiconductor material - which is how cheap cool boxes or USB Mug warmers work.

http://en.wikipedia.org/wiki/Thermoelectric_effect

thats not a bad idea rusty - I could get a blade and motor from here for about £30
http://www.thestovecompany.co.uk/index.php?main_page=index&cPath=7_107&zenid=ah3762t1gbj3bi0m59k9ptgbm4

or just the motor and fabricate my own blade. But getting the pitch right Im sure is pretty critical.