I’ve actually learnt something concrete. The outside unit requires a concrete base. So, there is a non trivial installation cost not required for a gas boiler. The outside unit will need an electrical connection, presumably it’s own ring main, so there is another cost. I’ve seen estimates of about £500 for a new ring main, so add on a bit more to take it out to the heat pump. Obviously the radiators might not be adequate, but let’s assume they are as a starting point. Can the heat pump just connect directly to the existing 15 mm heating water circuit? There will need to be some form of pressurisation mechanism for the closed water circuit. A hot water cylinder will be needed if not already present, it’s easy to find rough costings for that. The quotes I got online assume, unless i am mistaken, adequate insulation. And obviously a bigger house needs a bigger heat pump.
That was my suspicion. The government and civil service in particular lack commercial experience, and regularly let industry walk over them. You just have to look at huge projects that either failed or hugely overran costwise. I worked in companies that employed shiny suited spivs to sell projects to the civil service. They made promises they could not keep which is why they often failed. Anyway, the point of this rant is that politicians want to achieve net zero, and so they throw public money at private companies hoping that they will create an industry and prices will come down. At £12,000 before the grant for a modest 3 bed house, the heat pump just will not take off. The government can’t continue to throw £7,500 subsidies of public money at homeowners. At present we have about 50,000 a year, so 100 years to reach 5 million. Installing in new builds, which is now obligatory, makes sense.
They had expensive schemes to encourage solar cell use, but in the end it was cheap imported cells from China that caused the market to surge, and now they are seen as an investment so it is perhaps questionable if they should have spent so much of our money subsidising solar when it would take off anyway. Similarly, should they be subsidising home heat pump installs?
I’ve ordered a brand new EV because I get a £3,750 discount from His Maj’s government. That is £3,750 in my pocket from you so I can buy a nice car. Let me just say thank you for being generous. I came to the conclusion that an EV is now cost effective if you charge always or mostly at home. I considered solar cells, but the payback for a home install is too long for me, even though cells have come down massively in price. I prefer the stockmarket. They are though not a bad investment for risk averse homeowners.
I’m not looking to penny pinch, but there are questions with something like a heat pump. For example, will they remain expensive, or drop in price? I suspect it is currently a seller’s market and prices are high. And to attract people to go on training courses at their own expense, you need a financial carrot. So a nice profitable heat pump install trade is a good carrot to jump start the market, even though much of the work is just standard plumbing and electrics.
I would prefer an air to air heat pump, but the subsidy is only £2,500.