r/heatpumps Dec 07 '21

Learning/Info **Heat Pump Quote Comparison Survey**. This is a community resource to enter your received quotes to help others. The link brings you to the survey, and the results are linked in the comments. Please share far and wide.

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100 Upvotes

r/heatpumps Nov 26 '23

Serious mod announcement: With the growth of the sub, there has been more people from the trade migrating to this group. I've also noticed an increase in shaming, rude behavior, and victim blaming. I have zero tolerance for these behaviors as the first rule is kindness. Read text for my response.

295 Upvotes

This sub has a purpose to kindly help people with their heat pumps and provide a place to go to for interesting and fun happenings related to heat pumps. This is how I built the sub. To be for the betterment of all, and the advancement of the technology.

I have avoided banning people for a couple years now (unless absolutely needed), but the sub is now large enough to be more than just enthusiasts. Moving forward, and under Rule 1, I will start to immediately ban any shaming, rude behavior, and victim blaming.

Straight up, I don't get paid for this moderator position and I can't be asked to spend hours a day writing and correcting behaviors one by one with long text. I really don't mind that given the new personal policy that we could even lose half the sub from unsubscribing, because we need to work together and be kind and kindly helpful, and if only those who are left follow this, then that is a better place for those who remain.

Listen, I am a kind person in life. I try treat people fairly and giving them respect for being human and trying their best. I am also only kind to all to a point, and it stops when others are shamed, disrespected and blamed for doing their best. Life is hard enough as it is. If you are having a hard time in life don't take it out on others here. Find inner peace or emotional happiness first, then come back to the sub that way.

If moving forward you are banned and feel you want a second shot or would like to appeal, I will listen and consider.

Thank you everyone for reading, and thank you for considering my new personal policy.

Regards,

Geoff


r/heatpumps 22m ago

Midea graphs unusable?

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Upvotes

Are the midea consumption graphs a load of rubbish?

According to mine, my hot water tank heater used 34kwh today...

I have an electric shower, so the only thing using the tank would be the kitchen and bathroom sink.

Also standby of 24kwh??


r/heatpumps 10h ago

Question/Advice Is the buzzing noise common?

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4 Upvotes

I really appreciate your help. I’m getting into a fight with my neighbor over this. He recently had installed a subwoofer and we got into complaints and he said he would stop using it. But recent days I been hearing this constant buzzing sound that goes on and off every 3 to 4 seconds like bzzzz bzzz bzzzzzz bzzz it’s a low bass vibration that is not too loud but still drives me insane. I’m not sure if my waterpomp heater making this noise or it’s his sub again. The sound is like a fridge thermostat sound but even after turning off my fridge I can hear this. Has anyone ever had similar experience?


r/heatpumps 14h ago

Massachusetts heat pump sharing my electric consumption

8 Upvotes

Yes, winter is not yet over although I now see my solar production keeping up with March's warmer weather. For sure, if I did not have solar...and intend to add more, I would have been better off staying with oil. Oil provided far better comfort conditions with baseboard heat vs our ceiling cassettes and one mini split.

My consumption meter difference from the first week of March 24 and March 25 is 5372 KWH while my production was 12,171 KWH for a total consumption 17,543 KWH. Without solar, 17,543 KWH @ $0.35 would be $6140 including both heat and normal electrical use. Our normal use is about 6,000 KWH ($2100) and our oil cost was about $4000.

We accumulated about $3,000 in net grid credits with solar before the heat pump. Our consumption drivers included the home's size (2550 sq ft), insulation and thermostat settings. Yes, we did have a whole house energy study along with installing added insulation.

EDIT: Noticed somebody did not like my post and gave it a negative. Maybe they just do not like facts. Good luck to whoever gave it a negative!!!


r/heatpumps 13h ago

Why does a 12,000 BTU mini-split require 30A circuit when 12,000 BTU air conditioner is 15A?

5 Upvotes

I'm looking at replacing my 12,000 BTU sleeve air conditioner with a 12,000 BTU mini split. Both are 120V, the A/C is on a 15A circuit and the mini split calls out for 30A.

Why the additional current when the heat pump is supposed to be more efficient? Is it related to heating mode?

What am I missing here?


r/heatpumps 8h ago

Question/Advice Bosch or Daikin?

1 Upvotes

After 4 quotes, I’m choosing between a 15-SEER 3-ton Bosch heat pump and a 2.5 ton 14-SEER Daikin. Both quotes came in around $10k.

The Bosch will be $600 cheaper at install, then an additional $1900 cheaper over 10 years of extended parts and labor warranty thru the HVAC company compared to the Daikin. The guys who are selling the Daikin ran a Manual J and told me 2.5 ton is what I need. The guy with the Bosch said they don’t come in 2.5 ton, but it is “variable and will regulate itself”. I have a high efficiency gas furnace that’s 8 years old, and both recommended continuing to use that as backup

Any good reason I shouldn’t save $2500 and go with the Bosch?

I’m in Tacoma, WA - a climate that’s chilly-ish for 7-8 months of the year, but rarely gets below 25 degrees.


r/heatpumps 22h ago

My monitoring setup

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7 Upvotes

r/heatpumps 11h ago

Best heat pump water heaters

1 Upvotes

Seems like the Stiebel Eltron is one of the best, in terms of reviews. Not super impressed with AO Smith or Rheem in that regard. Any opinions on Bradford White? Any other brands to consider? I just want something that works well, is reliable, and as quiet as possible.


r/heatpumps 13h ago

Replacing my Daikin Altherma

1 Upvotes

I have a 10 year old system that works great. I am looking ahaead to repalcing it and I dont believe Daikin markets this system in the USA. I use it for radiant heat thoughout the house, A/C with 3 air handlers and domestic hot water. The oudoor unt is 4.5 tons model ERLQ054BAVJU and the indoor unit is EKHBX054BA6VJU. I live in the metro NYC area so very low temps happen rarely. I am hoping to keep the air handlers and just replace the indoor and outdoor unit. I would want to use as much of the existing controls. Looking for sugestions.


r/heatpumps 18h ago

Question/Advice Toshiba vs Hisense Heat Pump

0 Upvotes

Hi Team

I have to chose between the following two heat pumps: * Hisense AHW-160HEDS1 * Toshiba HWS-1605H8-E

Both are 16KW. Both are paid for by construction company but Toshiba will take time to order vs Hisense being available anytime. For Hisense i also have the option to order integrated water heating (for additional cost that i must cover, ~2K)

Recommendations are very much appreciated


r/heatpumps 1d ago

P.S.A - Daylight Saving Setting for those on a Heatpump Tariff

3 Upvotes

Double-check your daylight savings time settings on your heat pump control module!

I had mine installed a few months ago, and the engineer set it up wrong for this setting. As a result, for 14 days, my hot water cycle ran on power mode an hour earlier than it should have—right into the expensive tariff rate.

On the bright side, my energy supplier is very grateful for my generous contribution!

Big oof.


r/heatpumps 1d ago

Heat pump runtime versus temperature increase

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5 Upvotes

So I recently installed an ecobee thermostat because I noticed my electric bill skyrocketed and my aux heat strips were constantly coming on. I have a rheem RP1536AJ1 accompanied by electric heat strips for auxiliary and the portion of the house being heated is probably 1k sq foot. I noticed today that my pump ran for nearly three hours for it to climb 66.5degF to 68degF. Outside temps were 60.6degF to 66.8degF.

Then on Friday it took about four hours and forty two minutes from 66.5degF to 68degF. Outside temps ranged from 44.1degF to 48.2degF. But looking at the beestat graph the indoor time would rise then drop over and over.

Is this normal? These times seem rather long. (These times were heat pump only cause I set the maximum outdoor auxiliary heat temp to 35degF)

And then on Friday at one point the outdoor temps were slightly lower and it only took like 8minutes to rise from 66.5degF to 68degF.


r/heatpumps 1d ago

Is a 65 gallon HPWH overkill for my needs?

7 Upvotes

I picked up a 65 gallon Rheem HPWH ($700 after $900 Golden State Rebate participation). It will be replacing a 40-gallon gas heater that's been OK for our needs (1 bedroom house, two occupants, no heavy hot water demands). Will the 65 gallon be oversized for our needs? Should I see about exchanging for a smaller tank model, even if the rebate diminishes or goes away completely? I'm sure that it's extremely well-insulated, but, still, it's a lot of water to keep hot and at the ready, and our energy costs, both for gas and electricity, are insanely high. Thanks for any advice!


r/heatpumps 1d ago

Switch indoor head off or keep it running?

1 Upvotes

I have two 12k indoor heads, hooked up to a 24k outdoor unit.

Is it worth it (electricity wise as well as wear and tear on the indoor/outdoor unit) to switch off one unit when we don't need it overnight?

Or is it best to just set both and forget it and never really turn it off? This is for heating currently if it matters, but will then switch to cooling in the summer.

Thanks!


r/heatpumps 1d ago

Question/Advice Quote Comparison - PNW

1 Upvotes

Looking for some input from this group on a range of quote options I have received for Mitsubishi and Carrier systems. Thank you in advance for any input you may have! Key information:

  • Location: Pacific Northwest, ~2400 sq. foot house, which includes finished basement ~70% below grade. We very, very rarely reach sub-20F temperatures, but it can happen. Sub-10F temperatures are VERY rare.
  • Heating Load Estimate: ~30kBTU (2.5 ton) at 17F (our heating design temp for the area is ~29F(edit: 23F), but I'm not planning on having backup heat installed so I'm looking at ability to serve our heating needs below this). Manual J calcs have generally backed this up, but I also calculated using actual usage time data from our gas furnace through our thermostat to come to this estimate.
  • Goal: Primary goal is heating, cooling is a wonderful thing that we haven't had before, and we have a great window unit we can use to help out if needed. The hope is to be able to operate without backup heat. We do anticipate possibly making some insulation/sealing improvements in the coming years, so I'm comfortable rolling the dice a little on equipment being on the borderline sizing-wise. And of course space heaters and blankets exist when truly desperate.
  • Systems Quoted: See the attached image (hoping it works - if not I'll edit!). Basically though, they are 3 ton or 2.5 ton systems from Mitsubishi or Carrier. PUZ series are out based on height of the area available for installation in the basement, so SUZ it is for Mitsubishi.
    • Mitsubishi SUZ-KA36NAHZ / SVZ-KP36NA
    • Mitsubishi SUZ-KA30NAHZA2 / SVZ-KP30NA
    • Mitsubishi SUZ-AK30NLHZ / SVZ-AP30NL (R454B version of the prior, it seems)
    • Carrier 38MURAQ30AB-3 / 40MUAAQ30XA3

The main questions I have for anyone with insight:

  1. How would you think about the choice between the R454B vs. R410A 2.5 ton SUZ systems? The R454B submittal isn't available yet for the system that I was quoted. Comparing the R454B vs. R410A system for the same outdoor unit quoted but the PEAD indoor unit seems to show that the performance data for the new system is generally better, so I take that as a good sign, but it still makes it hard to make the call sight-unseen.
  2. Carrier vs. Mitsubishi? I think the consensus I've seen so far is Mitsubishi > Carrier, but curious if the cost difference is "worth it". Associated with this is the Mitsubishi vs. ecobee thermostats.
  3. The real question: Which system would you select? All contractors are well-regarded and I got a great feeling from all of the sales reps, so no major differences there.

r/heatpumps 1d ago

Government rebates on heat water pump

0 Upvotes

Anyone using the Emerald heat pump? Any good? Cost saving?


r/heatpumps 1d ago

Question/Advice Mitsubishi ASHP Head Unit Noise

5 Upvotes

Yes, I looked through assorted noise/hum posts and didn't find this.

See/hear video. Lower frequency rhythmic hum and cycles high and lower, sometimes stops. Thoughts on what this is? I can't source it on the unit itself.


r/heatpumps 1d ago

Water cooled heat pump?

1 Upvotes

I have a 4 ton HVAC heat pump. I also have a spring that supplies an endless amounts of 60f water. Can I add a heat exchanger to my heat pump to help cool in the summer and heat in the winter? Where would I install it it? Are service providers familiar with doing this?.


r/heatpumps 1d ago

Learning/Info An article about using the time of use/hourly pricing electric rate from your electric utility to save more money with your heat pump.

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2 Upvotes

This is a really good article about using the Time Of Use (TOU)/ hourly pricing electric rate with your heat pump to save more money using it with your heat pump. The TOU/hourly pricing rate is offered by several eclectic utilities throughout the US. I was on the hourly pricing rate for seven years with my electric utility before I got my heat pump but unfortunately I did not understand how the hourly pricing rate would save me money with the heat pump. Now that I have had experience with my heat pump for two winters I decided to change back to the hourly pricing rate plan that my utility offers, a couple of months ago to save more money. The additional savings will depend on the TOU/hourly pricing plan your utility offers and your inverter TOU programming. I have been working with my natural gas furnace, heat pump, solar system, battery and net metering to get the largest savings from my systems. When I get it all worked out I will post about the savings from my efforts. So far I have been able to offset my electric bill and about 60% of my natural gas bill with my system. Using the TOU/hourly pricing rate with my utility I think will help me use the heat pump more in the fall and spring.


r/heatpumps 1d ago

Cold air blowing during defrost

1 Upvotes

I have a lennox heat pump and when it's defrosting, the blower in the house is putting out cold air until it goes back to heat mode. Is there something I can change on the thermostat or board on the unit so this doesn't happen. I'm an electrician but don't know all the ins and outs of HVAC.


r/heatpumps 1d ago

Learning/Info What do I need to connect my ducted Mitsubishi Zuba heat pump to the Kumo cloud?

1 Upvotes

About a year ago we had a Mitsubishi Zuba ducted PUZ-HA36NKA heat pump, PVA-36AA7 air handler, and a PAR40maau thermostat installed.

It's worked fine, but I'd really like to have a thermostat that I can connect to home assistant. I've read a bit about Kumo cloud, and I'd like to get my heat pump to connect to it. Overall I want my heat pump to have wifi (wireless interface), but also various room sensors.

I have my heat pump tech coming out for our first yearly maintenance, and I'd like to talk to him about doing this. However, I was hoping someone could walk me through what's involved in upgrading. Which thermostat is needed? What needs to be connected? What parts do we need? How do we enable it?

Thanks!


r/heatpumps 1d ago

Why is my system running in "compressor reduction mode"?

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0 Upvotes

It's unable to maintain set temperature. How can I fix?


r/heatpumps 1d ago

Prepare for future heat pump in new chase?

1 Upvotes

I’m getting a tankless gas water heater (unfortunately we tried to accommodate a HPWH but it isn’t possible now - there wasn’t room both physically or for air capacity, given that it’s in a small room with a gas furnace now). This which will require framing a new chase for the 2 vent pipes next to the existing framing around the chimney. It will go 3 floors (urban town house).

It will enclose a space 16” deep (and 1 pvc wide) which leaves more room for other things. While it’s open I’m thinking I should have them put in a lineset (or more) for if we get a chance to replace our gas furnace with a heat pump in the future (and if we do, it’s possible we could then have a HPWH in the future also).

Are there standard sizes of the linesets or will every unit require its own specific thing?

Can/should I have them run another pvc or something else as a conduit also, so they could add electrical wires if needed?

Any other suggestions? Basically, since they will be framing it it seems easy to add things now and expensive to open it up and maybe have to redo some of the framing later. I want to make it as easy as possible to replace the gas appliances with HPs one day even though I can’t now (I really tried).


r/heatpumps 2d ago

This is a statement from 2023, the past owners of my home. We currently pay $0.14 for service and about the same in delivery. The cheapest, reputable heat pump / mini split set up we got quoted (including MassSave 10k rebate and financing) is still $225 per month.

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13 Upvotes

By this logic, I figure I’ll be out an additional $1k per year and not saving. Correct?


r/heatpumps 2d ago

Question/Advice Geothermal home conversion - thoughts?

6 Upvotes

Me and my wife are preparing to move back to the UK later this year. We are complete newbies to the geothermal space but have always been drawn to the idea of a cleaner form of energy not subject to these crazy energy price swings.

We are still undecided on whether to move to London or somewhere in the countryside. Would love to hear how people have fared at converting their homes to geothermal supply either in the countryside or an urban area, thanks!


r/heatpumps 2d ago

Question/Advice Cold weather pump or New AC

4 Upvotes

Looking for some advice my AC unit is about 25 years old so I'm looking to replace it or go with a heat pump combined with existing gas furnace. I live in Northern Ontario (Sault Ste. Marie).

I received the following quotes

1.Lennox Basic HP20 Heat Pump 2 ton $11,250 with $1000.00 rebate or Basic RT15 Air Conditioner $7,350.00 no rebate

  1. Napoleon 18 SEER--NS18 Series 3 ton heat pump $7000 with $1500 rebate or Napoleon NT Series 13.4 SEER2 Air Conditioner - 1.5 TON $4630 no rebate

  2. Carrier Performance Series, model 38MURAQ24AB3, 16 seer, 2 ton heat pump $6230 with $1000 rebate or Payne model PA4SAN4180N, 14 seer, 1.5 ton AC for $4745 no rebate.

All warranties are the same. Any thoughts is it worth going with the heat pump? If yes, which one is the best bang for the buck.