Air-source heat pumps - are they good/crap?
Discussion
hidetheelephants said:
monkfish1 said:
Lots of people getting very wealthy off the back of the taxpayer.
They're getting rich because like every other govt scheme it encourages rentseeking; don't subsidise the installation, subsidise the material. Every f
king time it's the same st; solar panels, insulation, woodchip boilers.My neighbour did ASHP + solar + Nordic style air circulation/filtering/heat transfer in a 30's house.
It took a LOT of effort on behalf of the builder to insulate the place and especially to make it genuinely air tight but it all seems to work fine now.
In the hot spell in the summer he did mention that they were gasping and had to have all the windows open all the time :-)
It took a LOT of effort on behalf of the builder to insulate the place and especially to make it genuinely air tight but it all seems to work fine now.
In the hot spell in the summer he did mention that they were gasping and had to have all the windows open all the time :-)
Equus said:
Evanivitch said:
Seen any movement on continental style window shutters and canopies? Seems like the simple mechanical fix.
They are one of the solutions allowed by the Approved Document.Unfortunately, Planning trumps Building Regs., and the Planners have been given a different hymn sheet to sing from.
A similar thing is listed buildings that can have double glazing. But at the same time we should have lower energy use
And solar that the government want you to have but also needs planning ( I think )
My last house was well insulated and would overheat. This one let's see. We have however air conditioned it as I don't like getting hot !
I’m currently considering an ASHP for a period property…we’ve just had new double glazed windows installed. External doors are either being professionally draft proofed or replaced. A couple of rooms which are colder will be getting internally insulated. We need to do all that regardless of whether we go with ASHP or Gas Boiler or a hybrid system (it’s a big house).
There’s some good advice on here OP. The things I would ask are
- Who specified the heat pump
-Ask to see those calculations
-What other work was done when the heat pump was installed. Rads and possibly larger bore pipes may have been needed. Any insulation ?
-What CoP is the heat pump currently working at. An average of 3 is about right across the year.
The main driver for us looking at one is that we’re getting a fairly large ground mounted solar system with batteries. That potentially means we won’t be buying electricity for half the year and when we do it will be overnight on a tariff of below 10p kWh.
My personal view is as well as throwing subsidies at the problem we’re going to see a change in the pricing differential for electric and gas to make the former more attractive for heating the home. It is only going to get relatively more expensive to heat your home burning gas.
There’s some good advice on here OP. The things I would ask are
- Who specified the heat pump
-Ask to see those calculations
-What other work was done when the heat pump was installed. Rads and possibly larger bore pipes may have been needed. Any insulation ?
-What CoP is the heat pump currently working at. An average of 3 is about right across the year.
The main driver for us looking at one is that we’re getting a fairly large ground mounted solar system with batteries. That potentially means we won’t be buying electricity for half the year and when we do it will be overnight on a tariff of below 10p kWh.
My personal view is as well as throwing subsidies at the problem we’re going to see a change in the pricing differential for electric and gas to make the former more attractive for heating the home. It is only going to get relatively more expensive to heat your home burning gas.
Evanivitch said:
monkfish1 said:
No, really they havent.
Weird you post this denail then a caveat you could drive a bus through. There are millions of decent enough modern homes in the UK that can take a heat pump fine. Stop acting the fool.Notsofastfrank said:
The house is 3000 square feet and we pay £110 pm with the assistance of 7kw of solar panels and a 5kwh battery, without the solar/battery the cost would be about £225 a month. .
I found this an interesting number. I have an 11,000 sq ft new self build. Gas boiler ( very small ) underfloor heating and well insulated ( building regs give you no choice). The Sap calcs last week gave it epc B so very good but not a passivhaus ( which we never set out to do ).
Our gas bill is £350 per month. The house is set to 22 degrees for the day and 18 at night but never drops more than about 1.5 degrees over night and that is only if really cold.
The ground floor heating is on. The first floor only in the bedrooms in use and the top floor is all off as it does not need it on and would overheat if it did.
We looked at ground source heat pump - they wanted £90k!!! I did not look at air source as a friend has one he described as being like a jet engine when running. The cost I imagine would have been £20k plus.
Our boiler is an Atag i 140r which is £1200. Gas if you have it is a no brainer.
Cheib said:
I’m currently considering an ASHP for a period property…we’ve just had new double glazed windows installed. External doors are either being professionally draft proofed or replaced. A couple of rooms which are colder will be getting internally insulated. We need to do all that regardless of whether we go with ASHP or Gas Boiler or a hybrid system (it’s a big house).
There’s some good advice on here OP. The things I would ask are
- Who specified the heat pump
-Ask to see those calculations
-What other work was done when the heat pump was installed. Rads and possibly larger bore pipes may have been needed. Any insulation ?
-What CoP is the heat pump currently working at. An average of 3 is about right across the year.
The main driver for us looking at one is that we’re getting a fairly large ground mounted solar system with batteries. That potentially means we won’t be buying electricity for half the year and when we do it will be overnight on a tariff of below 10p kWh.
My personal view is as well as throwing subsidies at the problem we’re going to see a change in the pricing differential for electric and gas to make the former more attractive for heating the home. It is only going to get relatively more expensive to heat your home burning gas.
Are you able to give an indication of total costs of all that work? And size of house to give some perspective?There’s some good advice on here OP. The things I would ask are
- Who specified the heat pump
-Ask to see those calculations
-What other work was done when the heat pump was installed. Rads and possibly larger bore pipes may have been needed. Any insulation ?
-What CoP is the heat pump currently working at. An average of 3 is about right across the year.
The main driver for us looking at one is that we’re getting a fairly large ground mounted solar system with batteries. That potentially means we won’t be buying electricity for half the year and when we do it will be overnight on a tariff of below 10p kWh.
My personal view is as well as throwing subsidies at the problem we’re going to see a change in the pricing differential for electric and gas to make the former more attractive for heating the home. It is only going to get relatively more expensive to heat your home burning gas.
Ive done some rough work for mine, Half period stone, half 70's cavity wall. Even doing all the work myself, i think its £35-45K all in. And its only a small place. Not factored in that we will need to move out as well.
Just curious how you make it work? I can buy a lot of oil for £40k
eniacs said:
140m2 detatched house, some double - some triple glazing, cavity insulated and externally insulated too. Solar panels and battery with EV tariff.
Not exactly your typical UK house 
.I'm 100% sure ASHPs work fine if you insulate well, but why bother when gas works just as well with good insulation? With the way global weather is going, having AC is going to be far more important (maybe some flood defenses).
monkfish1 said:
Evanivitch said:
monkfish1 said:
No, really they havent.
Weird you post this denail then a caveat you could drive a bus through. There are millions of decent enough modern homes in the UK that can take a heat pump fine. Stop acting the fool.Jeremy-75qq8 said:
Our gas bill is £350 per month. The house is set to 22 degrees for the day and 18 at night but never drops more than about 1.5 degrees over night and that is only if really cold.
I like it warm but if they're the actual (not the random temps thermostats often give) then they're pretty warm! Wonder how much your gas consumption would drop if you knocked a degree off?
Evanivitch said:
monkfish1 said:
Evanivitch said:
monkfish1 said:
No, really they havent.
Weird you post this denail then a caveat you could drive a bus through. There are millions of decent enough modern homes in the UK that can take a heat pump fine. Stop acting the fool.Its says "from" £500. Oldest marketing trick in the book. Almost no one will get that.
If they did, every other installer with their £10k+ quotes would be out of business overnight.
Sheepshanks said:
I like it warm but if they're the actual (not the random temps thermostats often give) then they're pretty warm!
Wonder how much your gas consumption would drop if you knocked a degree off?
All of the stats have been calibrated off one mobile stat ( they were all over the place ). I have no idea of course how accurate the " reference " stat is - I just wanted them all correct relative to each other. Wonder how much your gas consumption would drop if you knocked a degree off?
We have tried 21 and found it too cool.
monkfish1 said:
Are you that gullible?
Its says "from" £500. Oldest marketing trick in the book. Almost no one will get that.
If they did, every other installer with their £10k+ quotes would be out of business overnight.
Are you that pig ignorant? They are literally posts of people that have paid from £450 for octopus installs.Its says "from" £500. Oldest marketing trick in the book. Almost no one will get that.
If they did, every other installer with their £10k+ quotes would be out of business overnight.
Evanivitch said:
Are you that pig ignorant? They are literally posts of people that have paid from £450 for octopus installs.
To be fair, they quoted us 4.5k on top of the 7.5k grant.It seems to depend on the EPC that they pull up from the Government site, plus number of rooms I guess.
Evanivitch said:
monkfish1 said:
Are you that gullible?
Its says "from" £500. Oldest marketing trick in the book. Almost no one will get that.
If they did, every other installer with their £10k+ quotes would be out of business overnight.
Are you that pig ignorant? They are literally posts of people that have paid from £450 for octopus installs.Its says "from" £500. Oldest marketing trick in the book. Almost no one will get that.
If they did, every other installer with their £10k+ quotes would be out of business overnight.
So a few people have got that, on houses where everything was suitable to allow a low cost installation.
Its not, ever, going to be the "normal" price.
"If" this were "normal" how is anyone else in business? Answer, its not the norm.
If you want to believe that everyone can spend £500 with octopus and have a working heat pump system, you are welcome. Just the cost of the parts makes it impossible for most.
And we have not even touched on the running costs.
No ideas for a name said:
Evanivitch said:
Are you that pig ignorant? They are literally posts of people that have paid from £450 for octopus installs.
To be fair, they quoted us 4.5k on top of the 7.5k grant.It seems to depend on the EPC that they pull up from the Government site, plus number of rooms I guess.
If they are relying on the EPC to do the calcs, that isnt likely to end well in a lot of cases. Are you sure about that?
monkfish1 said:
How pleasant.
If you are going to outright lie and then call people insults then what did you want in return?monkfish1 said:
So a few people have got that, on houses where everything was suitable to allow a low cost installation.
Sounds.like a long way of saying "sorry I was wrong".monkfish1 said:
Its not, ever, going to be the "normal" price.
"If" this were "normal" how is anyone else in business? Answer, its not the norm.
Because we're all well aware there's a large grant involved. It's been discussed at length in this thread."If" this were "normal" how is anyone else in business? Answer, its not the norm.
monkfish1 said:
If you want to believe that everyone can spend £500 with octopus and have a working heat pump system, you are welcome. Just the cost of the parts makes it impossible for most.
I've never said anything of the sort. monkfish1 said:
And we have not even touched on the running costs.
You're just ignorant then? They've been discussed at length in this thread. Honestly, you do know how a forum works, yes?Gassing Station | Homes, Gardens and DIY | Top of Page | What's New | My Stuff