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Boston Lincs based homeowner seeks advice on HP install

AdamK · 2025-02-23T01:11:42Z

ok 1967 4 bed house about 124m2 recent EPC of B, very proud of that as was E when we bought, and a heat loss (depending on the surveyor) of 5.58kw-6.8kw. currently renovating and have thought maybe foolishly of getting a heat pump rather than move the unvented tank and boiler. i started off the octy route and have a deposit sat with them on an online quote of £3800 (which is including the 20% they had on and a referal £100). they did a survey while were renovating then left me hanging for a month only to say they want to come back when ive finished. Not impressed. so looked at Heat Geek and got an initial online quote of £6500 based on the EPC of C that we had. then tried a few weeks later and it popped out £7500 then few weeks later £6000 and now £7000. whats going on? went back to Octys site to see if the new EPC altered the quote and that now says £6000. have the installers gone a bit nuts? why the price hikes? above prices are on top of the BUS grant so at these levels i cant see why anyone would switch. in preparation for a heat pump i have set aside a new downstairs cupboard 900x1300 approx. made sure it has an outside wall, replaced 2 rad feeds that were in 10mm plastic with 15mm copper, run 2 28mm runs that cover about half the rads and will T into the old part of the houses 22mm runs that spur off to rads in 15mm. loads of room outside with no noise issues. so why the high quotes? ive had 4 companies round and so far Octy are the cheapest and closest to what i would consider a fare price for the install, if i keep with the quote i put the deposit on, and will change 5 rads. but i get the impression they can be hard work to deal with and only want new builds or houses where they dont have to think too hard. plus i didnt feel they would design to 45c as id asked. an indy was next at about £4.2k but id have to do the rad changes and again not super sure id get a good performing system. then a HG but accessed directly. got £5.5 to £6.5 depending on heat pump chosen plus 8 rad changes. this company worried me as they initially wanted to design to 50c like Octy, but they did change to 45c on request. now waiting for another HG to do a rough quote after site visit. would you go with Octopus, the indy, or though HG to get the 3.5% scop guarantee? also maybe a question for a separate post but which is the best heat pump? Vaillant, Daikin, Panasonic, Riello, Samsung, Mitsubishi or another?

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(@transparent)

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25/02/2025 3:03 pm

I'm pretty certain that the £4.5k being quoted was on the basis of this being treated as a New Connection.

That's very different to the approach used for LCT Applications.

Overall, I recommend not having discussions about costs in a 'live' conversation.
You need that information in writing, so there's no question over what it refers to.

Save energy... recycle electrons!

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Transparent

(@transparent)

Illustrious Member Moderator

Joined: 5 years ago

Posts: 3346

25/02/2025 3:10 pm

Posted by: @adamk

↑

the HP im being quoted is between 6-8kw anyway which wont need 3ph.

We can't say that yet!

We don't know the loading of your particular phase from the local substation.
Very few of the 230,000 ground-mounted substations are monitored.

I have access to a few of those which are,
and losses due to phase imbalance is a serious issue.

NGED's present RIIO-ED2 Agreement with Ofgem requires them to reduce those 'technical losses'.

Failure to do so will result in more outages due thermal stress caused by current in the Neutral (grey line in above graph).

Save energy... recycle electrons!

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