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Heat pump users noticing cheaper bills and warmer homes – study

theguardian.com

61–70 of 113 posts

Re: Heat pump users noticing cheaper bills and warmer homes – study

#61
post #47
post #30

Earlier quoted context omitted.

5 years look for me highly unexpected. Can you please detail the pump type and whether you get subventions for it?

This number is more or less the same in Norway as well for air-to-air pumps without subsidies. Keep in mind that oil/gas heating and such is not normal, we've used electricity and firewood for heating for the most part. So replacing electric heaters with a heat pump will drastically reduce electricity costs, improve air quality and improve heating. Really a no brainer.

Ok that makes sense then. Most people here will compare against an existing gas or oil heating installation I guess...

Re: Heat pump users noticing cheaper bills and warmer homes – study

#62
post #41

Earlier quoted context omitted.

Heat pumps work perfectly fine with radiator systems.

Can you link a drop-in heat pump replacement for my Vaillant gas boiler mounted in tiny apartment bathroom, which heats the radiators in the winter but also provides hot water year-round?

Yes. For example Daikin Altherma, but I'm sure that every brand has a compatible system

Re: Heat pump users noticing cheaper bills and warmer homes – study

#63
post #46

The headline doesn't match the article: of the three people interviewed, the first loved it, but taxpayers paid for hers. The second liked it, but doesn't know if he'll ever make the money back, and the third didn't like it.

Aren't they also inappropriate for showers, as in they can't heat the water fast enough for a hot shower? Feels like a poorly thought out panic solution here in the Netherlands, where they're saying they're going to shut off gas in n years (number keeps changing, because it's more of a scare tactic to get people moving).

A good heat pump water heater will have an insulated storage tank and backup resistance heat. Ours has plenty of water for a long shower but if you drain it faster than it can pull heat out of the ambient environment, the resistive heat kicks in (you can disable this if wanted) and you’ll continuously get warm water. We generally only notice that with guests in the winter - in the summer, it’s basically free since we’d be using the main heat pump to cool the house anyway.

Re: Heat pump users noticing cheaper bills and warmer homes – study

#64
post #15

Earlier quoted context omitted.

The OP did a bad job but here are my guesses. Most traditional UK homes do not have central air, they use boiler/radiator systems for the winter. Retrofitting these homes do have central air with a heat pump probably does not make sense. I don't think the product the OP linked was a very good example either. It's just an electric boiler that somehow stores offpeak energy to be used during the day. Don't know a lot ab…

No, that isn't accurate. Air to water heat pump systems can be incredibly efficient and effective, even if the insulation isn't great. Flow temperatures are usually lower than gas boilers, so sometimes radiators need to be upgraded to larger ones but with a good quality heat pump and proper setup (weather compensation being a big one) there actually are few problems. There is a huge education gap unfortunately, since…

I think you are replying to the wrong thread? I never argued that they would never work, I am a big proponent of heat pumps. Just taking a stab at why the OP thinks they are not good for UK. Retrofitting older UK homes probably takes more steps than what the government grants are providing.

Thanks for the information though.

Re: Heat pump users noticing cheaper bills and warmer homes – study

#65
post #5

I thought this was a new kind of air-source heat pump without all the problems of existing ones, but no, it's just a heat pump. Inappropriate for many (possibly most) dwellings in the UK, and the government is bribing people to install them. For what it's worth, I think systems like https://www.tepeo.com/the-zeb will eventually replace gas in the UK, not ASHPs. Similar technology is being trialled at some army barrac…

The-ZEB are very thin on the details, is there a technical description of how it works?

Re: Heat pump users noticing cheaper bills and warmer homes – study

#66
post #48
post #3

I don't doubt that heat pumps are cheaper than gas bottles for a moment, especially in Europe, but it sounds like they also added a bunch of insulation at the same time as installing the heat pump. Anyway, newer heat pump systems are great. I'm low-key hoping the 13 year old gas furnace in my attic kicks the bucket so I can replace it with another of the same system we use to heat/cool the downstairs.

If it kicks the bucket in winter you'll be in a bad place. On top of it, our local laws (Swiss) forbid you replacing old tech, so you will have to go immediately through the hoops of quickly installing a heat pump of sorts (good luck with that).

I'm in the US, my downstairs gas package unit actually stopped working in November and we had a new system installed within a week of accepting the offer.

Re: Heat pump users noticing cheaper bills and warmer homes – study

#67

Earlier quoted context omitted.

I'm not sure whether your question is some kind of flippant accusation, but in case you're being genuine: I think the poster you quoted is saying something like: if I could afford to do the right thing for the planet, I would - but I cannot afford to and am forced to do something which I know is detrimental.

> kind of flippant accusation No. I rather meant to indicate that it might have been a good decision. There are some studies here from Germany that suggest that heat pump systems can lead to higher total CO2 emissions than using alternative systems. (I think it was compared to an infrared heating system with solar installed.) A high price of the hardware itself and the associated costs of installing and maintaining s…

> There are some studies here from Germany that suggest that heat pump systems can lead to higher total CO2 emissions than using alternative systems.

Were these studies, or "studies" that were effectively marketing for Russian supplied gas, which until two years ago was a state level foreign policy goal, complete subsidies that advantaged fossil fuel heating and local politicians getting kickbacks from "interested parties" on the side.

Similar to the sugar industries and their "studies" about fat.

Re: Heat pump users noticing cheaper bills and warmer homes – study

#68
I'd love to know more detail on the insulation as I live in a Victorian stone building. One person says "external walls internally insulated [...] and the loft insulation improved, a process she describes as “very invasive” but worthwhile." Presumably they're stripping off the internal lath-and-plaster from external walls then replacing with insulation-backed board. Maybe the the new room size is smaller meaning any plaster cornicing has to be ripped out/replaced. I can see why she calls it very invasive. Personally I find draughts to be a huge problem. When it's cold and windy it's especially cold inside. But I don't know how to fix draughts without risking dampness or rot - never found any government guidance on this. It's a huge pain and I am not sure there is an easy "insulate" solution for these old properties.

Re: Heat pump users noticing cheaper bills and warmer homes – study

#69
post #67

Earlier quoted context omitted.

> kind of flippant accusation No. I rather meant to indicate that it might have been a good decision. There are some studies here from Germany that suggest that heat pump systems can lead to higher total CO2 emissions than using alternative systems. (I think it was compared to an infrared heating system with solar installed.) A high price of the hardware itself and the associated costs of installing and maintaining s…

> There are some studies here from Germany that suggest that heat pump systems can lead to higher total CO2 emissions than using alternative systems. Were these studies, or "studies" that were effectively marketing for Russian supplied gas, which until two years ago was a state level foreign policy goal, complete subsidies that advantaged fossil fuel heating and local politicians getting kickbacks from "interested pa…

> Were these studies, or "studies" that were effectively marketing for Russian supplied gas

I guess your next comment will be that the Fraunhofer Institut has been infiltrated by Russians?

https://www.ibp.fraunhofer.de/content/dam/ibp/ibp-neu/de/dok...

And here's a video with all the information on different studies, universities and companies involved. This is basically a guy helping german real estate companies to survive in the current environment. It's in German. Translate it for yourself:

https://www.youtube.com/watch?v=pRe_Fu28CQs

Re: Heat pump users noticing cheaper bills and warmer homes – study

#70

I'd love to know more detail on the insulation as I live in a Victorian stone building. One person says "external walls internally insulated [...] and the loft insulation improved, a process she describes as “very invasive” but worthwhile." Presumably they're stripping off the internal lath-and-plaster from external walls then replacing with insulation-backed board. Maybe the the new room size is smaller meaning any…

You can probably buy "draft sticks" or something similar. They put out a little bit of smoke that you can use to find the source of your worst drafts so you can get them sealed.
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