Here’s How People In Great Britain Are Reacting To The Record-Breaking Heatwave (32 Pics)

Yeah, but it’s better than nothing. Plus, it’s working on the same basic concept as A/C, though not as effectively or efficiently.

Damn it, you beat me. :(

You dont use it to cool a whole freaking room, you just let it blow right on you or someone you care about.

Zsolt Jandzsó You surely have a mono block ac. This things are a scam. The effect is next to nothing considering the amount of energy it consumes. The reason is simple. The exact same amount of hot air that gets blown out of the window through the hose gets replaced by the hot air from the outside. (try to blow out air form a closed room without producing a vacuum... That's not possible. One cubic meter of air goes out = one cubic meter of air goes in. Otherwise you would blow out the air and suffocate) The only effect is that the exhaust air is a little hotter than the sucked in air from the outside. But it's a waste of like 80% of the energy, compared to a proper, split ac, that has the heat producing parts outside of the house and works with closed windows. An ac works like this: A compressor compresses a gas and then expands it. The compression produces heat, the expansion produces coldness. The amount is the same on both sides. That's simple physics. You can't produce energy, you can only convert it. Example: when pumping up your bicycle tyre, the valve becomes warm. That's the effect of compression. When releasing the air, the valve becomes cold. That's the effect of expansion. When having both inside the same room, the effect is zero. A mono block ac has a small effect because it runs much higher than it would need to and uses the hot summer air to cool the even hotter compressor a little. But it's an incredible amount of energy for a small temperature change. Therefore you need to have the heat producing parts outside of the house to get only the desired effect of it. Never buy a mono block ac, unless you're happy with a 2-3 °C difference and you have a lot of money to waste.

Michelle Crumpton Of course I've placed it right beside me. I've used about 15 pounds of ice packs, letting them freeze over night. My freezer was half full with them. I've build a similiar rack, but much deeper. The air was passing 3 stacks in a row. And yet the air wasn't considerably colder. It would need to be at least 10 times as effective to be even remotely worth the hassle. And like already mentioned, a physicist or mathematician would face palm like a maniac when finding out that people actually think this would work. A freezer is a small, thermally insulated, closed system and uses maybe a 100th of the energy than an ac uses. How should this even work? It's like throwing two or three ice cubes into a hot bath.

I have an ac, it can cool down the room 2°C. Still in 1h, it will go back to the normal temp.

That must be a very slow fan then, because with normal fans the fan is to fast for the camera to catch it still like in the picture

Amelia, it must be at just the right angle to catch the blades, this happens when the camera shutter speed is the same as the rotation of the blades. Like when you photograph a helicopter (blades look like they’re stopped), or a moving car and the the rims look like they are not moving. Usually works more when you shoot video, but yeah it could be off too. 😳😉

Or: don't build outside steps with loads of exposed tar