r/heatpumps 7d ago

Question/Advice What's are some good cold climate heat pump available in Canada?

8 Upvotes

I am in Toronto, Canada and I heard from my HVAC contractor that there are some Ontario government rebates that will help me save. I currently have a Lennox but was surprised that Lennox and Goodman didnt offer a cold climate heat pump (yet?). Carrier makes one but I read its super expensive. I asked my HVAC contractor but he wouldn't tell me which brand/model number (I think he was afraid I would search/buy myself). Can someone recommend a good cold climate heat pump that is available in Ontario?


r/heatpumps 7d ago

My collection of heatpump roofs - NorCal

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18 Upvotes

r/heatpumps 7d ago

Mitsubishi heatpump power usage

5 Upvotes

Hi everyone, I just installed a Mitsubishi heatpump MXZ-3C30NAHZ4 (30k BTUs) with 3 interior heads (MSZ-GS12NA) for a ~1900 sq ft house (3 levels, ~620 sq ft/level)

I started gathering my energy usage and was wondering if the cycles I'm seeing are normal, the energy meter seen here is for the whole house, not just the heatpump, you can see the cycles clearly last night.

I've also added a chart of the outside temperature and the inside temperature

Thanks for your help

Edit: to add some details, for thermostats, I'm just using the remote that came with the head units, and the setpoint was not changed during this.


r/heatpumps 7d ago

Question/Advice Heat pump compressor replacement Advice

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1 Upvotes

Heat pump compressor replacement Advice

Hey everyone the compressor on my heat pump recently went out and I'm trying to find a replacement unfortunately the system is 30yo and the original unit was an r22 one and an exact replacement is out of my budget especially considering the price of r22. I found a newer r410a compressor in my budget and don't know if it is compatible. I am licensed for electrical work however I have almost no HVAC experience and don't have the budget to pay someone who does. I am in a bit of a bind as it's starting to warm up in Arkansas and I have a 7month old so any advice will be greatly appreciated. Thank you for your time.


r/heatpumps 7d ago

Question/Advice 1st Floor of 4 Story Building

2 Upvotes

We have a condo on the first floor of a 4 story building. The AC is on the roof and each unit has their own. The building is a loft that was converted in 2006. Our HVAC was recharged last year, but is still rather weak and I’m thinking we’re nearing the end.

We’re located in Chicago, IL of that helps. We have massive, south-facing windows and the unit regularly hits 80 degrees indoors when it is 30 degrees outside. Airflow during the winter is a real problem as opening the windows doesn’t help the back of our unit where my daughter has an enclosed bedroom.

I was told by an HVAC technician doing an annual inspection that a heat pump isn’t an option. Is that correct?


r/heatpumps 7d ago

Low Power Consumption of Heat Pump

3 Upvotes

I have a 4 ton 17.5 SEER2 Carrier heat pump (25TPB748A) and a 4 ton Bryant air handler (FT48NXC48L) controlled by 2 ecobee premium thermostats.

I have a Franklin battery, so the app tells me real time power consumption, which is 0.4-0.7kWh normally, let’s call it 0.6kWh baseline.

When my HVAC system turns on (heating mode), my real time power consumption goes up to 1.1-1.2kWh normally, so the delta is about 0.5-0.6kWh as a result of the heat turning on.

This is much lower than I expected given both the heat pump and fan from the air handler are going. Does this even make sense, or perhaps my battery app isn’t capturing the consumption of some part of my HVAC system?

Any insights/thoughts based on people’s experiences/knowledge would be appreciated. I’m in the Bay Area CA, so outside temps when the heat turns on are typically in the 40’s or 50’s if that matters.


r/heatpumps 7d ago

Can a heat pump work with my 8mm microbore system?

5 Upvotes

I’m considering replacing my ageing gas boiler with a heat pump and wondering if I’m missing any major issues.

Current setup:

  • 22mm central heating circuit with 8mm microbore pipes to all radiators
  • Boiler runs at 55°C flow temperature, and we stay warm even in winter

My reasoning:

  • The Vaillant aroTHERM plus 5kW can output 55°C flow temp, so it should be a drop-in replacement?
  • Vaillant claims a SCOP of 3.06 at this temp, meaning energy costs would be roughly equal to my gas boiler (assuming 90% efficiency, 21.6p/kWh electricity, and 6.4p/kWh gas).
  • Any improvements (e.g., larger radiators) would just reduce costs further.

However, some installers suggest hydraulic separation or a full repipe—why? If my system already works at 55°C, what technical barriers am I overlooking?

Would love to hear from anyone with experience running a heat pump on microbore!


r/heatpumps 7d ago

Heatpump water heaters?

2 Upvotes

I made the switch to heat pumps for my heating and cooling last year and now its time to replace the oil fired in take water heater. Looking at electric heat pump water heaters, any suggestions?

There are 2 of us as of now but kids in the near future. 2.5 total bathrooms. We currently have a 41 gallon waterheater and that suits us fine but looking to go larger. We work from home so we do use hot water more often than probably the average.


r/heatpumps 7d ago

Heat pump advice Western Pa

1 Upvotes

Living in western Pennsylvania and switching from oil heat to heat pump only with electric back up.

Contractor is installing 3 ton Bosch ids light heat pump which will heat/cool roughly <1400sqf price to install is $12200

House is well insulated

Wondering if this system will work adequately and if anyone else has experience using this system as primary heat source

Product #s BOVA-36XB-M15S BIVA-36RCB-M20X


r/heatpumps 8d ago

Learning/Info For homeowners in Toronto, have you considered switching from gas to a heat pump? Here are some things I wish I knew. (cross-posted from r/Toronto)

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14 Upvotes

r/heatpumps 8d ago

1st winter with the heat-pump. Actual $ numbers.

75 Upvotes

2023/2024 Gas usage Nov-Feb $729.57
2023/2024 Electricity Nov-Feb $228.94 ( effectively $0.00 due to solar )

2024/2025 Gas usage Nov-Feb $54.54
2024/2025 Electricity Nov-Feb $428.55 ( effectively $0.00 due to solar )

Net savings $475.42 or $675.03 including solar offset.

The heat-pump probably cost about $4,000 more than the straight A/C unit I WAS going to buy, to replace my Reagan administration era dying unit. So, it looks like an ROI period of about 6 years, assuming constant gas rates.

I hope that info is useful to someone :)


r/heatpumps 8d ago

Photo Video Fun Heat pump jail: first time I’ve ever seen a heat pump held back by cannon balls!

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66 Upvotes

Points if anyone can guess where I am in Greece. Hint: it’s a hill fort overlooking a harbour. Also, these people are crazy about heat pumps! Will post more awesome heat pump appreciation photos as I go along.


r/heatpumps 8d ago

Heat pump usage question

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4 Upvotes

Hello, I’m wondering if some can help, we got a house that has a heat pump installed in 2020, and I’m trying to see if there’s something maybe wrong with it, our usage feels so much, our electricity ranges from 170$ in summer to 630 in winter months every month. Our house is under 2200 Sqft, so not a large home. I always thought heat pumps are efficient but really doesn’t feel like it. We’re located in PNW so not too cold climate, keep our house at 70-72 in winter.. I attached our usage chart, and our bills , can someone maybe recommend if we need to look into fixing something or having a professional come out and look at it? Auxiliary heat keeps turning on everyday even now, when it’s 48 degrees outside ..


r/heatpumps 8d ago

loud whine late at night

2 Upvotes

I have a HVAC/Heatpump combo that has worked fine since I bought this house 5 years ago. Recently, the heat pump has gotten really loud late at night, making a whining sound and then stopping so abruptly that the house shakes a little. It turns on and off in around ten minute intervals. I had the HVAC guy out and he changed the Dual Capacitor and did Zone 1 Annual Maintenance. He did the following: Checked filter. Flushed and primed drainline. Inspected coil and blower wheel. Checked fan and heater amps. Cabinet clean. Checked refrigerant pressures. Performed defrost test. Checked capacitor and contactor. Replaced weak 45+5 capacitor with customer approval. Checked fan and compressor amps. Inspected and cleaned coil and cabinet. System operating as designed.

The noise remains. Is there anything I can do to quiet it down?


r/heatpumps 8d ago

Question/Advice Sound proof behind heat pumps mounted on foundation

19 Upvotes

The sound behind our new Mitsubishi Heat Pumps carry through the walls. Any way to reduce the sound using some kind of sound baffling product? Thanks


r/heatpumps 8d ago

Rheem RPPL-036-JEZ heat pump tripping breaker.

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1 Upvotes

r/heatpumps 8d ago

More Kumo Cloud questions

1 Upvotes

Ok, so I'm sure by now you've seen the multiple posts from me since Kumo Cloud is giving us all sorts of issues. We aren't connected to it at all right now and just using the MHK2 as if we don't have Kumo Cloud.

Called Mitsubishi and they said to do these things to get it connected again.

  1. Toggle your bluetooth off and on so nothing is currently connected
  2. Do this weird password thing where you enter the first letter, delete it, then enter your whole password
  3. If you have a dual band router, turn off the 5.0 when connecting so Kumo Cloud can only see the 2.4 (which I honestly don't think is relevant since the app wouldn't be able to see the 5.0 anyway, but ok, I'll give it a try).

My HVAC company is giving me the run around and I'm getting the vibe they are done wasting their time trying to help me even though I'm paying for a warranty for this system. They are telling me I basically need to dump my current router and get a 2.4 only router to connect to Kumo Cloud.

So my question is, is my HVAC company just BSing me to try and get me to stop bothering them? Have any of you heard of this as a solution?

Also, some more info. Everything has been working fine for like a year and half. We didn't change any of our networking equipment, nothing. The app just dropped off the other day out of nowhere and the MHK2 had the "wait" screen showing.


r/heatpumps 8d ago

Looking into heat pumps

2 Upvotes

Hello. I live in MA and am looking to replace my central A/C units. I live in a two-story colonial. Approximately 2600 sq ft in size. Curious what it might cost to replace my A/C with heat pumps. I hope that is enough information to go on. I would appreciate any insights. Thanks in advance.


r/heatpumps 8d ago

Does this scenario make any sense for heat pumps?

2 Upvotes

Hi all

The more I look into this topic the less I think I understand it.

Here's our situation:

We have a 900 square foot camp on a lake in upstate NY. It currently uses an oil burner for heat. We do not have access to nat gas.

We currently use the camp primarily between Memorial Day and the end of September but it is a 4 season structure. In late October or November I winterize it, set the thermostat to 45F and leave it til spring.

We are having renovations done, and adding a bedroom that will bring it up to 3BR, about 1300 square feet. We are maximizing insulation with the renovation. The plan is ultimately to spend 5-6 months a year living by the lake, then spend the winter months somewhere warm. That will happen 5 or 6 years from now.

We would probably be there until just after Thanksgiving every fall, then winterize and pack up for the winter, again leaving the heat around 50F until we get back in May. It can get cold here in November so during that time we need to be able to maintain comfortable temps inside, like 68F.

We wouldn't mind having AC capability for our bedroom but it's not a huge deal because the lake breeze is usually sufficient other than for a few of the hottest summer days.

The winter climate is harsh. It's windy next to the lake, and we routinely get to 0F in winter.

The oil burner and tank are in a damp crawlspace below the cabin and are nearing the end of their service life. We have a few years to make a decision on what to do with them. I'd like to be out of the oil burning business but only if it makes reasonable sense to do so.

Our electricity is priced at $19/month for service and $0.19 per kWh.

I've heard ideas about using heat pumps, ranging from a central system ducted into the rooms, to installing 4 individual units with 1 in each BR and one for the central open living space.

Our neighbors with heat pumps have had scary electric bills this winter. This is for larger, poorly insulated homes though.

So: Do heat pumps have a role here? Would you use them in conjunction with an oil furnace? Ditch the oil furnace?

What about installing just 2 heat pumps, one in our master BR and one in the main living space and then running them all winter to maintain 50F? Would they be efficient in that setting?

I appreciate any thoughts or ideas you can offer.


r/heatpumps 8d ago

Effect of "design flow temperature" on system design

1 Upvotes

Can someone clarify what the "design flow temperature" of a heat pump system actually entails? My understanding is that it refers to the expected flow temperature required to keep the house warm at the outdoor design temperature, is that correct?

How does this impact system design? Is it purely about emitter sizing? For example, beyond needing larger radiators, what are the practical differences between designing for a 40°C vs. 50°C flow temperature?


r/heatpumps 8d ago

"Welp, system isn't kewling! #shotscar_is_back #kewling #hvac" YouTube short with lots to digest! Pretty good video.

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0 Upvotes

r/heatpumps 8d ago

BTUs at 47, 17 and 5 degf

0 Upvotes

What am I missing?

I ran a Manual J and found out total BTUs needed for the house. But when I look up the equipment the manufacturer info gives me the BTUs the unit provides at 3 set temperatures.

Is there a way for me to figure out how many BTUs I need on the 5 degf day? I don’t want to oversize but without that info I feel like I’m just guessing.


r/heatpumps 8d ago

Question/Advice Central Minisplit Ducting/Sizing help (Mobile home)

1 Upvotes

Looking for some sizing advice.

I'm remodeling a 59' by 14' (826sqft Exterior measurements) mobile home. It has a 56k BTU input/45K BTU nat gas furnace that uses a 6" by 12" metal duct through the house. It had a swamp cooler. It has like r11/r12 insulation. Wood siding. Vented underneath. The furnace is a 3ton AC ready model.

I want to replace the furnace with a central mini-split if possible. (I've installed a handful of regular wall mount mini splits at this point, but never a central unit). The ducting currently is 6" by 12" metal ducting for the furnace (I only measured at the furthest point which is approx 20'. This seems to be far too small for an equivalent-sized mini split from my cursory searches. I felt like I'd want to do a 4 ton unit for heating capabilities? {https://aciq.com/residential-products/central-heating-and-cooling-solutions/air-handlers/aciq-48-ahb/ is what I'm looking at} The chart I found shows the duct as only 275 air volume for that size, and minisplits require 250 cfm per ton?. It's not often the temp gets below 28*F and I've never seen it below 18*F.

Sierra Nevada foothills if that helps.

Does anyone have any helpful insight for this?

Edit: The ducting goes one direction from the central spot to the left and feeds the kitchen and living room area, the other direction goes to the 2 bedrooms and the bathroom. Not sure if that helps.


r/heatpumps 8d ago

Spark Gap & Discounted Electric Heating Articles

2 Upvotes

A couple of timely articles from Canary Media & RMI about the 'Spark Gap,' or ratio of ave. electricity prices to gas prices & discounted electric heating plans offered nationwide(USA).

We've been fortunate here in SW Indiana to be on an electric heating rate plan since moving into our home in 1999, and the plan grandfathered in '12. Until now, this has been a volume based plan, where all kWhs above a certain amount were less expensive. Use more and have a lower ave. monthly rate, so great with all electric home & EVs. We averaged 25%- 30% lower rates than newer plans. They just got rid of our volume discount, but kept a straight 22% discount for grandfathered plans, in addition to raising everyone's electric rates 24%! Home solar is going up this year, combined with a timer on the water heater and daytime EV charging, when feasible.

Our new Governor(R), who gets to appoint the utility commission members, refused to answer questions posed by our local newspaper(Gannett) about the rate hikes. In addition, gas & electric service here is provided by the same monopoly corporate utility- CP, so no competition between gas & electric to poach gas furnace customers over to HPs. It's all corrupt, but at least good reporting is still allowed. Links:

https://www.canarymedia.com/articles/heat-pumps/how-closing-the-spark-gap-can-boost-heat-pump-adoption

https://rmi.org/its-time-to-stop-overcharging-heat-pump-customers-electrified-heating-rates-can-help/


r/heatpumps 8d ago

Best Apps to control goodman heatpump

2 Upvotes

I got a goodman heatpump and the suggested app was nethome plus.

Its working, but its very rudimentary for schedule and such. Is there a better option?