155 points

It’s not the AC that are incredible. Modern heat pumps are incredible. They are the best thing since the sliced bread. I could talk for hours about heat pumps. They’re just so efficient.

Heat pumps - they pump my heat.

Did I mention I like heat pumps?

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45 points

It’s literally the same machine

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41 points
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Non-native English speaker, but I looked it up the other day and it seems that pedantically an A/C only cools things down and heat pumps can both heat and cool.

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67 points

ACs are just heat pumps where they forgot to install the reversing valve.

Heat pumps running in heating mode are basically ACs that are trying to cool down the outside. The fundamental technology just moves heat from one place to another, leaving one place warmer and one place colder.

This is also how fridges and freezers work - they have heat pumps that pump out the heat from inside their box and as such make the room they are in warmer.

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46 points

Yes, an air conditioner is a heat pump with a fixed orientation, what basically equates to a handful of valves to switch the direction of the refrigerant. The actual expensive parts that generate the temperature difference are identical between the two machines.

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6 points

Colloquially, “air conditioner” often refers to a centralized system with ducting, while a “heat pump” usually refers to a ductless mini split.

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8 points

There are also heat pumps that only heat. It takes a second valve or so to enable it to switch directions.

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4 points

At least in North America, the term “Air conditioner” means a device designed to cool a room, where a “heat pump” can cool or heat that room. They work by the same exact principle (all the compressing, condensing, evaporating stuff) but a “heat pump” has a method of running in both directions. You could probably contrive one that could run the pump in either direction but I think most use a valve to switch which is the high pressure/hot side and which is the low pressure/cold side.

I grew up in a house with a heat pump, I currently live in one with an air conditioner and a furnace. When it’s time to replace my air conditioner (or do other heavy maintenance to the system) I’m going to look into a heat pump, with the furnace as a backup heater in lieu of strips.

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-6 points

Nope AC does both. What the word heat pumps means seems to vary on where you live. Here it’s mostly things that only heat water for radiators or hot water tank.

Arguably they should all just be called refrigerators as they all use the refrigeration cycle.

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4 points

AC is a version of heatpump that cools your house. Refridgerator is a heatpump that keeps your food cool. Freezer is a heatpump wäthat freezes things.

AC is not the same thing as heatpump. AC is just one application of an heatpump.

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1 point

It is the exact same hardware running in different configurations, all that changes is refrigerant flow direction.

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4 points
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Well… Kind of. Heat pumps are a more modern iteration, which can both heat or cool a room. And they’re not like a traditional central AC system, where you have a central compressor and ducts running to each vent. Instead, you run refrigerant lines to each room, then the individual room unit actually does the cooling locally. It’s the same basic principle (using refrigerant to move heat outside, thus cooling the air,) but heat pumps are a more modern take.

And as an added bonus, a heat pump can also be used as a heater (and be much more efficient than a traditional heating coil.) Because it’s just moving heat around from the interior and exterior, and that can include moving heat indoors to warm the interior. And since they’re just moving heat (instead of using a coil to generate it) they can be over 100% efficient when you’re measuring wattage consumed vs heat produced.

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3 points

My HP is central ducted. You’re talking mini splits, one kind of HP.

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1 point
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Deleted by creator
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14 points

Im gonna have a nice long wank listening to this user passionately talk about heat pumps

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14 points
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You meant walk, right? Right???

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8 points

You heard the man.

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2 points

Did they fucking stutter?

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1 point
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16 points

You’ve surely seen one of the many videos from Technology Connections, then?

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3 points
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Of course I have. Matt Ferrell has some nice videos too.

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11 points

The refrigeration cycle is humanity’s greatest invention.

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1 point

We’ve got a ground source heat pump with underfloor heating and cooling since two years. It’s always a comfortable 19-22 degrees Celsius inside (66-72 Fahrenheit) and we’d never want anything else.

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-1 points

Tell that to the vast majority of Germans. They’d rather throw their relatives into the furnace for heating than buying a heat pump. That’s all thanks to far right populism by the way.

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2 points

They’d rather throw their relatives into the furnace for heating than buying a heat pump.

Sounds more like a german tradition.

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1 point

Yeah, in hindsight that was some unfortunate wording Ü

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122 points

Guns are fun as hell, it’s true. Unfortunately as with most things in the world, shit gets ruined because people don’t know how to act right

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5 points

I’m Australian and guns are really strictly regulated here, I also believe that guns are FUCKING FUN. Sometimes I get shitty about how hard it is to own a gun for recreational shooting then I see a smackhead at the supermarket screaming at random people and how unlikely it is that they have a gun and I think “Yep, Ill take that trade”.

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7 points

Hopefully OOP lives in a country that has good gun laws - like Czechia.

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22 points
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Honestly it’s not that bad if the building is made right. Especially old stone houses that also happen to be surrounded by trees are absolutely godly in these scenarios (the down side is the heating bill in the winter :P or rather that used to be the downside…). I honestly wouldn’t have ever considered an AC a couple years ago, but now that summer means a constant 30°C I’m reconsidering. Like bro, 30°C used to be a HOT exceptional couple days, not the entire summer!

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4 points

You are absolutely right about old stone houses. I live in an old stone cottage surrounded by trees and it’s amazing in the summer. We turn our ac on a few weeks to a month after everyone else does(in the US).

The winters aren’t too bad either. We have a tiny wood stove and even when using the oil furnace it holds heat in pretty well.

Side bonus! Home owners insurance gives us a break because the risk of fires goes way down when the outside is made of rocks.

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2 points

Trees are OP. Please nerf.

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19 points

We in EU also have AC, what’s the difference?

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7 points

I wish we did in Sweden.

It’s fairly rare in family homes.

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-2 points

You can’t buy a window unit? I literally don’t get this…explain how you can’t go to a hardware store in your country and buy an air conditioner or order one online

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3 points

A lot of houses were built before window units were a thing, so you get windows that just won’t fit them, and you need slightly to moderately more complicated systems to make it work, like “air conditioner bolted to wall with a hose into the window or through a wall” style.

Their climate is also on average vaguely more forgiving in the heat, with temperature ranges that are comparable but lower sustained highs and generally lower humidity resulting in generally more tolerable conditions even during the warm season.
Remember that Europe is much further north than we typically think. Italy is as far north as new York, and Germany is about as far north as Canada. “Why aren’t air conditioners as popular in nova Scotia as they are in Florida” has a more obvious ring to it.

Finally, if you’re used to it it’s not a problem you feel compelled to solve.

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3 points

They don’t exist in my country and our windows doesn’t work with one either. We don’t have sliding windows.

You can of course install real air conditioning but that’s expensive as fuck.

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2 points

The northern most states in the USA also have the same arrangement. It’s (historically) in a cooler climate, where a “heatwave” is anything above 80F, so just open your windows if it’s stuffy indoors. Combine that with fossil-fuel heating, and heat-pumps just aren’t a thing.

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4 points
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North vs South. AC is not very common in homes in countries like Netherlands and Germany. Mostly because it’s only really hot for one or two months and those are the months that Germans and Dutch people are on holiday. So it’s either go on holiday or stay at home for one summer and buy AC.

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6 points

Most of my friends in Germany and UK do not have AC, or have such undersized units for their homes it barely makes a difference. Or they don’t want to run it because energy costs to utilize it during the day are ridiculous.

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1 point

What I’ve learned at least about the houses in the UK is that the homes are old and drafty so it’s not about the size of the unit but the insulation being poor.

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2 points

Shit insulation is actually more of a pro argument for AC. I mean, the houses in the USA are made out of cardboard and gipsum. They dont insulate a thing. My house has great insulation. In summer I just keep the windows closed and roll down the shutters during daytime and it’s freezing cold inside. At night we get cool wind from either the North or Baltic sea, we then open up the windows to freshen the air up a bit.

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69 points

At 40 cents / kwh you learn to tolerate heat very quickly.

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Heat is quickly becoming deadly around the globe. Better figure out how to budget that cost, asap.

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-36 points
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Keep yourself cool to worsen the problem? sounds like a great plan! /s

AC users anywhere in the world where temperatures / humidity are in a range that humans can adapt to are morons.

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40 points

Passive cooling and designing buildings to not overheat during summer in the first place is the way. And phoenix or Las Vegas shouldn’t be much more than a gas station, they’re unlivable hellholes without permanently pumping enormous amounts of energy in.

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8 points

I have AC and heating and live in a very human-fiendly climate. I don’t feel like a moron running it off my green power to heat and cool a very well insulated house beyond what the geothermal handles.

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14 points

At 40 cents/kWh I would buy a solar array.

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22 points

Gotta buy a house first!

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3 points

You can get solar panels for balconies in your local home supply store

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7 points

I can barely afford food. a solar array is super luxury. plus i don’t have place for it anyway.

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3 points

Or get solar on your roof. Usually when it’s hot enough outside to need AC, then that means the sun is shining

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1 point

Or, you know, buy a solar array. I hear it’s windy in the UK too. 🙄🙄🙄🙄

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2 points

That’s fucking nuts; the only time my power bill gets anywhere close to being that high is for three hours a day in June and July (34¢/kwh). For most of the year it’s only 9¢/kwh.

Don’t know how other countries do it, but in the US the home energy sector is highly regulated. Probably one of the only things we do right; but we soon as lawmakers try to propose similar regulations to healthcare and the internet, suddenly it’s “SoCiAlIsM”

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1 point

Jesus, where is this?

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2 points

California

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2 points

Yikes. And my yikes is by Australian standards, where the cost of living compared to most parts of the world is pretty high.

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