Its is still cold

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  • 18th June 2024 at 8:48 am #600572

    Allegedly so.

    I had an an idea about that but need a technical or Gleaner type person to consider it.

    Many of us have those self rotating fans on top of our wood burners or stoves to spread the warm air around the room. I think the rising warm air spins the blades.

    If I mount say a 5 litre frozen water bottle above it, would it work in reverse as air conditioning?

    I know I would need a drip tray.

    Any comments welcome?


    18th June 2024 at 9:18 am #600579

    I think someone did that BJ but have no idea about the technicalities

    18th June 2024 at 9:26 am #600581

    Our fan which sits on top of the wood burner has some ‘connector thingies’ on the bottom which are in direct contact with the top of the wood burner and which make the fan turn when the wood burner gets to a certain temperature. Unless you have the heat from the wood burner the blades don’t turn so I’m not sure how you would make your idea work.

    18th June 2024 at 9:41 am #600589

    I was thinking that too you must have to have the heat from the fire to turn the blade as it’s the warm air that does it isn’t it?

    18th June 2024 at 9:55 am #600590

    Yes the warm air rises from the bottom which make it turn, but  why can’t the heavier falling cold air from above make it turn?

    Gleaner or Fitter WCB, Motorcycliste etc will know.

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    18th June 2024 at 9:55 am #600591

    They are a very clever little device,  The heat generates a small electrical current which drives a tiny motor attached to the fan.

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    18th June 2024 at 10:10 am #600592

    sandwiched between the fan and the base is something called a “Peltier” plate, this is 2 different materials and when there is a temperature difference between them it generates electricity, which then drives the fan motor.

    they can be run in reverse where you put electricity in and one side gets hot and the other cold, this is how a lot of battery operated drinks coolers or mini fridges work, they blow a fan over the hot side to stop it getting too hot, this causes the cold side to get even colder

    I have repaired several of the fire fans for people, as if the plate gets too hot it breaks, which is why generally there are a couple of brass/copper strips on the bottom that bend and lift the fan up if it is getting too hot

    peltier service / repair kits are on amazon etc. I think I paid around 12 euro, I see they also sell complete ready built 12v Cooling modules for around 20 – 30 euro

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    19th June 2024 at 5:50 pm #600632

    We use one of those fans that sits on the log burner, and starts turning when the fire heats up. Seem pretty effective.

    20th June 2024 at 10:19 am #600651

    regarding Ice to cool a room, we have several electric fans to which I clip ice packs on the front to cool the air, it works well to cool the bedroom on an evening

    I see the forecast is for much improved weather / temperatures after the weekend :yahoo:


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    26th June 2024 at 2:14 pm #600945

    Too hot now! No time to acclimatise between the cold of  a week or so ago to the heat now!

    28th June 2024 at 12:39 pm #601022

    Wednesday…..must have been the hottest day yet!  Cooler yesterday?  Lets hope for some more sunshine!!

    29th June 2024 at 9:58 am #601037

    Very pleasant temperatures now, as June should be. Don’t shout me down but we shall soon need rain!

    29th June 2024 at 10:12 am #601039

    You are clearly a different part of the UK to me. I got caught in a downpour yesterday midway between home and the train station so it was too far to go back for the car

    9th July 2024 at 8:24 am #601379

    Is that it then, summer over? After enjoying some decent weather for about 3 weeks in June, July so far has been crap with rain and morning temperatures struggling to reach double figures. My local forecast for the next ten days is rain and overcast with morning temperatures in low teens. This is Autumn weather.  Global warming………………………..really :scratch:

    9th July 2024 at 7:01 pm #601405

    Yes definitely autumnal! RHS Wisley visit today, raincoats & sweatshirts!!


    9th July 2024 at 7:12 pm #601406

    My daughters in Puglia …39c.

    my son in Guildford….cold rain.

    me in Normandy…not cold…but rain.


    9th July 2024 at 7:43 pm #601407

    Sunshine in Lancashire yesterday today heavy rain and thunder

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