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  • FIRST POST
    • whitesatin
    • By whitesatin 26th May 13, 11:00 AM
    • 1,887Posts
    • 5,688Thanks
    whitesatin
    Running costs Dyson hot/cold fan
    • #1
    • 26th May 13, 11:00 AM
    Running costs Dyson hot/cold fan 26th May 13 at 11:00 AM
    We were given some gift vouchers and thinking of buying this:

    http://www.johnlewis.com/dyson-am05-hot-cool-fan-heater/p405220

    We would use it both as a fan in summer and to give a quick boost in our cold rooms in winter. Also, occasionally we might use it as a heater in our garden room if we want to sit out there on colder days.

    Any idea if the running costs on this item would be very high?
Page 3
    • ncvireland
    • By ncvireland 27th Nov 16, 4:42 PM
    • 2 Posts
    • 0 Thanks
    ncvireland
    Dyson AM09 fan
    SFAIK this item does not purify air in any way. I base this on the fact that there are no filters fitted. It circulates the ambient air in which it operates.
    • northwalesd
    • By northwalesd 27th Nov 16, 7:40 PM
    • 186 Posts
    • 117 Thanks
    northwalesd
    SFAIK this item does not purify air in any way. I base this on the fact that there are no filters fitted. It circulates the ambient air in which it operates.
    Originally posted by ncvireland
    The Dyson Pure does have a HEPA filter in the base. All Dyson products are overpriced though, in my opinion.
    • Cardew
    • By Cardew 27th Nov 16, 10:12 PM
    • 26,810 Posts
    • 12,994 Thanks
    Cardew
    I think you are all missing the point when it comes to efficiency

    A fan heater can never be 100% efficient

    It has moving parts which by definition require energy to make it move

    It is a fan so it will make noise - more energy losses

    So basically it cant be 100% efficient in terms of heating because you are already using some of the energy to run the fan - energy to overcome the electrical resistance of the cables
    and energy losses in sound and light
    Originally posted by Michaela76
    Einstein would not agree with your definition!

    The fact is all direct-acting heaters are 100% efficient at point of use. If your heater uses 1kWh of electricity, 1kW of heat will be transferred into the room for one hour. As The Law of Conservation of Energy dictates:

    Energy cannot be created or destroyed, but can only change from one form to another’.
    Where do you think the energy to rotate the fan, and produce the noise and light and the movement of air goes - if not converted to heat?

    If you put a huge powerful and noisy fan(without any heating element) consuming, say, 1kW in a room, using your definition that 1kW would all be lost.

    Same exercise with a 1kW searchlight in a room - what happens?
    • redux
    • By redux 27th Nov 16, 10:22 PM
    • 17,106 Posts
    • 21,660 Thanks
    redux
    Are Dyson heaters for use in the house as loud as the hand dryers in motorway service areas?

    A couple of weeks ago I asked the toilet attendant if he had thought about wearing ear defenders. He didn't understand, as he couldn't hear me properly.
    • evildude
    • By evildude 3rd Mar 17, 8:55 AM
    • 3 Posts
    • 0 Thanks
    evildude
    Made an account to wade into this
    Hey guys. So first off it doesn't matter how strong your conviction, I have had a huge number of different heaters by different brands over the last 8 years and the Dyson AM05 is without a doubt the strongest, hottest, coldest and most efficient fan / heater I may ever own and I thoroughly recommend this product, but someone will always tell you to buy cheap. (£10 fan heaters cause fires, Dog hair or a bit of debris inside it and boom I've literally seen them catch fire)

    If you want to go cut price but get longevity and efficiency on a similar scale you would be best off buying a £55 Stanley hot and cold from Screwfix.

    Lastly I have a story that money savers will love.
    I wanted a Dyson, they were too expensive, I took a punt and won one on ebay for £120 second hand. Looked grim in the pictures, when I got it I plugged it in and it went BANG and that was it. Messaged the seller, he claimed it must have been damaged in transit and he would get his refund from parcel force then he refunded me fully... in 5 minutes.
    So I'm left with this broken Dyson AM04, Wondering if I can fix it, I do an hour of research and came across a story (in the Daily Mail of all places) that said something like 'Dyson AM04 fans built between August 2010 and December 2010 have burnt down 3 houses and are being recalled'
    I phoned Dyson, Obviously the old owner never registered his product (nobody does!) Gave them the serial number and they were happy to send me a brand new AM05 upgrade with a 2 year warranty and take the old one.

    So there you go, The universe gave me a free Dyson.
    Last edited by evildude; 03-03-2017 at 8:59 AM.
    • phillw
    • By phillw 3rd Mar 17, 9:22 AM
    • 801 Posts
    • 400 Thanks
    phillw
    What happens to that light when it hits anything other than a perfect mirror?
    Originally posted by ValHaller
    Some of the light escapes out of the window.

    You want a heater to heat the air, not the non reflective surfaces of your room. If the energy ends up in a place that you can't immediately use it then it will get wasted.

    Wrapping up is more effective as you don't need to warm all the air & have the heat escape through the roof, walls & windows.
    Last edited by phillw; 03-03-2017 at 10:43 AM.
    • northwalesd
    • By northwalesd 3rd Mar 17, 12:57 PM
    • 186 Posts
    • 117 Thanks
    northwalesd
    (£10 fan heaters cause fires, Dog hair or a bit of debris inside it and boom I've literally seen them catch fire)
    ....
    that said something like 'Dyson AM04 fans built between August 2010 and December 2010 have burnt down 3 houses and are being recalled'
    Originally posted by evildude
    I'd rather pay £10 for an appliance to burn down my house than £400 (or whatever a Dyson costs)

    Thankfully when my DC01 vacuum cleaner burst into flames it didn't burn down my house.

    I do admit their service is very good though...
    • Raxiel
    • By Raxiel 3rd Mar 17, 1:38 PM
    • 310 Posts
    • 151 Thanks
    Raxiel
    Some of the light escapes out of the window.

    You want a heater to heat the air, not the non reflective surfaces of your room. If the energy ends up in a place that you can't immediately use it then it will get wasted.

    Wrapping up is more effective as you don't need to warm all the air & have the heat escape through the roof, walls & windows.
    Originally posted by phillw
    Unless the window is more opaque to Infra red EM radiation than Visible, that makes no difference. The warm air in the room also heats the non-reflective surfaces. Infinitesimally less so when they have been warmed by the tiny amount of energy from the glow of the heating element and the vibrations in the air from the fan noise.

    One electric heater is just as efficient at heating a given enclosed space than another.

    Yes, heating a smaller space (i.e. the immediate space you occupy) by wrapping up is more efficient, but that's comparing apples and oranges.
    • evildude
    • By evildude 20th Mar 17, 11:04 AM
    • 3 Posts
    • 0 Thanks
    evildude
    OH guys!
    So I immediately thought I should post this here.

    My free Dyson AM05 developed a bit of a hairy fault. Got clogged with dog hair and although it works fine on cold, on hot it gives an error message after 5 minutes.
    I rung Dyson to flex my warranty expecting a recondition. And it turns out They are recalling all AM04 and AM05 still in warranty and giving you a free AM09 worth £400.
    Just tell them it has the E8 message and when you hoover it out, it still persists. They don't even check it, a courier trades you the new one on your doorstep.
    Hope you did buy one in the end OP, give them a call!
    Last edited by evildude; 20-03-2017 at 11:06 AM. Reason: extra info
    • northwalesd
    • By northwalesd 20th Mar 17, 12:32 PM
    • 186 Posts
    • 117 Thanks
    northwalesd
    And it turns out They are recalling all AM04 and AM05 still in warranty and giving you a free AM09 worth £400.
    Originally posted by evildude
    Based on that alone I'd never entertain one!
    • Cardew
    • By Cardew 20th Mar 17, 12:36 PM
    • 26,810 Posts
    • 12,994 Thanks
    Cardew
    Nonsense. Electrical elements emit light, have you never looked inside an electric oven?


    Clearly not as some of the energy is emitted as light.


    No, your statement violates the law because you are saying that something that emits light is somehow also emitting all the energy it consumes as heat.
    Originally posted by DragonQ
    Yes that what I am saying!

    I tend to agree with Einstein in these matters but clearly, according to you, his theory is nonsense.

    Put a 1kW searchlight in a room(so no light can escape) and the room will get equally as warm as using a 1kW device of any kind - including a heater. If that was not the case what happens to the energy?

    No point in continuing this discussion; you 'know' you are correct!

    Edit.
    DragonQ has deleted his post.
    Last edited by Cardew; 20-03-2017 at 12:41 PM.
    • evildude
    • By evildude 20th Mar 17, 5:12 PM
    • 3 Posts
    • 0 Thanks
    evildude
    I'd rather pay £10 for an appliance to burn down my house than £400 (or whatever a Dyson costs)

    Thankfully when my DC01 vacuum cleaner burst into flames it didn't burn down my house.

    I do admit their service is very good though...
    Originally posted by northwalesd
    So by your logic, if your house was one of the 3 burnt down by an award winning product of an international market leader, you think that would be more hassle for you than if a £10 nondescript chinese manufacturer did the same. Devices that literally warn of the fire hazard on the front of them.....

    Anyone who did invest in one, has already gotten access to a free upgrade to boot.
    I find your logic flawed, and you clearly want a reply
    • reeac
    • By reeac 20th Mar 17, 6:56 PM
    • 1,085 Posts
    • 431 Thanks
    reeac
    Nonsense. Electrical elements emit light, have you never looked inside an electric oven?


    Clearly not as some of the energy is emitted as light.


    No, your statement violates the law because you are saying that something that emits light is somehow also emitting all the energy it consumes as heat.
    Originally posted by DragonQ
    Any light that's emitted is ultimately absorbed by surfaces that it hits and is converted into heat .. normally a small effect but that's what happens . Ever experienced being warmed up by sunshine?
    • northwalesd
    • By northwalesd 20th Mar 17, 8:58 PM
    • 186 Posts
    • 117 Thanks
    northwalesd
    So by your logic, if your house was one of the 3 burnt down by an award winning product of an international market leader, you think that would be more hassle for you than if a £10 nondescript chinese manufacturer did the same. Devices that literally warn of the fire hazard on the front of them.....

    Anyone who did invest in one, has already gotten access to a free upgrade to boot.
    I find your logic flawed, and you clearly want a reply
    Originally posted by evildude
    Not at all, the only flawed logic is yours by stating that £10 heaters can go pop and then going on to quote reports of a £400 device doing the same thing.
    • mcmiix
    • By mcmiix 3rd Jul 17, 2:46 PM
    • 1 Posts
    • 0 Thanks
    mcmiix
    Yes that what I am saying!

    I tend to agree with Einstein in these matters but clearly, according to you, his theory is nonsense.

    Put a 1kW searchlight in a room(so no light can escape) and the room will get equally as warm as using a 1kW device of any kind - including a heater. If that was not the case what happens to the energy?

    No point in continuing this discussion; you 'know' you are correct!

    Edit.
    DragonQ has deleted his post.
    Originally posted by Cardew



    You said "Your statement that energy will be 'lost' as light or noise etc contradicts the First Law of Thermodynamics that energy cannot be created or destroyed." This doesn't make any sense as lost is not the same as destroyed.


    You also said "That is not correct; all electrical heaters are 100% efficient at converting the energy they use into heat". This statement in fact breaks the 2nd law of thermodynamics which states "It is not possible to convert one form of energy to another with 100% efficiency"


    You're posts indicate you are strutting around with an air of righteousness but you really a bit of spouting fool.
    • Great Orme
    • By Great Orme 10th Sep 17, 8:58 PM
    • 1 Posts
    • 0 Thanks
    Great Orme
    Cheap ones dont seem to last very long and develop rattles and buzzes. The Dyson is aesthetically pleasing and more effective at heating as well as being whisper quiet. Other features like remote control, tilting, swivelling, timer and fan strength make it a more sophisticated and pleasing device to use and own. Expensive yes, but initial impression compared to old £50 blow heater is it is much more effective, quieter, nicer to look at and a pleasure to use. Time will tell.
    • MobileSaver
    • By MobileSaver 11th Sep 17, 8:16 AM
    • 1,186 Posts
    • 1,617 Thanks
    MobileSaver
    it is much more effective, quieter, nicer to look at and a pleasure to use. Time will tell.
    Originally posted by Great Orme
    Quieter?!? My AM05 Hot and Cool is the noisiest fan I have ever owned!

    The Dyson fan has a number of positives but quietness is not one of them and it is simply not practical to use if you are trying to watch TV.
    Respect to 3 of the greatest actors of all time; amazing people who are totally believable as the characters they play & almost single-handedly make the shows they starred in:

    Peter Dinklage as Tyrion Lannister in Game of Thrones
    Daniel J. Travanti as Frank Furillo in Hill Street Blues
    Claire Danes as Carrie Mathison in Homeland
    • BBH123
    • By BBH123 11th Sep 17, 9:17 AM
    • 405 Posts
    • 543 Thanks
    BBH123
    I have the AM09 and I absolutely love it.

    It heats the rooms far better than any other heaters I have had over the years and is not noisy, yes you can hear it but not over the telly or other normal household sounds and it looks good not taking up as much floor space.

    The biggest reason for buying one personal to me is I have dogs and in the unlikely event they knock it over it will cut straight out.
    • A Flock Of Sheep
    • By A Flock Of Sheep 11th Sep 17, 1:45 PM
    • 4,718 Posts
    • 5,994 Thanks
    A Flock Of Sheep
    I would like to add that I have this AM09 fan from John Lewis. Basically because I had £200 of JL credit on a gift card as a free gift.

    I don't know if I would pay the full price for this but I was prepared to add the difference.

    It is a really nice appliance and worked well in the hot spell we had in June and the rest of the summer. It was also a bit chilly in the bedroom where it is located one night last week - think it was raining out and to me it always seems chillier then. It heated up lovely and only needed to be on for about 10 minutes before the bedroom was comfortably warmed.

    I just picked up the remote and pressed on and hot and away it went.

    I used to have a normal type of desk fan (cheap one from a well known catalogue store) for the summer and would collect it away for storage when the autumn came. That one seemed to attract dust and the front grille kept falling off in the end where the plastic clips broke. I used food bag ties to hold it on. The white metal mesh also started to go rusty.

    With this Dyson fan I have no intention of putting it away in a cupboard as it serves a heat as well as cool function and it is just too lovely to hide away.

    I have even installed a corner shelf in my lounge to put it on so I can use it to heat and cool the lounge and it fits well being tall and slim. Who knows I might even get a second one for the lounge - highly likely if I get a JL voucher again of significant value.

    In conclusion: A useful dual heat and cool appliance with a nice range of features and remote control. Also aesthetially pleasing. - Remember folks with money - YOU CAN'T TAKE IT WITH YOU WHEN YOU DIE!
    Last edited by A Flock Of Sheep; 11-09-2017 at 1:49 PM.
    • A Flock Of Sheep
    • By A Flock Of Sheep 11th Sep 17, 1:53 PM
    • 4,718 Posts
    • 5,994 Thanks
    A Flock Of Sheep
    Incidentally I also have the Dyson cordless vaccuum cleaner. Yes again expensive but I think it is worth the money. I must confess to not possibly purchasing one if I had not tried the one that my Neice got - where I was then suitably impressed.
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