Eco Fan

[IanD]

12 minutes ago, Tony Brooks said:

Well, the motor and wiring will use some of the current to produce heat, as will friction in the bearings. The fan will move some air so the air will have kinetic energy that will eventually be dissipated by friction between air molecules as heat so I think  Ian is correct, but as you say an interesting idea.

Hence the eventual heat death of the universe -- to quote Flanders and Swann, "That's entropy, man!" 😉

[cuthound]

On 08/12/2021 at 13:37, Alway Swilby said:

I don't particularly care about any scientific tests to prove whether a stove top fan works or not. IanD can go on about it all he likes about placebos etc. but I know that without a fan on the fire my feet get cold when I'm sitting on the sofa. With a £20 fan on the fire my feet don't get cold. Worth it in my book even if they're proven by science not to work.

 

You can quite a few pairs of socks for £20, just saying... 😉🤣

[cuthound]

On 08/12/2021 at 16:25, tree monkey said:

Welcome to the forum 

 

It's just banter, although Ian does take it very seriously, he does so love to be right

if you want to see real bickering start a toilet thread 

 

Oh and no they don't work

 

Really? I hadn't noticed... 😉🤣

[TheBiscuits]

9 minutes ago, cuthound said:

 

Really? I hadn't noticed... 😉🤣

 

That proves you haven't been paying enough attention to what he writes.  

[ditchcrawler]

21 minutes ago, TheBiscuits said:

 

That proves you haven't been paying enough attention to what he writes.  

Now why would that be?

[IanD]

2 hours ago, ditchcrawler said:

Now why would that be?

Because you value opinions over facts? 😉

[ditchcrawler]

This set up looks better than a fan for moving the air, not sure what a BSS chap would say 

 

 

[IanD]

1 minute ago, ditchcrawler said:

This set up looks better than a fan for moving the air, not sure what a BSS chap would say 

 

 

 

I'm sure the box of dynamite would move a *lot* of air...

[Mike Todd]

2 hours ago, ditchcrawler said:

This set up looks better than a fan for moving the air, not sure what a BSS chap would say 

 

 

But surely it will suck what warm air there is in the room and eject it through the roof flue?

[Jerra]

2 minutes ago, Mike Todd said:

But surely it will suck what warm air there is in the room and eject it through the roof flue?

Just what I thought.

[IanD]

12 minutes ago, Jerra said:

Just what I thought.

The flue is sealed from the pipe connected to the room, this is basically an air-to-air heat exchanger which takes in cool air at floot level, heats it up using the flue, and expels it at roof level -- like a chimney the vertical height helps it draw air in.

 

It's simply taking more of the heat energy which would be wasted and go out of the chimney (by cooling the flue gases down) and using it to heat up the room.

Edited December 19, 2021 by IanD

[TheBiscuits]

14 minutes ago, Mike Todd said:

But surely it will suck what warm air there is in the room and eject it through the roof flue?

 

11 minutes ago, Jerra said:

Just what I thought.

 

So neither of you pressed play then?

[Jerra]

11 minutes ago, TheBiscuits said:

 

 

So neither of you pressed play then?

I didn't if I pressed play on ever video posted I would get nothing done.

[David Mack]

3 hours ago, ditchcrawler said:

This set up looks better than a fan for moving the air, not sure what a BSS chap would say 

 

 

The advice given elsewhere for double skinned flues is on the basis that a hotter flue draws better and results in more efficient combustion. This goes the other way in that it extracts more heat from the flue gases than would just radiate from the flue pipe, and so makes the flue gases cooler. Sending less heat out of the chimney must result in more heat being retained in the room, which is after all the objective of having a stove, so I agree with this approach.

On the other hand, insulating the firebox must result in less heat being emitted by the stove body, so does he need the flue heat exchanger to compensate?

[Tonka]

Do not mess about with an Eco fan

Get one of these https://skaats.com/

[Jim Riley]

3 hours ago, Tonka said:

Do not mess about with an Eco fan

Get one of these https://skaats.com/

At £150, can't to much more than a £20 Aldi one, redistributes the same heat. 

[cuthound]

7 hours ago, Tonka said:

Do not mess about with an Eco fan

Get one of these https://skaats.com/

 

Heavy on marketing bolleax and light on engineering details.

 

I'll bet it works on a Peltier cell, just like all the others and the only innovations are the leather lifting handle, silicone fan, fan guard and choice of colours.

[ditchcrawler]

Twice the blow 

 

 

[Tony Brooks]

On 21/12/2021 at 19:50, cuthound said:

 

Heavy on marketing bolleax and light on engineering details.

 

I'll bet it works on a Peltier cell, just like all the others and the only innovations are the leather lifting handle, silicone fan, fan guard and choice of colours.

 

A cowl on a fan is supposed to stop it throwing air out by centrifugal force and thus improve the fan efficiency, that is why some vehicle cooling fans were cowlled. I can't see it is worth the price though.