good work Glyn! Keep them vids coming. You are putting most professional plumbers to shame ;)

Three generations working together to give the fourth a fighting chance. Great work.

Fantastic video & a great result. You should become an installer, you're already doing a better job than most of them!

It is encouraging to see that existing single panel radiators can be replaced by double panel radiators to enable a lower flow temperature which in turn enables a heat pump to operate efficiently. Thanks for sharing. ☮️

Just goes to show it's not the technology that is at fault but the design and installation, excellent work 👍👌

This has been my experience with heat pumps . House always warm even on the coldest days . Great video 👍

Have say, just goes to show that with the right knowledge and tools heat pumps are nothing to bamboozled over. A thought through self install is probably going to give better long term returns than going with an installer who has little knowledge and is just box shifting to get grants. Good work, keep it up.

great video, your parents are fortunate to have you as their son. 👍

I have to say what a brilliant video and coming from a heating engineer, well done ! The more I research about heat pumps the more I want to change my own boiler for one and start fitting more 😊

We installed a 7kw version and solar in the summer seeing some real benefits not only in cost to run but a nice warm house too.

Very useful to see a real life installation in a 1980s bungalow. The Vaillant controls are impressively thorough. I like how the controls monitor the outside temperature and adjust the flow temperature.

Another great video. Interesting to see an install in another older property disproving the myth that they are only suitable for modern builds. We have a Daikin monobloc which performs extremely well in our detached 1960s built home, and saves us a fortune compared to a Rayburn.

Very good info. I've just started my own diary of my aroTHERM plus self install,.... and using your vid as a reference point!

Brilliant video! Your previous video inspired me to push on with my pursuit of getting a heat pump. I've now got a 7kW Arotherm Plus which was recently installed and enjoying trying to get it optimised over the last couple of weeks.

Your videos are so informative and clearly explained. I look forward to seeing your next challenge. Well done!

Lol at the little dish you put outside to catch the water! Great job and amazing to see that your parents are enjoying your hard work. Thanks for sharing the calculation site, i'm keen to give it a go and see whether my guesstimates are close. Looks like an amazing place to try a heat pump, you'll have to let us know in the update whether you find any wool in the fins ;).

Great work! I'm looking forward to when I can get one installed, too many other jobs ahead of it just at the moment!

We have the same Woodwman stove as your parents , 102 sq, meters bungalow built 1990. No under floor insulation but cavity walls are insulated , attic 300mm insulation and basic upvc double glazed windows and doors (13 years old), Stove heats house and hot water quite well using biomass/wood eco briquettes bought by the tonne pallet, cost so far about €1200/year here in ireland.But as with most energy products they have jumped up in price considerably. So I have been looking at air source heat pump systems and from your excellent videos I reckon it could work for us. But house has to be rated B1 before we can avail of grant. Thank you.

Very nice installation, the efficiency even -2 is really impressive

Thank you. An outstandingly clear explainer video, and charming too, M

Awesome update - thanks for sharing. I feel a self install coming along…

I have really enjoyed your videos and admire the standard of your work. I would love to do a self install myself. About 15 years ago I re-piped all my rads in 10mm plastic when I had a new boiler installed. It seems I would have to re-pipe it again in 15mm to get the full benefit of a heat pump. But I would have to rip up oak flooring and some tiled floors to do it. It seems a lot of upheaval. Thank you.

Your videos are fast changing my mind about replacing my old oil fueled boiler with a new one, or going for a heat pump. I'm just concerned about finding the right installer!

Great video Glyn, super explanation and step by step content. Install looks good, you're a great inspiration to others.

Love it Glyn

Very nice plumbing, it looks professional!

Your videos are a game changer. Nice work. ❤

Great work 👍

Impressive work Glyn.

Great video. Really educational and absolutely fascinating. Thanks!

Very informative and inspirational. I watched your videos on your house.Youve done a great job.

Brilliant, spread the word!

Really great video - thanks Glyn. We are hopefully install an AroTherm Split 5Kw system into a terraced stone-walled cottage - 2 up, 2 down. We have had long drawn out difficulties trying to get a heat pump which will meet the MC020 stand for noise, and were going for the AroTherm+. However, we can’t install it in the space we have, since it is near a drain and window and the use of R290 refrigerant is a blocking issue. So we are going for the AroTherm Split which uses R410A refrigerant - not so eco-friendly unfortunately. I’m think of getting the installer to include the Open Energy Monitor to give detailed and accurate data on performance. Thanks again!

Love your work Glyn keep it up.

You did this all yourself, self-taught?! You make it look so easy!

Great video again. Another one to prove they work in older properties. Have you ever thought about using full bore actuated 3 port ball valves as they have a lot less resistance than standard motorised valves. I changed mine to a ball valve and it increased the flow rate considerably. I guess you have enough flow anyway

Inspirational Glyn.

Brilliant video. Im just upgrading insulation in my 1930s house and need to look at heating options as boiler is 25yrs old. Issue is space for "plant room" This will be an issue in many normal semi detached I think 🤔

Love the content and the music is cool 😎 nice work 👍

I install these Vaillant units one of my customers last year managed to run their heat pump off their solar + batteries for 11 months without using the mains

Great video, super informative.

Great video. Thank you.

Excellent Video Glyn. We are planning to replace our gas boiler soon, hopefully whilst the HMG grants are still available. Also understand that there are some newer design heat pumps that will be more efficient in the next couple of years. We also have a bungalow, which we have just had an up to date energy assessment, which came out at grade 2 with ability to upgrade to grade 1. If possible might you let me know what energy assessment your parents house was please? Many thanks Malcolm

Wow, wish panel radiators were that reasonable price in the US!

This clearly highlights how these so called professional installers are crap when a self-installer can install a system that is far better than one installed by the so called experts. Thanks for uploading and putting the scamming professional installers to shame. .

Thanks for this, very useful. Did you run an airtightness regime before you did the pressure test? Would be interesting to hear how you reduced drafts and air movement keep up the good work 👍.

Yep it works in My world war II concrete lookout as well

@ 02:23 The average heat loss for the building is 43 W/m2. How do you get from there to a 4946W Heat Pump ?

I don't think you are allowed an isolation valve between unvented hot water cylinder and expansion vessel ? You have done a Great job putting in the new system 👍

Excellent job Glyn, I was particularly impressed with the Vaillant controls and the apparent low noise when the system was running. Did you calculate the difference between heating the dhw with your excess PV and off-peak electric over using the ASHP?

Can you tell us what the monthly electric bill total was in October, November & December 2023 and January, February and March 2024. No one with a heat pump is willing to do this. I wouldn't recommend sealing your house so it is airtight.

Nice one 👍👍

Glyn are there any regulatory issues to be aware of? As a competent DIYer with a lot of experience, I am seriously thinking of a DIY install. I have a friend who is a registered electrician but my house is already well up to standard electrically. I guess as there is no gas involved there is not a problem on the plumbing side. If I ever sell my house would I have produce any heat pump installation certification. Many thanks for the vids.

Great video Glynn? Did you remove the wood stove fully for the BUS grant or just disconnect from the heating and DHW? I love the 22mm elbow hack on the AFV

@Glyn Did Vaillant accept your warranty registration please ? My unit arrived last week, and I have started the install now

Great video, thanks Glyn. Where are the sensors for the monitoring (you might have mentioned them in the vid but I missed it)? How much do they add to the install cost, and the blower test? I’m so impressed with being able to put all this stuff in. I feel like it’s something I should learn but wouldn’t know where to start!

Great story- but why do you need to insulate internal pipework?

Glyn I see you have both on the heatpumpmonitor so I had a look on there but can't see what your room temp is. Is this not shown or is it me not seeing it . Just not sure if your walking around with a coat on. As you can show a good cop but it doesn't mean your house is warm.

Glynn fantastic video. Could I please which supplier did you use for the compression flow rate meters? And the heat pump isolation valve levers? Looking forward to more videos.

This is really interesting Glyn - nice work chum. No gas use at all then?

I’m in rainy coastal south wales , ie sea at bottom of garden some two hundred metres away . My concern is what the sea air will do to the pump components , I’ve read there is some mitigation for this but it seems it may be an issue , installer has specified two Mitsubishi ecodan 12kw units . To get the best circulation around these , watched heat geek tests on this , but I think they need to be located further away from house , do you know if there are significant issues in doing this , ie distance from plant room cause too big a loss ? Will be asking installer but want an independent view . Thanks for very informative videos , particularly useful the links to monitoring tools .

Hey Glyn 🙂 Awesome stuff! (Love your EV vids)…..can I ask did you receive the Boiler Upgrade grant for this. I’d love to do the same but wondering if it would be cost effective.

I find it "interesting" that Vaillant appears to be offering some components, like that solar powered outdoor temp sensor or the VR940f controller in the UK, but not here in Germany,. despite Vaillant being a german brand...🤔

Very informative video can you tell me what company you used for the air tightness test and how much was the cost? It seems to be a very important test for the air change on the heat punk software ive played about with it all ready and just adjusting the air changes can drastically change the heat loss!

@GlynHudson Many thanks for this most helpful video. Just curious why you didn’t stick with Vaillant for your cylinder (price?). I have a narrow cupboard and see that your cylinder manufacturer does do some suitable slimline units that would fit. What influenced your choice of a Tempest hot water storage cylinder and would you recommend them?

Fantastic job and great attention to detail too. Are there any particular settings on the Vaillant that were hard to figure out / any that could have been easily missed ? I'm planning a self-install during next summer, although I really feel I need some form of backup support in the years ahead, but I can't find any Vaillant installers yet in Ireland

Hi Glyn, what sort of cost would an install like that be? I looked into heat pumps back when RHI was running. The rewards were so much better under that initiative but trying to get an installer to respond was hard enough, let alone finding one that was competent. After many failed attempts, I finally got someone to quote an horrendous amount for an install which I was cost prohibitive at the time. I think there are more competent installers out there now but realistically, looking at what's involved in getting a heat pump system installed with pipe and radiator upgrades, I fear the affordability is just always going to be a sticking point.

Looks excellent. is it an open loop system or is there a circulation pump? I used a preplumbed cylinder from Daikin and it comes set-up with a buffer built into the tank and a circulation pump. This can be bypassed and just used as a volumiser if I like - which I think I may do. It's running about 100m2 of underfloor heating. Do need to speak to Daikin to figure out the pump settings for using it this way.

Hey Glyn thanks so much for your videos super helpful insights. I'm planning on doing a self install in France but struggling to find the outside design temperature for my area (74330) it can drop to -10 and occassionally -20 here in winter, do you know if setting my design to -3 is still sensible? thank you!

What’s the scop at the low end of the hundred systems list?

Are you installing pumps these days, commercially?

As an arotherm owner i would love to know a comparison of your monitoring scop to vaillants 'working figure' last year it claimed a scop of 5.2! I think its working well but not that well!

Hi glyn, ive found your videos very interesting on the heat pumps, ive been asked to design and install a system for someone, any chance of some pointers of the basics? Not sure how else to get on touch. Thanks carl

With the BUS grant and the 0% VAT on rads etc, would it have been cheaper to get a firm to come and fit it?

Besides the VRC720f with the wireless temp sensor, are any other controllers used?

Ignore that last comment I have just found the room temp. Clearly no Parka required

How do you get around the Permitted Development issue? (mainly at your house where it's mounted to the wall) As I understand this is the main issue in Wales where it is 1m. I'd love to upgrade but literally no areas of my property are more than 1mtr away from a boundary or within view of a neighbours window? (Ex council end terrace house end of terrace at the turn in a road so triangular plot)

How well was the house insulated? Looks great nice job.

Those cylinders are cheap for a reason? I never see any pipe lagging on any sites, unlike solar which is free energy and the pipe comes lagged. This world is a bit nuts.

Roughly what did the whole install cost if you dont mind me asking?

Were you able to benefit from the UK government grant for this excellent installation? I thought that you need to use an MCS accredited installer to qualify - perhaps you are, but you keep saying that you are not an installer...

how did you register your unvented cylinder to building control as i assume you do not have an unvented hot water qualification which is legally required

I had a Daikin fitted back in spring. Got to winter and the rads only get luke warm in the top 4" of the rads. Air has been bled and I've had the installers out so many times but still not fixed. I had it running at 18° on the madoka all day today and then raised to 21° when I got home. The because the rads do not get warm all over, the madoka shows 18° and no higher. I'd love to know what you think as I had everything removed and upgraded, rads, pipework, the lot. So upset that I've been swindled

Come fit mine sir! Froncysyllte 98sq m