That's not an AC unit, you just add ice and it blows slightly colder air out until the ice melts.
I ordered a Mitsubishi wall mount system which arrived today, should have it fitted in the next week or so.
Dyson Fan ..or something else
- Thread starter hideki
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That's not an AC unit, you just add ice and it blows slightly colder air out until the ice melts.
I ordered a Mitsubishi wall mount system which arrived today, should have it fitted in the next week or so.
Soldato
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I posted the same thread a while back and some people suggested me getting one of those 1 metre high column fans. So I went for one of those and 2 years later still doing really well in the downstairs room. I could do with air con upstairs though as sleeping at 18C night time temp is uncomfortable. Problem is that air con is prohibitively expensive and only cars and the workplace (if you're lucky) have them.
Let us know how that goes.
+1 pretty much this, i have the big standing one at my office and unless the ambient air in the office is cool, all it does is re-circulate the warm air :/.
Monumental waste of money in all honesty, we even have the floor heater version of the Dyson and thats absolutely rubbish...cranked it up to the hottest setting and its just warm air...not good when the office is freezing cold in the morning like it has been for the past winter.
Luckily for me we have one air con in the office thats working at the moment, the other 3 need to be fixed but stupid expensive for the work they want done :/
Soldato
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dyson fans are ridiculously stupid and those who buy them make me sad.
it's simple to think about. imagine a big 30" fan blade needs to spin one rotation to move say 30 tones of air (i have no idea how air is measured), it can do one simple slow rotation. now imagine a dyson airblade which has a tiny 5" blade, it needs to spin 6 times as much to move as much air, meaning it needs to spin 6 times as fast, and as it's tiny it makes a higher pitched nasty noise.
i bought a £10 fan from tesco easily 5 years ago. it's used every single night for at least 6 hours and hasn't been an issue. i don't get why people think seeing the blade is an issue.
it's simple to think about. imagine a big 30" fan blade needs to spin one rotation to move say 30 tones of air (i have no idea how air is measured), it can do one simple slow rotation. now imagine a dyson airblade which has a tiny 5" blade, it needs to spin 6 times as much to move as much air, meaning it needs to spin 6 times as fast, and as it's tiny it makes a higher pitched nasty noise.
i bought a £10 fan from tesco easily 5 years ago. it's used every single night for at least 6 hours and hasn't been an issue. i don't get why people think seeing the blade is an issue.
There are three processes that move heat around - conduction, convection and radiation. Moving air increases the amount of convection.
http://en.wikipedia.org/wiki/Convective_heat_transfer
Go outdoors at 5C in still air and it'll be cold. Go outdoors at 5C in a 40mph wind and it'll be bloody freezing. A fan is, essentially, creating wind chill on a much smaller scale.
the way the technology works is slightly different to your thinking. The 30" fan blade of a standard fan can only move the column of air behind the blade right?
The way this technology works is by taking a small 5" fan blade and distributing its "push" along the edge of the ring - this way is can drag the air in the middle of the ring with it.
so that 5" fan blade is actually moving the equivilant air that the 30" fan blade does - and in that sense they call it more "efficient"
the reason a ceiling fan is more effective than a normal fan is the orientation
we know that heat rises right? so if you were to look at your room through thermal vision you would see cooler air at the bottom and warmer at at the top - in a gradient
so a normal fan is horizontal: the air it moves is along one layer of air temperature
a ceiling fan, however, pushes the air at the ceiling downward. It forces the warm air at the top of the room down the the bottom. In this way it breaks the temperature layers and creates a convection cell which means you have constantly moving/mixing air to cool you
They could be considered nice ornaments, but if I wanted to spend a lot of money on a fan and an ornament I'd buy them seperately rather than as a combined item.
The movement of air is usually measured as volume of air moved per unit of time, e.g. 30 cubic feet per minute. By the way, you're more than a bit optimistic about how much air is moved by a fan. Air weighs a bit over a kilo per cubic metre, so you're talking about moving something like 25,000 cubic metres of air with one rotation of a fan. Quick conversion website...heh, that's nearly 900,000 cubic feet. A good 30 inch fan might move 10 cubic feet per rotation. If you had a fan in your house that could move 900,000 cubic feet per rotation, you probably wouldn't have a house left
I think it's the higher rotation speed that causes the higher pitch, but I might be wrong. It's not as simple as 6 times as fast to move the same volume with one sixth of the diameter...I think it would be much worse because the fan blades would be much less than 1/6th the size.
Me neither. A domestic desk or floor fan is not going to spontaneously disintegrate and fling out the blades like a giant shuriken of doom. I've got a 12 inch tilting desk fan on my bedroom floor, tilted slightly upwards. Does the job well enough, is fairly quiet on the lowest speed and cost me ~£10. If I open a window as well, my room drops 10C pretty quickly.
Unfortunately you are right
It's no more effective than a fan and definitely not any quieter! Just blows out slightly cool damp air... Sending it back!we bought a mobile aircon unit last year for around £100
our little girls room gets to 30+ degree's by bedtime when its nice weather.
this thing has been a saviour and brings it down to 18 for bedtime , temp raises to mid/low 20's in the night still but at least the little one is comfortable enough to get to sleep.
its mobile i.e on wheels but its heavy and i live in a 3 storey house so a right pain lugging it up the stairs.
our little girls room gets to 30+ degree's by bedtime when its nice weather.
this thing has been a saviour and brings it down to 18 for bedtime , temp raises to mid/low 20's in the night still but at least the little one is comfortable enough to get to sleep.
its mobile i.e on wheels but its heavy and i live in a 3 storey house so a right pain lugging it up the stairs.
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I have an AM01.
I was well aware when I bought it that its expensive and doesn't offer anything over the cooling of a cheaper fan.
I mainly bought it because it looks nicer than other fans and its also easier to clean the dust from than blades.
It is loud at full wack, but during the day its not an issue when it's really hot. I can sleep just fine with it on a lower setting at night and wouldn't want it on full then anyway, as t would be like sleeping on a windy hillside.
I was well aware when I bought it that its expensive and doesn't offer anything over the cooling of a cheaper fan.
I mainly bought it because it looks nicer than other fans and its also easier to clean the dust from than blades.
It is loud at full wack, but during the day its not an issue when it's really hot. I can sleep just fine with it on a lower setting at night and wouldn't want it on full then anyway, as t would be like sleeping on a windy hillside.
Nice
I'll post a pic in here http://forums.overclockers.co.uk/showthread.php?t=18525033
They are described as 'Air Multipliers' but as far as I can tell they do just move air around like a standard fan.
I'm open to suggestions on particular AC solutions as well.
It's a technical term being abused to sell a fan.
Motor drives a bladed fan and you get air moved.
The main difference is the bladed fan is hidden in the base of the dyson.
Instead of being a big slow fan pushing air in a simple manner its a fast smaller fan.
This produces very fast moving air which is pushed up the tube and released around the hoop.
The way the air is released causes the high speed air stream to pull surrounding air it meets in the same direction it's going in.
It also slows down as it does this.
Thus you have more air moving than you originally moved thus explaining the multiplying part.
There's good and bad points but mostly its sold on hype.
Doesn't make sense to buy for safety, money or noise that's for sure.