I knowthat the Honeywell controller isn't the best but the LG is a split unit with a heat store in the loft that has the controls in it, was told by the engineer that repaired it last year that you can move this control box with 2 core cable or ethernet(just using 2 wires) but I haven't got around to that job either.
Heat Pumps: anyone have one/thought about it?
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Just nearly fell off my chair when I got a heat pump quote from Octopus purely out of interest. It came back at just £604 after the grant!
We live in a 4 bed detached new build built in 2019. Its pretty well insulated as we only use 7500kWh of gas per year with the current combi boiler. I'm guessing with it being a 2019 build the radiators should all be up to scratch?
Perhaps I'm missing something but surely it's a no-brainer at this price, especially with having solar/battery already (and a 6p/kWh EV tariff)?
We live in a 4 bed detached new build built in 2019. Its pretty well insulated as we only use 7500kWh of gas per year with the current combi boiler. I'm guessing with it being a 2019 build the radiators should all be up to scratch?
Perhaps I'm missing something but surely it's a no-brainer at this price, especially with having solar/battery already (and a 6p/kWh EV tariff)?
Better than my quote 
I did speak to another installer in my area this week, basically the 10mm pipework is likely to be problematic, best to repipe rather than having a compromise. Would mean major destruction inside the house so looks like it's a no go.
I did speak to another installer in my area this week, basically the 10mm pipework is likely to be problematic, best to repipe rather than having a compromise. Would mean major destruction inside the house so looks like it's a no go.
I had my house visit on Tuesday and my quote was £500 after grant, no changes to plan but other than the radiators most will need to changed the single rank to double rank, our house was built in 2012. Just waiting on install date now, can’t wait to lose the sound of the gas boiler.
Heat pumps typically outlast their gas cousins.
But when it does go pop, you can go to city plumbing buy one off the shelf and install it yourself. No certs required, might need to big blokes to help you lift it into place!
I think my Daikin is about £4K off the shelf inc VAT.
Once the warranty is done, I’ll not bother getting it serviced either. Servicing is simple, no certs needed either.
What’s your heat loss?Better than my quote
I did speak to another installer in my area this week, basically the 10mm pipework is likely to be problematic, best to repipe rather than having a compromise. Would mean major destruction inside the house so looks like it's a no go.
10mm is absolutely fine if your heat loss is on the lower end. Sure you’d probably get slightly better COP after re-piping but it’s not something you’ll ever get back via lower running costs given how much it will cost to do every room in 15mm.
No brainer really. They’ll probably be a few rad swaps as I don’t think the low temperature heating requirement came in until very recently.
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Soldato
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Heat loss is not that low. My estimates in heatpunk reckons in the 8kw range. It's also not all about running costs, the 10mm pipe runs are quite long and i know for a fact a lot of it is kinked on the bends thanks to whoever built the house, the advice is it would be better to replace.
It's not plastic, it's 10mm copper that comes in coils. It's very easy to kink if they try to bend it tightly without using a former.
A bit like this stuff https://www.screwfix.com/p/wednesbury-microbore-copper-coil-pipes-10mm-x-25m/17717
A bit like this stuff https://www.screwfix.com/p/wednesbury-microbore-copper-coil-pipes-10mm-x-25m/17717
That makes more sense and yes, I can see how that’s far easier to kink than plastic. I’d have doubts that plastic would even survive without splitting!
I assumed it was plastic as that’s what most is done in these days and probably why I was a bit confused there
I assumed it was plastic as that’s what most is done in these days and probably why I was a bit confused there
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just happened to look in this thread and see the mention of the octopus quote.
ive just checked and it reckons £500 to get a heatpump installed.
our house is 6 years old and pretty well insulated. do they really save a lot of money? our gas and electric currently is about £130pm
ive just checked and it reckons £500 to get a heatpump installed.
our house is 6 years old and pretty well insulated. do they really save a lot of money? our gas and electric currently is about £130pm
If you are using flat rate electricity at the price gap, no, it will cost roughly the same to run because electricity costs 4X gas.
However if you use a time of use tariff or solar or solar and batteries you can save money, potentially a material amount of you have all 3.
I can push between 30% and 45% of my demand off peak in winter at 7p/kwh 23:30 and 05:30.
Take today for example, it’s a cold day, my heat pump used 26.8kwh, 10.3kWh of that was between 00:00 and 05:30 at 7p/kwh (38.4%) costing 72p.
The rest in theory cost £4.45 but that’s before you factor in solar and batteries, I generated 6.6kwh today and I’ve got a 13.5kwh battery which I also charged at 7p.
In total I used 39.2kwh for everything but only 32.6kwh was from the grid. 6.85kwh was at 27p, 25.75kwh was at 7p so my bill for today was £3.65 or 11.1p/kwh.
However if you use a time of use tariff or solar or solar and batteries you can save money, potentially a material amount of you have all 3.
I can push between 30% and 45% of my demand off peak in winter at 7p/kwh 23:30 and 05:30.
Take today for example, it’s a cold day, my heat pump used 26.8kwh, 10.3kWh of that was between 00:00 and 05:30 at 7p/kwh (38.4%) costing 72p.
The rest in theory cost £4.45 but that’s before you factor in solar and batteries, I generated 6.6kwh today and I’ve got a 13.5kwh battery which I also charged at 7p.
In total I used 39.2kwh for everything but only 32.6kwh was from the grid. 6.85kwh was at 27p, 25.75kwh was at 7p so my bill for today was £3.65 or 11.1p/kwh.
Soldato
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Valliant heat pumps with Ovo have price fixed at 15p per KWH if it is of any consequence to people, 40% discount on standard tariff
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Octopus also have an interesting tariff aimed at heat pumps also. You get 3 periods totalling 8 hours through the day where all your electricity is 12p and one 3 hour period which is above the price cap over the evening peak.
The idea is that you gobble up as much energy as possible during the 3 cheap windows and turn the heat pump off over the evening peak. It’s pretty handy if you have batteries, even relatively small ones.
If you have an EV or large batteries, you may be better off on Intelligent Go/Regular Go but it depends on your usage profile.
Soldato
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This is the huge issue with heat-pumps. It's not that they don't work, like some claim, it's that a lot of British homes need some fairly major changes... and that costs. Many British homes were built with inadequate insulation and small bore central heating. The cost of insulating the house, re-piping the property and fitting new radiators means it's just too expensive for many people, even given grants. Its different if their boiler has worn out, but it dissuades those who just want to go green.
There are heat-pumps that provide warmer water, they are less efficient.
There are some properties in the UK that are very suited to heat-pumps. Mainly more recent builds. But for many, they are not a particularly attractive option.
Soldato
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Yes, quite a few incentives for early adopters at present to mitigate some cost with a bit of planning. As above, if you can get a heat pump at £600 and it has a COP of 4 then you are on par with gas and drop a £10 per month standard charge. If you get a 40% discount on the heat pump supply then you could cover the £600 within a year of the change. No guarantee such an incentive lasts forever, but it can accelerate savings to offset the upfront. If you already have a battery and solar it is a no brainer.
Soldato
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I do agree. In the 90s a lot of the plumbing in larger estate builds went to crap, 8mm microbore saved pennies, 75mm cavities (when winters were colder!) etc.... Makes difficult to update buildings.
We are building our own house now, and self builders require more stringent efficiency make-up than Taylor Wimpy, Redrow etc... despite these guys having huge economies of scale. They should be held to a higher standard than individuals, but it will never happen!
I do plan to get solar and battery storage but not for 2-3 years.
I'm on a fixed tariff until sept with no time of use periods.
Currently paying 22.44p for electric and 5.5p for gas
Outside of the 3 winter months we use 20p-30p per day of gas. During the winter months the heating is on maybe 3 hours per 24h
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