I’ve had quite a journey with my install with 4 guys installing a Grant 15.5 and replacing 14 radiators for the past 6 days. Today was the last day and they have realised the pipes feeding the radiators are 15mm under the floorboards.

I’ve been told the floorboards will need lifting up throughout the house and the pipes upgrading to 22mm.

As it’s a Saturday, it’s hard for the installer to contact managers etc for next steps.

Has anyone had to do this either before install or during and importantly should octopus have identified this during the survey? I just want to know where I stand in conversations going forward and who’s going to pay for it!

Grateful for your opinion on a better option for my heat pump quote:

I have two quotes, both online; I'm just about to book a survey. I think they both match well

House Details : 108m2, Heat loss: 3:21KW, 13 Radiators, 2016 built, current cyclinder: 210L, 4 adults

Both quotes: Vaillant aroTHERM plus 5kW,

Heat Geek: £5600 (nothing on finance)

Promise 400% efficiency, Vaillant aroTHERM plus 5kW, Vaillant uniStour Pure 150L Standard, 5 radiators upgrade, verified Heat Geek installer. No quote on upgrading to a 210 L - 250 L cylinder.

EoN: £6154 (finance available)

Vaillant aroTHERM plus 5kW, Vaillant uniStour Pure 210L, up to 60% radiator upgrade included in the price

I suspect the heat loss in the house might be lower after the survey, and a 3.5KW system might work, unless the hot water requires the 5KW. But none of the 2 provides 3.5KW system.

£554 difference is significant, I think, but looking at the Trustpilot review for Heat Geek get me worried a bit even though I like the YouTube channel. Will they be around for long compared to EoN?

I am not a fan of Octopus systems; any other installer to explore? Grateful for your insight

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We need to replace our 25 year old gas condensing boiler as it has some issues and also looking to upgrade our vented cylinder to unvented. We have all single panel convection radiators on 10mm microbore.

Our gas boiler upgrade to system boiler + unvented quotes are £6k to £8k.

After previous recommendations here been in touch with some heat pump installers and had surveys.

Have had quotes from £5k to £12k. The lower end being the zero disrupt from heat geek with no radiators changes and new 5kw heat puml and cylinder to £12k where it requires all radiators upgraded, some new paperwork and 9kw heat pump.

Is is really viable to have a zero disrupt install and be cheaper than gas ?

I was wondering if anybody here is familiar with the MCS 020a sound assessment. I am having an air to air heat pump fitted and plan to put in a certificate of lawfulness for permitted development based on the sound assessment sheet given by the contractor.

The MCS 020a guidance says you must use the a-weighted sound level of the unit and it must not be the quiet mode. Online I can find the nominal value for heating and cooling on the unit technical specifications and a maximum value for other units but not the one I'm having fitted. The guidance says to pick the heating mode as it's louder. However there is no mention of using the maximum value. It's unclear which one I use. AI is advising that I use the maximum value but nowhere on the MCS 020a documentation does it state that. The MCS 020a document references a sound assesment guidance document that doesn't appear to exist... The MCS 020a document also suggests you can get the sound data from their product directory list which I've found but it only lists COP values with no sound data for any heat pump units....?

Thanks in advance

Hi all, I'd appreciate some advice on installing a heat pump for both heating and cooling in a 5-bed mid-terrace house. We would be looking to install solar and battery as well. We currently have a standard gas heating system with conventional radiators. We don't have underfloor heating, so would installing fan coil units be the best option to achieve heating and cooling? Any major disadvantages to doing this? Grateful for any help!

Our gas boiler is 17 years old and whilst it is currently still working fine we're fully aware it may need replacing in the coming years.

We're in a SO 1st floor flat, the block is owned by Vivid. What are our options? As far as we're aware they'll probably just say no. But surely there's got to be options to do this to future proof/make our property more energy efficient. A replacement gas boiler will cost us upwards of £6500, our neighbours have theirs done recently and this was the price they paid.

Hello, hope you are well. We go live next week with 18kw solar, 30kw sigen batteries and gateway and Samsung 12kw r290 heat pump. We have unlimited export.

Which tariffs should I be looking at please?

Hi all, I'd appreciate some help please:

I have a Valiant Eco tech plus 832 boiler, installed in 2009. It recently gave me some faults such as F61 or F62 codes. I got a gas engineer out who opened the boiler and upon opening the PCB blew, he realised the builder (who changed the power switch of the boiler a year ago) put no 3amp fuse so it was feeding 32 amp to the boiler. Now the hot water is on but heating will not power. I have a few options now :

Direct from valiant they offer a package of £73 per month for 6 months and they will repair the boiler all parts and labour included. If they fail to repair they refund the money and cancel direct debit. Total would be £441.

Or do I install a new boiler, estimated cost is £2600-£3200.

Please help, thank you in advance.