Dyson hot and cold fan how much energy consume?

everfor007

Shifted to apartment, in bed rooms fitted with wall electric heater.  currently  i am using only  dyson fan in  hot mode  average running 12 hrs daily
https://www.johnlewis.com/dyson-hot-cool-purifying-fan-heater/p5729624

Going forward will have more usage on heaters, just wandering which one is cheaper interms in energy bill i.e dyson hot fan or wall electric heater?

grumbler

Both are 100% efficient. So are all other electric heaters.

Dyson spends some energy on blowing air, but ultimately even this energy converts to heat. However, with just 40W heat output I don't think that Dyson is really capable of heating anything besides some part of your body locally. It's like heating your apartment with a 40W incandescent bulb. 

That said, future houses are supposed to be heated only by human body heat and by non-heating appliances. I don't think that your flat is A-rated in terms of energy efficiency.

carly

From memory ( and I'm not able to check my Dyson heater right now). It is only the fan cooling part which is 40 watts and cheap to run.  The heating element is approx 2000 watts and would be very expensive to run long term. It is however very efficient and warms a room quickly. You can work out the rough hourly  cost by multiplying however much you pay per kWh by 2.

grumbler

carly said:

From memory ( and I'm not able to check my Dyson heater right now). It is only the fan cooling part which is 40 watts and cheap to run.  The heating element is approx 2000 watts

For some reason all retailers keep this data secret and Dyson website is down ATM. I took the information from https://www.google.com/search?client=firefox-b-d&q=Dyson+Hot+Cool™+Purifying+Fan+Heater - top right corner

Yes, I was surprised by  "Heat output 40 W"

and would be very expensive to run long term.

Not more expensive than other electric heaters that the OP has. 1.5-2KW is a typical power for freestanding or wall-mounted panel electric  heaters.

casper_gutman

Any electric heater will basically cost the same to run. The only ways I know of that electric heating can be made cheaper are either using cheap-rate power on an Economy7 type tariff (usually with storage heaters) or using some kind of heat pump.

GDB2222

£600 for a fan heater!

Grumpy_chap

I stumbled across this thread and my immediate thought was that the heater must be more than 40W.  I've heard people rave about how wonderful these Dyson heaters are in both heat and cool modes.  When you are near one in the shop, they certainly seem to be blasting the heat out.

So, I searched online "dyson heater technical information" and then located a technical sheet, which has:


Now, judging by the input voltage, I suspect that is from an American source, but the important parameter is "Max input power 40W".  This means there are one of two options:

• The data sheet is incorrect / incomplete, and input power in heat mode is higher
• The data sheet is correct and Dyson has some amazing way to make the heat effective with such a low power

Now heat in a domestic setting is a bit subjective, I have found this very clearly with work from home.  Sometimes, the thermometer can show 20 degrees C, yet it is dark, damp and humid weather and I feel cold (like today) so the heating get flicked on.  Other days, I can feel warm and comfortable yet the same thermometer in the same location shows 18 degrees C.

The odd thing is, if the data sheet is correct, you'd imagine that Dyson would be shouting from the rooftops how energy efficient their product is "feel warm and toastie even with low energy input".

It almost makes me think of buying one, yet £500 for a fan heater is a lot of money and payback will be slow.

daveyjp

There's probably an asterix somewhere which states *cooling mode only'!

Grumpy_chap

daveyjp said:

There's probably an asterix somewhere which states *cooling mode only'!

You'd think that, but here is technical data from a major retailer website:
https://www.currys.co.uk/gbuk/home-appliances/heating-and-cooling/air-treatment/air-purifiers/dyson-hot-cool-hp07-smart-air-purifier-10222059-pdt.html


If there is repeated inaccurate energy consumption data, you'd think that some consumer group would have picked this up as a scandal.  The difference in running cost between 40 W and 2kW (or more) is huge as a percentage.

grumbler

grumbler said:

carly said:

From memory ( and I'm not able to check my Dyson heater right now). It is only the fan cooling part which is 40 watts and cheap to run.  The heating element is approx 2000 watts

Dyson website is down ATM.

It works now, but nothing there except loads of crap like reviews and and 'Latest Technology', 'quick to heat the whole room evenly' etc. - how typical for Dyson! It's beyond me how such important parameter like power can be missed in the specifications.

Effician

grumbler said:

grumbler said:

carly said:

From memory ( and I'm not able to check my Dyson heater right now). It is only the fan cooling part which is 40 watts and cheap to run.  The heating element is approx 2000 watts

Dyson website is down ATM.

how typical for Dyson! It's beyond me how such important parameter like power can be missed in the specifications.

Dyson excel in hype, smoke &  mirrors, to state the facts for direct comparisons would not be in their interest.

Oh & it's a 1.5kw heater as best i can find out.