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Replacing Worcester oil boiler with an ASHP

JulianC · 2021-03-30T18:15:26Z

I am replacing my 25/32 Worcester oil boiler with an ASHP Had discussions with many suppliers, a lot of whom wouldn't quote because we have 10mm pipe drops to each radiator, from 28mm loft pipes. Anyway: 201m2 bungalow. Built 2001. EPC rating of B after triple glazing, 300mm of loft insulation. We currently use between 1220-1500L of oil per annum. 100A incoming circuit. ASHP approved by DNO (Western Power). 20,500kWh of heating energy required. 3000kWh of hot water demand from the EPC. An energy loss calc and room by room heat demand has been undertaken. This has lead me to select Ecobubl from Winchester to undertake the work. They have proposed a Daikin Altherma 3H HT 18kW ASHP. Also a Mixergy 150L H/W tank - but we are also considering a standard cylinder with a large internal coil, to maximise the ASHP. And a 3kW immersion to use my 4kW of PV and Solic 200 electric diverter. Simple control system, using my current Nest. Had wondered about the Homely Energy control system, but I wonder if this adds complexity. Price is £13,700 for ASHP + Mixergy + buffer tank + installation and support for RHI. I should get back about £10k through RHI. I will take photos before, during and after installation which should be 12 April

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JulianC

(@julianc)

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Topic starter 08/05/2021 9:16 am

Competing (?) with Mars as a YouTube star. This vid has been created by my installers, Ecobubl. Please like and promote

You have to stay to near the end, to see the future BAFTA winner 😂

Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and new Hyundai Ioniq 5 N electric vehicles with Myenergi Zappi mk1 charger

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Kev M

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08/05/2021 10:17 am

Your installer was a lot better looking than ours!!

Good performance though; I was expecting a cameo but that's definitely a best supporting actor contender 😀

👍

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Phil3822

(@phil3822)

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09/05/2021 8:41 am

Really good video from Ecobubl. I am interested in the notion of a high temperature heat pump they refer to, I assume that just means lower COP and more expensive to run though.

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JulianC

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Topic starter 09/05/2021 8:54 am

Morning. The SCOP is targeted at 2.9, assuming the MCS design calculation and an exit temp of 65. I will reduce this temp over time, seeing how my home performs. The MCS design temperature was above what we used to run it on oil. So I’m hoping for a SCOP of 3.3.
Again the design electric usage was about 7500kWh annually, which I hope to beat.

Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and new Hyundai Ioniq 5 N electric vehicles with Myenergi Zappi mk1 charger

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Phil3822

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09/05/2021 9:01 am

@julianc

Thanks, so this is your own installation on the video? Looks very nice indeed. Is this high temperate model any differently made or just a regular ASHP with an increased temperature? The COP quoted looks nice too. I would love to learn more about your installation as it looks like it could meet my needs too.

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Mars

(@editor)

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09/05/2021 9:04 am

Love that @julianc - you're a natural and that 2022 BAFTA is in arm's reach now.

Pre-order: The Ultimate Guide to Heat Pumps

Subscribe and follow our Homeowners’ Q&A heat pump podcast

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JulianC

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Topic starter 09/05/2021 9:23 am

@phil3822 how else can I help / provide more information? More than happy to answer any questions or do a video call sometime to discuss further.
@editor Mars - I think you and Mrs M are far more professional 👍. But they don’t call me “one take Julian” for nothing

Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and new Hyundai Ioniq 5 N electric vehicles with Myenergi Zappi mk1 charger

👍

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Mars

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09/05/2021 9:23 am

@kev-m, I agree. I thought Julian was going to have a "I love my ASHP" type line the way he presented it, but it's a full-blown supporting role. Very nice.

Pre-order: The Ultimate Guide to Heat Pumps

Subscribe and follow our Homeowners’ Q&A heat pump podcast

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Mars

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09/05/2021 9:24 am

@julianc 🤣 Amazing - told you you were a natural. We certainly aren't one-takers. 🤣

Pre-order: The Ultimate Guide to Heat Pumps

Subscribe and follow our Homeowners’ Q&A heat pump podcast

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Phil3822

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09/05/2021 3:06 pm

@julianc

Yes that would be great, your system looks good so anyway I can learn more would be good. Essentially like you my wife would be most unhappy at many radiators being changed. I would love to do messages somehow first until after my first quote which is on the 18th then maybe a video call. I feel the high temperature versions will be even more lesser known and Ecobubl do not cover south Lincolnshire. Anyway sorry to spam this chat.

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JulianC

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Topic starter 09/05/2021 3:08 pm

@phil3822 my email is juliandc@yahoo.com

Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and new Hyundai Ioniq 5 N electric vehicles with Myenergi Zappi mk1 charger

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JulianC

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Topic starter 14/05/2021 10:00 pm

Getting a COP of 4.37 currently. As it’s nice weather 😊

Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and new Hyundai Ioniq 5 N electric vehicles with Myenergi Zappi mk1 charger

👍

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