What are the Pros and Cons of Heat Pumps?
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- Опубликовано: 17 апр 2023
- In the video we break down the Pros and Cons of Heat Pumps.
Chapters
0:34 - What are the Pros and Cons of Heat Pumps
3:00 - What are the cons of Heat Pumps?
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Air-source heat pumps are becoming an increasingly popular way to heat and cool homes, but like any technology, they have both advantages and disadvantages.
On the pro side, air-source heat pumps are energy-efficient, using much less energy than traditional heating and cooling systems. They also provide both heating and cooling, making them a versatile option for year-round comfort. Additionally, air-source heat pumps don't produce any emissions on-site, making them a more environmentally-friendly option than some other heating and cooling methods.
However, there are also some cons to consider. One is that air-source heat pumps may struggle to provide enough heat in extremely cold temperatures, so they may not be the best option for those living in very cold climates. They can also be more expensive to install than traditional heating and cooling systems, although the long-term energy savings may make up for this cost over time.
Overall, whether or not an air-source heat pump is the right choice for your home will depend on a number of factors, including your climate, energy needs, and budget. In this video, we'll be diving into the details of these pros and cons to help you make an informed decision about whether an air-source heat pump is the right choice for you.
My 7yr old Mitsubishi Ecodan (air-water) handle -20C/-4F without help from auxiliary inline heater. (still working at -32C/-25F with aux heater helping)
I live ~450km/280miles from the polar circle and have no problem with heating my home with heatpump.
My SCOP is between 3.2 and 4.5, depending on how cold the winter gets.
Great explanation ! 👍🏻👍🏻👍🏻
Thank you 🙏
I have a heat pump .
My heat pump is so efficient in winter and summer.I’m talking 60% less.Biggest problem is the noise. Not like a central air unit that’s quiet.Loud screech sound on startup and finish are normal.It’s normal to turn on 10-15 times an hour because they maintain temperature to precisely. If it’s set on 70 and it goes to 71, it comes on. Constant cycling on and off. Never knew this. Builder put ours outside my bedroom wall where my headboard this.The noise is horrible at night
if your heatpump is turning on and off 10-15 times an hour theres something very, very wrong with it. Thats called short cycling, and its really bad for it; sounds like it might be trying to heat too small an area or theres something going on with the gassing/valve/compressor.
Also, if you've got it on auto mode, put it on the seasonal mode you require instead (ie in heating or cooling) as auto will do both ways to try and maintain temperature.
My neighbour has one same problem....it's driving me crazy !
I have seen this comment on several videos and review articles. Sounds like it can be a problem with heat pumps in general.
@@Etacovda63It’s in seasonal mode.Even had a different company come . They said it’s normal.At 30degrees the temp in the house cools faster making the pump turn on and off more. Same in the summer. If it’s 95 out the house heats up faster causing the same frequent cycling.Our solution is running the ceiling fan at night.Winter we warm up the house then click it down to 60. Sometimes we make it to 530-6am before it turns on.Once the sun hits my unit, the heat is more easily generated. Everyone has the same complaint in my community along with bad cell phone service.
@ 1:36 in my country as far as i know we have 0 incidents followed by the death of tenants!
I have seen several cases where the exhaust pipe was pulled from the boiler and the burnt gas entered the house - the tenants had headaches and called us because the boiler signaled the lack of flame...
instead, the chances of fires from overloaded electrical installations are much higher. Besides, almost all fires known to me are caused by various faults in the electrical installation ;)
Would there be any synergy with the heat pump and other structure, like if you had an attached greenhouse or sunroom, would a heat pump work better or worse?
Wondering if there are units now capable of lower temperatures. Segment on the news here in Canada yesterday and this would not do.
hi for colder climate y not put the hole system inside the house ?
I found the actual temperature range very useful. I live in a maisonette with double high ceilings in the main rooms, and the upper floor kitchen/dining room is mostly open to the living room below. Mild winters. Under the those circumstances, would air to air ductless heat pumps work?
Ductless mini splits are designed for smaller spaces with regular height ceilings while mini splits will definitely help the best way to guarantee satisfactory heating/cooling would be to have a system designed for the square footage you are trying to heat/cool. Factors that will help is your home properly insulated? Do you have double Payne windows ? Have you replaced your door seals recently?
What modifications need to be done to a house if I want to switch from a ac/furnace system to a heat pump?
depends what you want to do. To change to a ducted heatpump you'll want someone who knows what they're doing (but by the looks of it in the states you just get utterly hosed by overpriced idiots) but realistically you just want a ducted system that matches your outputs and then just replace the airhandler with that, done.
Otherwise you could do a multihead minisplit system and run lines to each area that requires heating/cooling.
will ventless ducts circulate air into apartment from the crawlspace? I read that mold can be an issue with these systems in a crawlspace.. is that an issue? we have no ground cover in the crawlspace
as I understand heat pumps do not circulate air, they circulate "refridgerant" kinda like freon. The refrigerant is used as a heat transfer agent.
Is the exterior unit (condenser) the same as a normal A/C unit? Is the difference the actual interior “furnace unit”. I’m just a DIY’er and honestly don’t know. The reason I’m asking is my original heat pump compressor failed (28 yrs old) and I’m looking to replace it.
can the actual pump be installed in a crawlspace? landlords are going to try to do that on this 100 year old uninsulated building with single pane windows. my circuit breaker only has 110 amps total.. I have about 500 sq ft but 9 foot ceilings ..this will be interesting. thanks for the good info!
Insulation and new windows will probably save more money
The cost of electricity hasn't gone up 14% the value of the dollar has gone down by 31%. Gas hasn't gone up in the last 10 years, but it is up 150% from the last 20 years.
so can i assume it would be useless in weather where -5F is a good day during the winter?
Yes
Depends for how long it stays that low or that high… look at average temps. Most low ambient heat pumps keep up down to -10 or lower, and pair well in colder climates with a dual fuel system. Our system runs year round and the average lows / highs are single digit in the coldest month, with some subzero days.
14% increase in electricity prices in 10 years is less then inflation so nothing to worry about. Nice vid thumbs up
What efficient heat system do you recommend for a cold climate area like Maine? Thank you for this important video.😃
Would recommend an all climate heat pump system from Mitsubishi
@@elitehvaccontractor thank you so much I appreciate your advice..
I've been heating my house exclusively with one wood stove here in CT for the last 15 yrs. Can't beat it for the comfort. Cons are your house will need a lot of cleaning and wood per cord has gotten more expensive. In extreme cold you need some sort of backup especially if you lose power for an extended period.
@@stoneyswolf my lungs suffer with woodstove heat - took me a couple winters to figure out why I was coughing like a cigarette smoker. Very dirty air with woodstove - big bummer because I really like woodstove heat.
Heat pumps produce less heat - especially in the winter, and generally increase electricity costs by 2x.
Does this also hold if you have a furnace as well? Just installed a heat pump and the furnace will work when temp goes below -4 C (in Canada) but I've heard it still saves on the energy bill
I currently have an old natural gas furnace and a woodstove in my basement but no AC yet. I was thinking of replacing the furnace with an air source heat pump. I think this is the only way to make a heat pump worth the installation and running costs(using it as an AC and using the wood stove with it in the winter) as the winters here can get under -30C even during the day. Anyone I've spoken to that has these, either has a woostove as well or pays crazy electricity bills in the winter. This video would confirm that as the redzone for efficiency at 25 fahrenheit is only -3 Celsius. Even with woodheat, im not sure how a hest pump wpuld do anyrhing but cost me just as much as my 30 year natural gas furnace.
Im in Canada, where the carbon tax alone makes the cost of living 33% more expensive. So needless to say, there is a lot of government pressure to switch to electric heating. Really hard to find information thar isnt completely full of bias. So thank you for that.
You can get Government rebates for the purchase of a heat pump and even an interest free loan for up to $40,000. Make sure you get the heat pump designed for cold climates . good luck.
Don't get rid of the natural gas furnace it's a great backup and in situations where the heat pump can't keep up because it's too cold you'll be glad you have that backup.
There are heat pumps rated for various outdoor temp ranges. Sounds like you're only familiar with milder climates and not those designed for cold climates, which will more expensive than the ones for mild climates, they can easily work down to -22F
They don't. I bought a top of the line, high efficiency, heat pump. When the temperature gets into the 20s, the auxiliary heat kicks on, and in the teens, the heat pump does little to heat my home, a well insulated home with premium windows. And, get ready to pay big bucks to maintain. After only 5 years, I had a repair of a reversing valve costing over $1,200. Have had gas fired furnaces that lasted three decades with only normal maintenance.
@@jgesselberty Yeah those long lasting gas furnishes are a thing of the past now too. Those tech guys come in and condemn your heater for a little crack in the burner or something frivolous and want you to buy a new Furniss
What about using this as water heater also?
Does that mean no more water tank?
We are working on a heat pump water heater video so stay tuned for that 😀
The heat pump is simply the REFRIGERATION process. Refrigeration can appear to be like magic, meaning, the efficiency can be 300% or more. The amount of energy pumped can be 3 or more times the amount of energy required to do the pumping. The magic takes place in the condenser unit. The compressor compresses the refrigerant gas into a hot gas (not a liquid). When this hot gas flows through the condenser cooling coils, it condenses into a liquid. This change of state from a gas to a liquid is where the magic is. If the condenser cooling coils are large enough, not even a cooling fan is necessary to achieve this change of state.
the only reason heatpumps are more expensive to install is because in the US you guys get raped by these HVAC techs.
A fully installed 7kw (24,000btu) heatpump in NZ is around 1500USD, including the heatpump.
They're absolutely trivial to install and theres precisely zero percent more work because it does heating and cooling, what a joke.
My 7kw unit has required exactly zero servicing by HVAC techs, all you have to do is clean the filters and blow out the coils inside and out, which is 100% free.
The comments about heatpumps being bad below 40f is a joke as well, this is like saying 'cars can't tow boats' and using a toyota corolla as your example. If you're in a cold climate area you get a cold climate heatpump, which can pull their full rated power to down to -5F.
You're an hvac tech? lol. Monkey Wrench is appropriate.
I live in Texas and my hvac is already electric I'm thinking good investment
Consider this: say it is 105 deg. outside and you have a heat pump that is supposed to take the heat from inside your house which is at a temp. of say 70 deg. and transfer it to the outdoors. It may be possible but it sure as "ell will take a whole boat load of electricity. Then consider this: say it is 35 deg. outside and 65 deg. inside your house. Do you think that taking heat from the near freezing outdoors and transferring that heat to inside will take a lot of work? You betcha, as a former governor of Alaska would say. Now conside this: Is a heat pump for you?? or for an evironmentalist???
Still deciding
If it's cold outside drawing cold air in then heating it up seems like a great idea for electric companies
what happens when you electricity goes out?
Most people's natural gas igniters and blower fans run on electric..
The extra electricity required for a heat pump compared to a blower fan is very different. But if your not below freezing temperatures then who cares just bundle up until the power comes back on. But where I live the temp drops way below freezing and this is a serious concern. So we have alternatives for power and heat. Myself I like that the furnace is easy to connect to a car battery in an emergency and can last even in the winter for three days because the heating comes from the gas not the electricity. This redundancy needs to be built into heat pumps before they can be considered as a viable option for my family.
Your gas Furness wont work
true, good point
@@scottwatson6254
Have a backup wood stove or a generator that'll handle the power needed.
Show the costs with 2 homes same square footage , new , cost comparison. Forget all that enviro b.s.
Not efficient at all your electricity bill bill will go through the roof negates the whole purpose
No thanks
3:10 I understand that heat-pumps cost more, they do need the reversing valve which adds extra complexity. But why would the cost to install be higher? It does not make any sense, it's the same process to install a heat-pump or an air conditioner. Heat pumps are air conditioners that have the reversing valve.
I dislike it when contractors offered to install a heat-pump and quoted me the install cost, based on the equipment cost. It's the exact same process to install. Install a condenser outside, install an air-handler inside, connect them together with refrigerant lines and a communication wire, fill the system with refrigerant and plug both units in. It's the exact same process wether you are using a $10k heat-pump system or a $2k air-conditioner only.
Also at 3:50, why do they require more maintenance? It's only the extra reversing valve that is different compared an AC unit, and that has no maintenance that can be done.
At 4:30 when talking about poor severe weather performance, that's true, but not below 25F. Sure there are some older designs that don't work well, but nowadays, my Mitsubishi HyperHeat is rated to provide 100% heating capacity at 5F with an efficiency of 200% and will continue to operate down to -17F.
I feel like this video is full of misinformation, don't understand why...
Heat pumps and their 300% efficiency are a big con and they go against the laws of physics. If that was the case, i.e. 300% efficiency, then why can't we install an 2nd pump in series from the 1st pump, and give out 3 times more, i.e. output 9 times from the original input? Could even try a 3rd pump and give out 27x output.....The 300% efficiency is a big con. People tried to build perpetual motion machines in the 17th-18th century, until physicists formulated the laws of thermodynamics and proved this was not possible. No machine can be > 100% efficient.
Efficiency or COP, for heat pumps and A/C units, is a measure of energy used to energy delivered to your house. So if you put in an intermediary step you would only look at the end amount of energy delivered vs total energy used. The efficiencies don't stack and the larger temperature difference between input and output would lead to lower efficiency for a heat pump in series. Also no physics laws are being violated this is a simple refrigeration cycle.
you can do a better job them this... do it again.
Horrible things, very noisy, and freeze up in the cold.
I mean, if you live south of say Nebraska, you probably aren’t gonna have to worry much about freezing up. -5°F is pretty much the standard rating. And some are rated as low as -20°F. So unless you live along the US-Canada border or north of it, you probably aren’t going to have to worry freezing up as long as you get a properly rated unit.
Mine is great
Heats and cools 3600sq foot house and really cheap compared to electric baseboard heating or nat gas
Highly recommended them
Does not ge below -15 where I live and has never had issues in cold
They cost 3 TIMES MORE TO HEAT YOUR HOUSE and EXPENSIVE maintenance
You're 100% wrong about heat pumps and cold weather.
Explain please.
@@rogercanon2436 I'm looking at specs for the Mitsubishi MXZ-SM48NAMHZ-U1 and it can do 100% of its rated heat output at 5F, still 200% efficient. It's one of many, some that can go way colder.
@@davidstewart1153 Yes and The Mitsubishi MXZ does that with auxiliary resistance heating units and a pan heater in the compressor unit which is also resistance heating and Electric resistance heating is the most expensive way to heat your home. Oh and if your Utility power goes out you are without heat unless you have a cord wood stove installed.
@@richardp.nathhorst9317 It is rated at ~2x the efficiency of straight electric resistance heating at 5F. The DOE is testing new designs to -15F. Also the grid goes down here in CO and nearly everyone has no heat because their gas furnace requires electricity to light and run.
I have a heat pump in a cold climate. Ours works down to -5F. And it's always more efficient than resistance heating such as baseboard or space heaters. However, below about 15F, it is less expensive to run the gas furnace (we have both). The video is 100% correct that air source heat pumps become less efficient, the colder the air is outside. And all of them fail to work at all if it get cold enough. Although some work down to about -25F.
Con is heat pump cant use it while its 80s outside if you want heat inside 😂
2 minutes of good info diluted into a 5 minute video with 3 minutes of gibberish. We SAW the title. We don't need you to waste initial 45 seconds telling us what cideo is about! Then, he has the nerve to say "jumping right into it."... after 45 seconds of useless fluff. 👎
you are wrong , all compressors create heat , all , and that is the primary source of heat , period
Might want to read a book champ.
Can this guy just get to it?!! Talks more then a woman!
Also "plus side" no handing $ to the republicans who own fossil fuels!!!
Cons of heat pump? Noise, noise, noise. Not worth any potential cost savings.
Steam heat with an oil boiler old school baby. Plus a window ac if that goes it’s only $150 to replace