ASHP & triple glazing

[Joeboy]

Thanks JB that’s made it clearer for me, as Stinsy says once the stats start to accumulate at those flow temperatures you will climb up the tables and be comfortable at the same time !

Impressive

Moxi

No worries pal! I'm feeling like a traitor the noo. Dipped into unknown territory... Sorry Fintray!!!

[spread-tee]

Bloody hell Joe, Mrs Desp is well impressed with your journey after I mentioned it to her, so much so she says "maybe we should get a heatpump".................Shall I order one?? F**k and there I was thinking I'm too busy having cancer and restoring old motorbikes to take on YET ANOTHER round of bashing holes in cactusville .

Seriously though a huge well done for taking the plunge. now go and batter yourself around the head with a wet fag paper!!

Desp

[Joeboy]

Bloody hell Joe, Mrs Desp is well impressed with your journey after I mentioned it to her, so much so she says "maybe we should get a heatpump".................Shall I order one?? F**k and there I was thinking I'm too busy having cancer and restoring old motorbikes to take on YET ANOTHER round of bashing holes in cactusville .

Seriously though a huge well done for taking the plunge. now go and batter yourself around the head with a wet fag paper!!

Desp

Pmsl! Cancers a wanker, while we're all here around the campfire together let's give 2 fingers and a big Raspberry to all the monsters. THHHRRRRPPPPP!

I hope they've got you a good fighting programme arranged?

Incredibly low running wbs and rising outdoor temps have caught us out. 19.0 setpoint and house is now at 19.3 degs indoors!

Turning from.cop to cash. We had the EV charging last night at 3.5kW. So that's 3.5x5.5 (19.25) off the figure below.





To this point in the day, 32.65kWhs power to run the show.

Find the heatgeeks in your area desp. Do not accept less than a top flight install. Fintray led by example and I've tried to match that in my own build. Next up will be an A2AHP install in No1 son's house. But not today.

[Joeboy]

It's funny, I've just realised that low & slow at it's logical conclusion is the matching of heat out from property with heat in from the HP. Reduce all the on/off's to one long run. Can't do it in freezing conditions but possible in higher temps maybe?

That was a new thought for me.

[Ronski]

Find the heatgeeks in your area desp. Do not accept less than a top flight install. Fintray led by example and I've tried to match that in my own build. Next up will be an A2AHP install in No1 son's house. But not today.

I have a couple of Heatgeeks locally, I shall certainly see how much they are quoting, I'm prepared to pay more for a better install, but there are limits.

Yours seems to be ticking along nicely now, hitting the H 6 or D on your Emoncms link gives some nice graphs, and we all like a nice graph

[Joeboy]

Find the heatgeeks in your area desp. Do not accept less than a top flight install. Fintray led by example and I've tried to match that in my own build. Next up will be an A2AHP install in No1 son's house. But not today.

I have a couple of Heatgeeks locally, I shall certainly see how much they are quoting, I'm prepared to pay more for a better install, but there are limits.

Yours seems to be ticking along nicely now, hitting the H 6 or D on your Emoncms link gives some nice graphs, and we all like a nice graph

My bill came to £19,500

For that

£500 is the level 3 monitor system
£1000 went towards two specific tall vertical rads to qualify specific room area btu's where we had space retention req's.

That leaves an £18,000 bill which incudes a total of 11 radiator upgrades/fitting, a 7kW Valliant ashp, a 200ltr hwt, wall mounting that HP. Upgrading all upper floor flow and return pipes from HP to upper manifold and down to lower manifold to 28mm. Full insulation of same. A small CU extension, breakers, iso switch etc.

Of that £18,000 I have a grant for £7,500 so it's costing me £10,500 for the job before I add on my extras. That's a -4.75 deg based job on a 7.9kW heat loss calc. I didn't seek a 0% loan for the job but they are available.

Now I'm on the other side of the rabbit hole I can honestly say it is worth the upheaval. The groundfloor pipework upgrades are worth the other £1,500 I spent on extras, so I'd say that for £10,500 I've got a mint well specced, beautifully installed custom system that will save me a fiver a day for 20 years. That day price guess is purely a focus for the return that I gave no thought to during or before the build.

P.S that's £36,500 if it came through.

I did it for the craick, the comfort, the good old premise of "what if" and finally two fingers to all the dreadful people with no precog ability that can't put 2 and 2 together then get sold a basket of crap and bitch about it. The dreadful part comes through no due dilligence on what is a massive system in home.

I look forward to seeing what you get Ronski and if I can help in any way please ask. Plenty here will be willing to.

[Ronski]

Thanks Joeboy, I will post a thread up, probably after Christmas, still working through some things with my current heating system, got the 20yr old boiler running a flow temp of 45c or thereabouts, got some monitoring set up, and pretty much done heat loss calcs on Heatpunk.

Heatgeeks website assumes a heat loss of 11.2 kW, I've worked it out on Heatpunks at just under 7. Heatgeeks website estimate is £11K after BUS grant, hopefully it will be cheaper than that, and hopefully they'll be happy for me to change radiators to keep labour costs down a bit.

[Fintray]

It's funny, I've just realised that low & slow at it's logical conclusion is the matching of heat out from property with heat in from the HP. Reduce all the on/off's to one long run. Can't do it in freezing conditions but possible in higher temps maybe?

That was a new thought for me.

Good to hear that all working well and keeping the house at a comfortable temperature, once you have reached that comfortable level the heat pump is purely trying to maintain that by matching the heat loss from the house.
You will find that the heat pump will run continuously when there is a steady-ish outdoor temp that doesn't cause icing and that the heat pump can modulate to within its range.

I think my longest steady run was for 10hrs overnight at avg. -0.9C giving a COP of 4.23.

[Joeboy]

The wbs logbasket remains overflowing. I like the idea of cop as a monitor to efficiency but I'll be keeping an eye on Octopus power bought PA.

[Joeboy]

It's funny, I've just realised that low & slow at it's logical conclusion is the matching of heat out from property with heat in from the HP. Reduce all the on/off's to one long run. Can't do it in freezing conditions but possible in higher temps maybe?

That was a new thought for me.

Good to hear that all working well and keeping the house at a comfortable temperature, once you have reached that comfortable level the heat pump is purely trying to maintain that by matching the heat loss from the house.
You will find that the heat pump will run continuously when there is a steady-ish outdoor temp that doesn't cause icing and that the heat pump can modulate to within its range.

I think my longest steady run was for 10hrs overnight at avg. -0.9C giving a COP of 4.23.

Great advice Fintray, thank you. Still getting my head around heat in heat out, flow temps and response times.