Heat Pumps: the Future of Home Heating

Technology Connections
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It's so cold that it's hot.
Part 2: trvid.com/video/video-7zrx-b2sLUs.html
I referenced a lot of old videos in this one. Here they are, in clickity linkity form!
Chest Freezers; What they tell us about designing for X
Old-fashioned rice cookers are extremely clever
Reusable handwarmers that get hot by freezing
I also made passing references to
Forced-air Furnaces: The What, Why, and How
Portable Air Conditioners - Why you shouldn't like them

Technology Connextras (the second channel that stuff goes on sometimes):
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The TC Subreddit
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28 Şub 2021




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Technology Connections
Hello! Here's a comment with some extra info on efficiency and the metering devices used in heat pumps. First: my wording on the efficiency drop in the cold was sloppy, and it sounds like I'm suggesting the need for defrosting is the only reason it loses efficiency. It is _a_ reason, but not the biggest one - that's simply that as the outdoor temperature gets colder, it's harder for the refrigerant to absorb heat because the temperature difference between it and the air gets smaller. In fact, in the clip when it was -10°, it wasn't building much frost at all because it was very dry. But that was so cold that the refrigerant could barely capture any energy, which is why its output was tepid. And to be clear, its rating down to 5° doesn't mean it operates at full efficiency at that temperature. That's just the lowest temperature that it can sustain its rated heating output. Re: metering devices. I still somewhat suspect that the mini-split has a capillary tube and largely because of its cost. It was surprisingly inexpensive (this unit was about $1000, but the smallest units from this same manufacture only cost $750 and are fully capable heat pumps). If you use a thermal expansion valve or similar, you need one for each direction which adds to the system's complexity somewhat. I'd still argue that it hardly does - it is, after all, one or two small components of a large system. But simply reversing the refrigerant flow doesn't work on its own in systems that use these more complex metering devices. They'd need some additional piping and valve work (some such valves were visible in the demo rig) to accommodate two metering devices for each direction of flow.
Jason Dolph
Jason Dolph 14 gün önce
I was super surprised when I first moved to Japan and EVERY air conditioner was also a heater.
LTVA 17 gün önce
@melskunk central heating is a big system where water is heated by power plant or similar building that is built specifically for it. Then this water travels via pipes to houses and goes through radiators, cooling down and heating up rooms.
melskunk 18 gün önce
@LTVA wait what is the difference between a furnace and central heating? We call our home furnace our central heating
Ethan Nichols
Ethan Nichols 18 gün önce
Could you turn a window AC to be outside and heat your house or room technically?
汪波 18 gün önce
Our company It is a scientific and technological enterprise specializing in the R & D, production, sales and service of solar energy, air source heat pump hot water, heating and refrigeration engineering systems. It is the development and cooperation unit of Zhejiang Energy Research Institute - new energy source. The company won the title of Hangzhou high-tech enterprise in 2010 and ultra-low in 2011 The warm air source heat pump unit project won the national science and technology small and medium-sized enterprise innovation fund project award, and won the new industrial product award of Zhejiang Province. Also we want to find some partners or agents,If you are interested, we can communicate this matter。my e-mail: fexur@foxmail.com
LinkinPark4Ever1996 6 saatler önce
Shut up and take my money
Rust Is NOT a Crime
Rust Is NOT a Crime 8 saatler önce
Just something else we will have to pay more for that won't work as well .
Big Daddy Wes
Big Daddy Wes 11 saatler önce
Thermodynamics you so crazy. Always flowin' and shit.
craigmcfly 14 saatler önce
I watched this one after trvid.com/video/video-ZArBfxaPzD8.html so now I get the latent heat and the refrigeration cycle that I was denied!
DanCanRV2 22 saatler önce
Good job !!!
Bjarne McDonald
Bjarne McDonald Gün önce
You shoud do an "air to water" heatpump episode. We have a outside unit like yours and it makes warm water for floor heating. Absolutly the most comforble heating in cold climates.
Wayne's World
Wayne's World Gün önce
I've been thinking for years, that a centralised heating/cooling system for all devices in a building could be very efficient. ie. Fridge/Freezer, Hot water, Oven, AC etc. Where one device needs heat, another needs cooling, so the energy is moved around rather than wasted to the outside. Of course a sufficiently sized unit outside to make up the slack. This means gas fittings everywhere though.
j Gün önce
I cant believe that people in the US don't know about these things 🤯
László Lichtenstein
What about portable air conditioners as heat pumps?
Kyle 2 gün önce
I simply can not wrap my head around how the the refrigeration cycle works.
Jonathan Averill
Jonathan Averill 2 gün önce
So you’re saying I just turn my window A/C units backwards
notfiveo 2 gün önce
What you will notice is that in a high humidity environment, the indoor blower fan will accumulate a lot of mold which affects the balance of the indoor fan wheel. When that happens you have to remove the squirrel cage fan and clean it which is a huge PITA. So I also run a dehumidifier which keeps the mold down.
Rad Matic
Rad Matic 3 gün önce
Gas heating makes more sense. We have plenty of gas. The climate cult is crap.
achicheezay 3 gün önce
very good video but it was just like bla bla bla as my brain was being fried im going to have to watch it a few times to make snese of it :)
repeatman 3 gün önce
Well, since this video.i found out my garbage picked portable a/c works Fantastic as a heat pump! All i did was reverse the exhaust hose to the output of the evaporator.
Waylon Levins
Waylon Levins 4 gün önce
Great video as always. You understand the refrigeration process better than most HVAC technicians. First a slight correction on the metering device in your mini split, it is most likely a Capillary tube actually but it is located in the outdoor unit. This is why that in the summer the small refrigerant line will be cool to the touch in cooling mode, not like a traditional liquid line on your AC condensed unit. That’s also why both refrigerant lines are insulated to prevent condensation damage. It sounds like the system you want is what we call a dual fuel set up. Expensive, but provides the best heating solution.
Alejandro Barajas
Alejandro Barajas 4 gün önce
Isn't the problem of extreme temperature effects in houses in the US a result of most houses being built out of wood and drywall...? Wouldn't it be better to build your houses out of brick and concrete...?
Anna Dutton
Anna Dutton 5 gün önce
Dude it’s summer time 👎🏻
MrOnosa 5 gün önce
I just had a friend ask me if he had a heat pump. He's selling his home and filling out a questionnaire. Oh man did he come to the right person for such a specific question...
Patrick Pat
Patrick Pat 5 gün önce
I love my now one year old heat pump. But I know its not going to be trouble free for more than a decade like my gas furnace and window/in wall air conditioners have been. Not looking forward to replacing the compressor and evacuating and recharging it. Hope it lasts at least 5 years.
SmilesAreDaggers 6 gün önce
YES! so much good well explained science in this!
Nova 7 gün önce
Heatpumps are being build here in the new homes, now I know how they work. Which is cool to know :D
Natural Healing
Natural Healing 7 gün önce
But heat pumps use electricity which is much more expensive per unit than natural gas, so even though they use less energy, they cost more to use for heat.
Robert R
Robert R 7 gün önce
My only confusion on this video is his emphasis that heat pumps aren't well known in the US. I live in Ohio, and most people I know have a heat pump. Is this really something most Americans don't know about? Other than that, excellent video!
Andrew F Tutor
Andrew F Tutor 7 gün önce
Oh my science!
Heather Jennifer
Heather Jennifer 8 gün önce
Heat pumps have been around for a while they just suck a lot of power. One of my favorite devices, happens to be a camper fridge, the ones that run on propane or electric, ac, or dc. Basically there's no compressor, I think the freon is ammonia based, but all you have to do is just heat up this canister in the back of it. As you heat the canister in the back, it creates cold inside the fridge. That means you could literally light a wood fire behind this thing, and it'd get cold. That's how they get away with making it run on propane, the propane will heat the tank, they have a water heater type element around it, that will heat it with 120 volt AC, and they have a 12 volt element, that will also heat it with 12 volt.
Egastap 8 gün önce
Hmmm....I used to have one. Granted it was a few years ago though. If it got below 2 degrees C the heat was useless. Living in Canada we had 4 months of cold and the pump was a waste of energy. Unless they've changed the efficiency of newer models I would never bother with one.
wolfos atar
wolfos atar 8 gün önce
You have no idea how much joy your videos bring me.
Kamlin Kilgroe
Kamlin Kilgroe 8 gün önce
very nicely done video. however, as the current technolgy goes, an air to air heat pump only makes sense in a mild climate. THEY CANNOT HANDLE BITTER COLD. FORGET IT. ground source heat pumps are a good optiion in the far north, i bet. i hope. MOTHER NATURE ALWAYS SAYS "NO". things may improve, as technology advances. SLOWLY. lets be really careful not to be idealidtic. WE HAVE NOT YET ESCAPED THE NEED FOR FOSSILE FUELS IN COLD CLIMATES. be real. be honest. thx this video is a wonderful science lesson and im grateful. cheers!
Joy 8 gün önce
---!!! it's like how plant roots absorb nutrients---!!!!!!
Rev_dude 9 gün önce
So its an LED traffic light?
Past'uh 9 gün önce
heat pumps really suck, Especially those mini splits. they dont do either heat or cool to well, they just exist. as a service tech I run into customers who have nothing good to say about heat pumps everytime.
BigBad John
BigBad John 9 gün önce
Hum, well why don't you run the back up strip heat in defrost and there won't be any cold air coming out after defrost.
Apollo 9 gün önce
Great video brother! Quick note on 14:59 - The metering device on a MS is usually a capillary tube unless it’s more efficient and then you would have a thermal expansion valve of some kind or electronic expansion valve. However they are not located in the indoor unit they are actually located outside on most occasions.
O!Technology 10 gün önce
As far as I know the metering device in minisplits are in the outdoor unit.
lostc0z 10 gün önce
Would you be willing to expirement using a generator for the power source and use a heat pump window unit vs a quartz infrared space heater and show us the results?
Nicholas Jones
Nicholas Jones 10 gün önce
Haha dope B roll hahaha
lostc0z 10 gün önce
It sounds like you're saying that a heat pump produces a over-unity for heating. Are you saying that the power plant miles away burning natural gas is more efficient than heating with a fireplace or natural gas furnace on site. Isn't their loss in powerlines and conversion losses from burning gas to boil water to turn a turbine heck they have to pump the water to boil how much energy was used for that? A gas furnace is using a blower motor for it's electric needs but a heat pump is using that plus a compressor several sensors and electronics. Let me tell you what savings you'll have with a heat pump water heater. None. Upfront cost - High, Plumber - High, + now you need a HVAC Tech - High, It affects your homes heating system costing you more, needs a drain for condensation. It falls into regular resistance heating with heavy usage or everytime it needs service and Techs are so expensive no one gets it serviced so shame on owners for not maintaining it. It works on paper not in reality. High Maintenance costs are the problem with technology and only the rich enjoy these impractical clown engineered devices. Most improvements in vehicle fuel efficiency came from weight reduction and turbochargers. A drop of fuel will always contain the same amount of power as it did 50 years ago and probably 50 years from now.
B00rish 11 gün önce
147 degrees C out of an air con unit inside the house'? could fry food on that o.O lived and worked in Greece for 5 years previously, all air con out there (UK origin, no aircon), pretty sure around 30 was normal on the units?
SmoothMechanic 11 gün önce
I’ll just grab some uranium for heat.
DAN8137 12 gün önce
I have 2 indoor units and 1 outdoor. What happens when I set one of my indoor to heating and one to cooling?
Freddo Flintstono
Freddo Flintstono 12 gün önce
Heck, I had reversible ones in Malta. That gets never below zero as a result of a very large moat (it's an island), but when it's 10ºC outside you're very happy they cam reverse their summertime job (where it can go from 23ºC night time to > 35ºC as soon as the sun goes up).. Nice article, and sensible logic. Thanks for this.
Kenneth Kossan
Kenneth Kossan 12 gün önce
Wehad one in Minnesota in the seventies already..
Sergeant 12 gün önce
A CoP of 2.9 in ideal, test conditions? So a CoP of 1.0 at home if you're lucky.
Artur H
Artur H 12 gün önce
In the book of Isaac Asimov foundation, the planet Trentor was heated like that. He wrote it in the Nineteen fifties.
frank rizzo
frank rizzo 13 gün önce
Just an FYI about GSHP in urban areas. St. Patrick's Cathedral in NYC has installed a huge Ground Source Heat Pump System to provide ALL heating and cooling . The Abbey in Bath, England has also installed a Ground Source Heat Pump plant. Your information about Ground Source Heat Pump installs are not accurate!
NightChime 13 gün önce
"Not rated for under 5 degrees." So, perfect for me here, in California, but this is still news to me!
Jami Blankenship
Jami Blankenship 10 gün önce
I can say with all honesty, if you are in a part of the state that does sometimes, even rarely, get a cold snap have a backup heat source available. My family had mini-splits in our apartment in south-central Pennsylvania. Not an area of this state known for the type of cold and snow you see along Lake Erie or towards Pittsburgh or State College. But for those few days in the winter when the temperature would start hanging out perpetually in the 20's the units did almost nothing. If the temperature got below 15 they stopped working completely. We ended up supplementing the heat with an electric fireplace that doubled as an entertainment center.
Brad Ryan
Brad Ryan 13 gün önce
Future? I’ve had a heat pump since 1986
Ergzay 13 gün önce
-8C is kind of too warm for most environments in the US. It gets much colder than that in winter.
WASH WOMEN 777 13 gün önce
Let me tell you something the new world order for a 100 years now have been making people believe they need sticks and bricks, know you need dirt you need the dirt to keep you warm you need the dirt to keep you cool , look up Michael Reynolds look up earthships, look up straw bale homes it look up. The truth green is the earth.
William Richard James Nicholson
You're a bit behind the curve on this since heat pumps have only been used for about 50 years now ! ! To present this as if it is recent development is ridiculous. Only a dolt would believe this is a notable subject. What next , are you going to tell us the new development of blending color of exterior machine unit to building color by using spray paint on their cabinets ? ? I have unit hidden by blending green spray painted exterior unit to match the green of the hedge that surrounds the perimeter. Entire house looks better this way . Is that also an item to make another useless video about ? Lose some weight , go get outside & do something useful without the need to bother anyone else .
Car Parking Multiplayer
This would be amazing in the uk! Why is nobody talking about this? This would be a big hit with newly built homes, since here it’s rarely freezing but heating is almost always required!
Vykintas 12 gün önce
Somehow the UK is always very late to adopt new building technologies- it seems that double glazing is still a new thing there! When I lived in Scotland, a local architect, who lived in Germany for a while in the 90s, was furious while telling me how British architects and builders are still building traditional looking houses with single glazing and hardly any heat insulation, and thus the occupants of these houses then have to turn up their gas heating high to stay warm. It's a good thing gas is cheap in the UK, but it won't be like that forever :/
WantEpicMusic 14 gün önce
My dad is an electrician and refrigeration mechanic here in Australia, so I knew about reverse-cycle air conditioning from a broad overlook perspective, but this video went into a bunch of detail that I love! Thanks for being my favourite tech nerd youtuber!
Mahmoud Ezz
Mahmoud Ezz 14 gün önce
I absolutely love how educational your videos are and your angle on things but please work on making the videos shorter or a bit more energetic as it's not easy watching the entire video despite my interest in the topic May you always have more success
Michael Naso
Michael Naso 14 gün önce
boy he loves refrigeration
Marcin Kościelny
Marcin Kościelny 14 gün önce
Here in EU heat pumps are popular, especially with solar heat and electricity, as they allow you to scale down photovoltaic installation. You get quicker return on investment if you combine these three. Not to mention the reduction of emissions, which will be huge even if you rely on coal power. During the coldest days just run your cryptominer to keep you warm ;)
Davit prtterson
Davit prtterson 14 gün önce
The plucky cub partially carve because zone successively interest apropos a tricky mice. unable, anxious glockenspiel
Quixote 14 gün önce
"Reverse the polarity of the refrigerant flow!"
Munk Puppy
Munk Puppy 14 gün önce
my parents live in southern Canada, and they also have a heat pump that works quite well. They are really efficient!
James Jin
James Jin 14 gün önce
stronger pipes & valves with better coolants would allow this to work more efficiently in extreme weather conditions
- 15 gün önce
He's right, every winter I turn my window A/C unit around so the cold blows outside and the hot side is in my apartment.
JetpackDino 15 gün önce
This reminds me of a really cold day from school. I live in Australia, so we only used the ac to cool a room. So in this scenario, no one even thought to turn the ac on. A few teachers started bringing heaters in before someone said something lol.
Rob Schofield
Rob Schofield 15 gün önce
That's about the clearest explanation of this subject I've heard. A very good video indeed!
Caleb Reetz
Caleb Reetz 15 gün önce
Hey! I know exactly were that is! Went to school at FRCC!
Simon Munch
Simon Munch 15 gün önce
how much did Pepsi give Pioneer to include there logo ;)
Sophie Robinson
Sophie Robinson 15 gün önce
Lolan 15 gün önce
Rip the average winter day for me is -26c. Warm days are -17c cold days are -50c
MediaMatters IsMyCockHolster
The Texas Big Freeze of 2020: I know of a large company that replaced their Propane based HVAC system with a heat pump system that was all electric, and guess which one failed, because Heat Pumps lose efficiency as the temperature drops? Sure, you can get add on electric elements for heat in the system, which works great, right up until either A) the power bill gets jacked up thousands of dollars, or B) the power goes out or into rolling blackouts, and regardless, you are still a slave to an electrical utility, and with the likely potential of higher bills even when working within 'normal' temps, or a blackout whenever they need it. With propane or natural gas, it's easier to run minimal systems with a backup generator of some sort. One of the owners who approved purchasing this technological trainwreck stated that they had researched it first.. on TRvid.
Stormspark 15 gün önce
I'm getting a Tesla Model 3 soon-ish (month to a month and a half or so). And...guess what it has! The AC in the car is a reversible heat pump.
Ian Benavides
Ian Benavides 15 gün önce
This connection of videos makes all of this science make more sense!
Marcin Dżamroga
Marcin Dżamroga 16 gün önce
Teletext video?
lollopingnoob 16 gün önce
My family recently built a house - as in in the last year - and we got an air source heat pump. Shits crazy
Ed Aten
Ed Aten 16 gün önce
Why don’t carbonated beverages cool themselves as they decarbonate?
Rolph Finkin
Rolph Finkin 16 gün önce
Your audio is decent, but please run it through the "de-esser" in audacity to kill some of that sharpness in your "s" sounds. When I turn volume up, there are major volume spikes on your s's and it's almost painful when the rest of the vocals are just nice and audible, not 'too' loud.
Axe 001
Axe 001 16 gün önce
"What if I were to tell you that all of the energy you need to heat your home on a cold winter day could be found.. outside?" Me:Bullsh*t.
George Loyie
George Loyie 16 gün önce
As a payer of ridiculously high heating bills in Canada, this really caught my eye! So I googled it a bit... Here's what I got: For climates with moderate heating and cooling needs, heat pumps offer an energy-efficient alternative to furnaces and air conditioners. Like your refrigerator, heat pumps use electricity to move heat from a cool space to a warm space, making the cool space cooler and the warm space warmer. (As cold as it gets here, well it gets just as hot in the summer, not very moderate) Drawbacks of air-to-air heat pumps are: regular maintenance is required (cleaning the filter on the indoor unit) and a service check every 2-3 years. loss of efficiency as temperature decreases below 6-7ºC (but some models can still provide heating in temperatures down to -15ºC) (So in Canada, where winter temps get as low as -40C, this will require either another unit, or wood heat to take up the slack.) How much will my electric bill go up with a heat pump? $50 to $100 per month. (So I guess I won't be buying one, shucks!) Heat Pumps will raise your electricity bill - but lower your costs for other heating fuels. Each single unit (often referred to as a one-to-one) heat pump that is used daily will increase your electricity bill by $50 to $100 per month.
Withnail1969 16 gün önce
What a load of mumbo jumbo. It's against reason to think you could efficiently warm up your home with air that's a lot colder than the air indoors. Can't possibly work without using loads of electricity. It is most certainly not going to be more energy efficient than just burning gas onsite to fuel central heating.
betaneptune 16 gün önce
Nice video. Less repetitive than others. But temperature is not the "concentration of energy." You can have boiling water, with the liquid and gas phases at 212 deg. F. Both are at the same temperature, but the concentration of energy is much higher in the liquid.
BlackSmokeDMax 16 gün önce
Any idea of the efficiency of that similar outside unit north of you? Next time i have to replace mine is certainly love to consider the option.
Ken Mason
Ken Mason 17 gün önce
Okay I know you're all talking and stuff but I'm diggin' that sport jacket yes...yes, it's rather snazzy. A big huge gaudy yellow gold ring on your little finger . That's all that jacket needs. Come on. You know I'm right. A good CHUNK of gold, HEAVY. A ring that says stuff. Yes. A ring that makes people say "What the HELL man!?"
George H
George H 17 gün önce
2:11 I love the dubbing. I have seen movies with worse dubbing. "'Yippee Ki-Yay, Mr. Falcon" (done for American TV censorship, but some dubbing in theatrical releases was bad too)
True River
True River 17 gün önce
3:00 Welcome back to your chest freezer; star of an earlier video :)
hwd71 17 gün önce
So its like a portable air conditioner which blows the hot exhaust air inside instead of out the window?
Rodrigo Madera
Rodrigo Madera 17 gün önce
Incredible content, as usual. It’s rare to find such production quality filled with solid engineering knowledge. Definitely one of my favorites on YT.
Tom Turnbull
Tom Turnbull 17 gün önce
We have heat pumps in the UK. I used to work for a company that installed them underground.
OlTrailDog 17 gün önce
In western MT I heat my 30x40 well insulated home with one of these heat pumps except for when it gets below around 5*F. I don't bother to use the air conditioning cycle in the summer as I just open the windows in the early morning and close up the home during the hot part of the day.
PauleraBR 17 gün önce
Incredible, you managed to make me understand this. Wow, that is quite an accomplishment, thank you.
Darius Varno
Darius Varno 17 gün önce
meanwhile i'm watching this video with an axe near a pile of wood :))))
edgeeffect 17 gün önce
Why has no one made a refrigeration system and named it "Maxwell's Daemon" ???
Lucky 13
Lucky 13 17 gün önce
"Air conditioning has been standard in American homes for over 50 years." You are showing your privilege, here, son. Make that 30 years, and you would be correct.
Ce1es 17 gün önce
ok, so does this mean when Tesla announced they put a heat pump into their Model 3 that they just added that little reverse valve and piping thingie? Because the rest was already there being the A/C system that comes as standard in basically every modern car. [edit] that's exactly what you point out in the next one, nice :) [/edit] Also the fact that this system can have an energy efficiency above 100% blew my mind.
Matthew Byrd
Matthew Byrd 17 gün önce
The “future of home heating”? Really? Heat pumps have been around for a long time.
adaptiveplexus 17 gün önce
I thought you lived in Orlando FL, I guess you moved up north
muten861 17 gün önce
What you propose is in Europe standard. MURICA f###k yeah!!
IronLion219 17 gün önce
This is an awful explanation of refrigeration.
Dunwell 17 gün önce
I had no idea I was interested in this stuff. Maybe I should go into the HVAC trade.
Steve Larsen
Steve Larsen 17 gün önce
What FLIR camera are you using?
David Rumming
David Rumming 18 gün önce
Wow. First up....those split air AC systems are getting retro fitted to many buildings in U.K.....such as workplaces, dentists, doctors surgeries. As for heat pumps, the aim of U.K. gov is to have all new buildings + replacement systems be heat pumps (or alt simply electric heating) in 10y from now. Currently most buildings are heated by gas - not the stuff you put in automobiles, but the gas they dig up from under the sea and pipe it to buildings. Are heat pumps really that reliable...seems to be lots of plumbing in the system.
Walter Burton
Walter Burton 18 gün önce
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The ring in box illusion! #shorts
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