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Heat Pumps Are A “Frail Technology”

August 12, 2022

By Paul Homewood


  h/t Ian Magness


 This interview with the Technical Support Director of Worcester Bosch is a must watch for anybody who thinks heat pumps are a viable option.

The relevant segment starts at 170 minutes in:


  1. HotScot permalink
    August 12, 2022 3:48 pm

    17 minutes in.

  2. Peter F Gill permalink
    August 12, 2022 3:55 pm

    It is politicians who were history graduates, law graduates, English graduates etc that need to know this. I wonder if they feel motivated to hear a different (and realistic) view.

    • incywincysales permalink
      August 12, 2022 4:07 pm

      They wouldn’t understand.

    • A+man+of+no+rank permalink
      August 12, 2022 4:27 pm

      You cannot have a more simple and trustworthy appraisal of household heat pumps than that from Martyn and Roger. Even someone with a degree in ‘feelings’ must be able to understand this.

    • Gerry, England permalink
      August 13, 2022 10:30 am

      Don’t forget the magnificent PPE graduates – as per Sushi and Miss Trusted which says a lot.

      • Peter F Gill permalink
        August 13, 2022 1:35 pm

        Yes. Gerry, I was going to specifically mention PPE graduates but decided to simply stop with etc. From memory there were only about 5 MPs who opposed the Climate Change Act. I suppose I could have mentioned their disciplines instead.

      • John Brown permalink
        August 13, 2022 5:29 pm

        Even worse than the qualifications of the politicians Johnson, Kwarteng and Hands for making decisions on Net Zero is the lack of suitable qualifications of the senior employees of BEIS who gave evidence to the Public Accounts Committee on “Net Zero Follow-UP” : Sarah Munby, Permanent Secretary PPE/LSE Economics, Ben Rimmington Buildings & Industry Modern Languages and Lee McDonough drafted in from Health and Social Care. Even the scientific adviser is not an engineer but a professor of Atmospheric Chemistry and Earth Observation science.

  3. Malcolm permalink
    August 12, 2022 3:59 pm

    Exactly so. The Oxford PPEs are simply telling lies, either out of ignorance (most likely) or to deliberately fool the masses.

    (It starts 17 mins in.)

    • Chaswarnertoo permalink
      August 14, 2022 7:15 am

      Piss Poor Ejukayshun.

  4. August 12, 2022 4:17 pm

    That’s shocking. What planet to most of our MPs live on.

  5. HotScot permalink
    August 12, 2022 4:21 pm

    The practical application of heat pumps – rip your house to bits to get one in.

    I priced up for a ground source heat pump, full home insulation (9″ solid masonry walls), big radiators etc. and also priced up for a new kitchen, bathroom, carpets/flooring several years ago and for our very modest 3 bedroom Victorian cottage it was £100,000.

    The heat pump manufacturer told be they would decline to fit it as they were cautious about being sued for it underperforming. Another problem that goes unmentioned.

    This was about 5 years ago BTW.

  6. eromgiw permalink
    August 12, 2022 4:25 pm

    170 mins? It’s only 45 mins long!

    • HotScot permalink
      August 12, 2022 10:40 pm

      You didn’t read the first post on this thread, did you………….

  7. Martin Brumby permalink
    August 12, 2022 4:26 pm

    It would be a big improvement if anyone standing as an MP had to run a business (whelk stall? Tea cups roundabout?) for 12 months without going bust.

    And electorate aged at least 21 and able to work out the length of the hypotenuse of a right angle triangle with sides 3m and 4m.

    And have paid income tax for the last 12 months.

    It would be a start.

    • HotScot permalink
      August 12, 2022 4:46 pm

      That’s why Trump was targeted, he made the rest of them look bad.

      • Duker permalink
        August 13, 2022 9:17 am

        Trump paid tax ?

      • Chaswarnertoo permalink
        August 14, 2022 7:17 am

        Duker. Trump overpaid his due tax, by nearly a million dollars. Try facts instead of fweelz.

  8. John Hultquist permalink
    August 12, 2022 5:25 pm

    I thought the into to that, that included the word “tricky”, was spot on.
    Important points are that a house (on a lot; not an apartment of flat) is important. It should be built with air ducts designed for proper air flow. The talking heads disqualified many residential units. Absolutely true. Ground-sourced units ought to be avoided.
    I’ve had an “air sourced” one for 15 years — it replaced a combined air conditioner and electric resistance heater. The alternative energy would have been a big tank of propane in the yard. Most of these are white, but search up images with “painted propane tanks”
    My “outside” part of the heat-pump system looks like this:

  9. Charles permalink
    August 12, 2022 5:26 pm

    Suggest you also start at the beginning where Hydrogen boilers are discussed in some detail.

  10. GeoffB permalink
    August 12, 2022 6:16 pm

    Interesting but some of the comments are a year old, so it 2021ish. I have recently been trying to get info out of the consultants running the mentioned heat pump trial in Newcastle (Catapult) on progress and costs, but have been fobbed off that nothing is available, yet Martyn Bridges quoted statistics on take up and installation costs. Methinks it is a cover up, I will try again, anyone know how to make a Freedom of Information request?

  11. August 12, 2022 6:52 pm

    He talks of 100% hydrogen infrastructure. That’s a fool’s paradise. The hydrogen energy cycle is VERY inefficient, yielding only ~30% of the input energy; that’s~70% wasted. Not very “energy saving”! It also needs expensive high pressure storage and a brand new distribution infrastructure (hydrogen leaks very easily). Not exactly a good economic proposition.

    • Chaswarnertoo permalink
      August 14, 2022 7:19 am

      You can make a very good fuel with hydrogen. Just add a few carbon atoms, we could call it gas….

  12. August 13, 2022 12:15 am

    I think that the comment made about overloading the electricity infrastructure was spot on. If we force everyone to use electric cars and also electric heating, then the power grid that we currently have will not cope. We shall be into the business of a major upgrade of the local grid infrastructure. Expensive and very time consuming.

    • John Hultquist permalink
      August 13, 2022 5:11 am

      I think most Climate Cult™ members flunked arithmetic and do not have a concept of scale.

    • Dave Andrews permalink
      August 13, 2022 4:51 pm

      The UK has c. 300,000 Low Voltage (LV) substations and c. 1million feeders with about 450,000kms of buried cables. About 80% of this LV network is built for ‘lighting plus’ (c.1.2 kW) and not a load of 7kW EV or 9kW heat pump and would need to be replaced.
      This has in the past been estimated to cost £60billion and would involve digging up almost all the non motorway roads in the country.

      There is an interesting discussion between a person from v2g (Vehicle to Grid) and a Doctor of Engineering at Southampton University about this at

  13. Ray Sanders permalink
    August 13, 2022 8:58 am

    How Climate Cult™ members count…..”one, two, three,….erm….many?”

  14. Micky R permalink
    August 13, 2022 4:59 pm

    Is a small CHP scheme now financially viable for a few houses to go off-grid? I suppose that the risk is that it could be up and running and then the price of domestic energy tumbles.

  15. John Brown permalink
    August 13, 2022 5:34 pm

    Not really mentioned in this video is that it is not possible to use the existing natural gas grid for hydrogen. Hydrogen corrodes the steel pipes of the large gas piping. It requires 3/3.5 times the pressure to retain the same rate of flow of energy as natural gas and hence bigger pumps. And because it is a much smaller molecule than natural gas (methane) leakage control will have to be much better.

  16. MikeHig permalink
    August 15, 2022 9:45 pm

    No mention of NOx emissions……

    Aiui, a hydrogen flame is much hotter than methane which promotes NOx formation. A report for the government anticipated the need for some form of exhaust treatment, as with cars. Such a system would require annual testing, of course.

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