As a fan, the $449.99 CAD Dyson Hot + Cool uses Dyson’s patented Air Multiplier technology to move air around a room with no buffeting that you’d expect to get from traditional, bladed fans. The best way to explain how exactly, the Dyson Hot + Cool works is to hear all about it from Sir James Dyson himself.
According to the Dyson website, “Air is accelerated through a narrow aperture around the fan loop. This creates a jet of hot air that passes over an airfoil-shaped ramp, which channels its direction. Surrounding cool air is drawn into the airflow, amplifying it 6 times through processes known as inducement and entrainment.” This moves a much larger volume of air than a traditional fan can., and the inducement video is taken from Steve Spangler’s (free registration required but it’s well worth it) excellent video on the Bernoulli principle.
The Dyson Hot + Cool, adds to this by being a heater, with a thermostat, that although very slow, heats the room to a programmed in temperature and keeps it there. The Dyson Hot + Cool senses the temperature of the air in a room that is being drawn into the unit. If it’s below the temperature you’ve set the thermostat at, the device keeps running and blowing heated air in the room until the air coming in is at the temperature you’ve set the thermostat at. Once that temperature is reached, the unit stops and will automatically resume when the temperature drops.
The Dyson Hot + Cool is perfect for a small to medium-sized room. I use my test model in the bedroom, but it could easily heat a living room sized room.
It’s quiet, as far as fans go – I think some white noise is great coming from fans – especially if it’s used in the bedroom. There’s nothing like the steady noise of a fan to help one get to sleep!
The knock against this device is the thermostat. When you use it for heating, it takes about three minutes for the fan to get up to heat. I guess that’s because the fan doesn’t use heated wires to provide the heat, rather heating stones along the inside of both sides of the amplifier unit. They heat more slowly and are heated to a lower temperature (never exceeding 200˚C) so that, as Mr. Dyson has said, “it doesn’t burn dust, so you don’t get that awful burnt dust smell.” And there’s no danger if the Dyson Hot + Cool gets knocked over – the device automatically shuts itself off.
The Dyson Hot + Cool comes with a remote that lets users turn the device on and off, select the oscillation, select heating or cooling, select fan speed and set the thermostat. It’s storable on top of the aperture – there’s a magnet that keeps it in place. The Hot + Cool can be tilted either up or down, a simple pivoting on its own centre of gravity accomplished this, and it stays where you leave it.
CONS: Only comes in one size, which restricts the size of the room it’ll heat or cool; expensive; slow thermostat.PROS: Quiet operation; heats a room up quickly once it’s up to temperature; great looking; the air multiplier means no blades, so it’s safe; magnetic remote, auto shut-off if it gets knocked over and it doesn’t get hot so there’s no danger of getting burned or no burned dust smell when it’s running.
TO SUM IT UP: Fast, efficient and quiet heat delivered where you want it in the winter and fast, non-buffeting air in the summer – the Dyson Hot + Cool is well worth the expense.