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My ASHP Installation: Mitsubishi Ecodan 14kW

Kev M · 2021-03-19T18:06:36Z

Our ASHP is being installed 5th April I thought it might be of interest to others to hear how it progresses. It's all become real because we have the confirmed installation date and the ASHP is being delivered direct to my house on Monday 22nd. Some details. We live in a 1990 165 m2 4 bed bungalow. Insulation is quite good and we are also getting new windows and doors in the next few months. Heating now is 8 storage heaters, one wood burner, one SF stove, 2 electric towel rails, one electric UFH system in an ensuite and a couple of portable electric heaters for occasional use. HW is E7 immersion and electric showers. As you would expect, electricity bills are high. We haven't lived here a whole year yet but I reckon £1800 a year and it's only that low because there are only two of us (and of course we've had no visitors!). We will use less wood and coal too as the stoves change from necessities to nice to haves. We are using a company called JL Phillips, based in Newark. They are doing the whole installation including the ASHP, cylinder and 12 radiators split into 2 zones. They have done an initial quote (with the price) and a full survey. I'll get the results of that, including the heat loss calculations and radiator specs, next week. We are having a Mitsubishi Ecodan 14kW ASHP and a 250L Heatrea Sadia Mega flow cylinder. Our requirement was calculated at 11kW so we could have gone for a smaller ASHP but they recommended the bigger one. In preparation I've been removing storage heaters (most of the rads are going in the same locations) and I've just laid a concrete slab outside for the ASHP. We have plenty space and our nearest neighbours are 30-40m away. It's going outside the kitchen and well away from bedrooms and living room. Although we live in a conservation area, our ASHP falls within permitted development so no planning permission is needed. The RHI was a big incentive for us. It will cover about 70% of the cost and I hope savings will cover most of the rest. I doubt we would be getting an ASHP without it so it has done its intended job. That's about all for now. I'll update this thread as things progress. Next event should be the ASHP arrival on Monday. Which reminds me, I need to clear a space in the garage!

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Morgan

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25/03/2021 6:21 pm

@kev-m

All the very best Kev. Hope all goes to plan. Loving the updates on a ‘live and ongoing’ install as I prepare to dive in to the world of ASHP CH. keep the updates coming.

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

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Kev M

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Topic starter 28/03/2021 8:10 pm

All set for 8:30 tomorrow. The cylinder arrived on Friday and all storage heaters are removed and furniture/stuff moved out the way.

I've agreed a plan with the suppliers that shows where all the rads/pipework is going and a schedule that details the work they will do. They do seem fairly flexible about what goes where.

They've said 2 days so it's going to be hectic!

One of the things I'm considering is this

https://www.ofgem.gov.uk/publications-and-updates/essential-guide-metering-and-monitoring-service-packages-mmsp

I've asked the suppliers and it costs about £1100 but OFGEM give you £805 up front and then £115 per year for 7 years. Sounds like a good ROI so I've asked for a quote. OFGEM have a limited budget for this so I'll have to check there is any left.

I'll update with progress tomorrow.

Kev

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Kev M

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Topic starter 29/03/2021 6:26 pm

End of day1. Four guys arrived on time and got straight to it, two on radiators/pipework and two on the ASHP. At close of play we have the ASHP in place, piped and wired in:

the cylinder in situ complete with some shiny new pipework. I think there is more in the attic directly above but I haven't looked yet:

and all the radiators in place with about half piped in and half to do. This is one of the big ones at 2000x400 (a good excuse to get rid of the horrible curtains):

The ASHP is about 7-8m to the right of that window. It's the side of the house but not visible from the front. The neighbour's house is behind the hedge but about 30-40m away.

The guys were very pleasant, efficient, flexible, etc., took away all the day's rubbish and cleaned up. They suggested the best way to route the pipes to make them least visible; some dropping through ceilings and some through internal walls. It looks very neat so far.

Hopefully we'll have a working system tomorrow.

This post was modified 5 years ago by Kev M

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Morgan

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29/03/2021 6:44 pm

@kev-m

Excellent news Kev. Keep the updates coming.

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

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Morgan

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31/03/2021 7:34 am

@kev-m

No update! Please tell us that all is well 🤞

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

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Kev M

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Topic starter 31/03/2021 8:54 am

End of Day 2/Start of Day 3

It's all done! They finished about 5:30pm. It all looks good, very neat and tidy. This is the completed cylinder. The HW expansion tank is built in. The main controller is on the front of the cylinder and we also have a wireless controller for each of out two zones.

And this is the loft, immediately above the cylinder. The red tank is the expansion for the CH. There is a lot of new pipework.

And this is what it looks like under the cover. Scary!

And to complete the picture, the ASHP.

I was given a run through of the controls. It all looks straightforward and I'll probably leave it on the defaults for a while to let things settle in. It was nice to wake up to a pleasantly warm house; our kitchen, main bathroom and hall had almost no heating before so that's a pleasant change. The hot water is also much better because it's an unvented cylinder.

We were very impressed with the installers. They were professional, efficient and tidy and took away every scrap of waste. They spent more time hoovering than I ever do! They were also also flexible and happy to change radiator positions and pipe runs. All we had to do was supply coffee and cold drinks.

The ASHP iitself is very quiet. It's outside the kitchen and I can just hear it if I listen hard until the freezer kicks in and drowns it out. We can't hear it at all from the bedroom. We do have to get used to the normal CH pump/radiator noise after living with storage heaters.

The system's not getting much of a test at the moment because of the weather but that will come. I'd probably rather have the current benign weather than a cold snap to get used to things.

Next step is to let things settle in and then get the RHI application done. I also want to have a look at electricity usage. So far so good though.

Kev

This post was modified 5 years ago by Kev M

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Morgan

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31/03/2021 8:59 am

@kev-m

Good morning Kev. Extremely pleased to hear that all seems good. We’re probably going to use the same company as you.

When you say the HW is better due to unvented cylinder do you mean the HW pressure has improved? I ask because the HW pressure here is appalling at the moment.

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

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Kev M

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Topic starter 31/03/2021 9:03 am

@morgan, yes, HW is at mains pressure now, same as cold. It's much better than it was.

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Morgan

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31/03/2021 9:09 am

@kev-m

Excellent news and pleased for you. Still can’t do anything here till June earliest and require cavity wall insulation first. Strangely I’ve only managed to get one company to attend. Bizarre as I thought people would be fighting for the work but that seems not to be the case. Either they fail to respond to initial enquiry or fail to follow up with an appointment. Frustrating.

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

👍

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Kev M

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Topic starter 01/04/2021 3:40 pm

I had to stay away for a couple of days (all Covid-legal as I'm my dad's carer). Mrs M texted me this morning and said we'd had quite a bad leak but not to worry as she'd sorted it.

When I called, worried, she strung me along for a bit before she casually asked me today's date..... !! My sense of humour just about held out.

All is still well really.

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