marshian

Absolutely what I found - need a higher temp to recover than what is needed to maintain the house at the desired temp

Wowzers that's a lot of progress made.............. Excellent

I get that hence the 😉

to be honest at one stage I considered it 😉 however I’m a bit long in the tooth for a career change and I’m 5 years away from retirement 🙂 but I wouldn’t mind setting myself up for a post retirement “heating optimiser” I don’t want to get involved in installs but I bet there are a lot of systems out there being run way more inefficiently than they are capable of being run…. Might make a nice beer money sideline

Or get familiar with what you need to ask the installer to set up - I would have loved a heat geek accredited installer last year but not one locally that would do a viessmann boiler the way I wanted it done - so I used the only Viessmann installer in 50 mile radius and told him exactly how I wanted the system set up X-plan DHWP and I initially got an S plan!!! (eventually we got there and I think he learnt a few things on the way)

Old boiler was 10kW min effectively 45 deg C was the min practical flow temp and christ that boiler cycled a lot in anything other than mid winter. I upsized only some of the rads initially - big mistake - do all or none unless you want rooms to cold (original rads) and rooms to hot (upsized)

Well bar a little bit of trimming work it’s done Louvres shut Louvres open suns gone and it’s cloudy so light isn’t the best for photos need to re-instate gutters and fascia and sort out the drainage but quite happy how it turned out - It was never going to be a quick job and limboing round a post parked smack in the middle of the garage side door would have been awful

I was advised with my house set up I was ASHP ready but I really wasn’t confident enough to dive in the deep end without knowing I could run low and slow at ASHP flow temps - so I went for another gas boiler (one that could modulate down to a low level 3.2 kWh and down sized from 24kW to 16kW as another stepping stone towards ASHP) Very confident now that in 10 15 years or so I can switch over when the boiler reaches the end of it’s life)

having journeyed from scheduled high flow temp 65 + heating (barely any condensing savings except in warm up phase) to scheduled heating flow temp 45 to 55 max where the boiler was always condensing (although not to max eff) and then finally to low temp heating 23.5/7 ditching all schedules with a weather compensated flow temp between 25 to 35 max there is no way I would go back to scheduled heating. The cost difference is insignificant compared to the huge benefit in comfort factors. House never overheats, everything in it is a nice temp (it’s the little things like I don’t miss coming into a house where air temp is fine in all rooms and sitting on a cold leather sofa) It really was a total game changer.

I have trickle vents in a few SUDG windows added post 1995 which was when the original SUDG widows were fitted - I bloody hate them for two reasons 1. Useless from a noise suppression perspective (I live near a busy road the main bedroom when the house was extended was fitted with a TV as the window had to be replaced) 2. I already have a ventilation strategy (I have a PIV in the hall and extract fans in both bathrooms and kitchen) all the windows with TV's are closed anyway and I have no condensation issues at any time in the year If I was to replace the all the windows again a PIV is not enough under the current regs to avoid TV's - MVHR is but I don't want or need to fit that because the PIV does what I need. There is a clause which enables you to replace windows without TV's and that is provided only a certain percentage of window are replaced (less than 30% from memory) So I'd do all the windows in 3 bite sized chunks each time stipulating with the supplier that under the current legislation/regs I do not want TV's to be fitted to the windows on each occasion Any supplier refusing to do this wouldn't get the work and I'm pretty damn sure very few window suppliers would want to turn down the work as a result of my work around.

That doesn't even reach MOT std.............................. (and that's normally bloody terrible!!!!)

Very good point - my current cyl would be almost useless with an ASHP - the coil is tiny and incapable of transferring energy quickly In summer I heat HW with a 62 Deg flow temp and it takes anywhere between 35 to 45 mins to get the cyl back to 50 Deg C (I do this to maximise the condensing benefits where the boiler doesn't have a whole house to maintain temp (because summer) In winter I heat HW with a 80 Deg Flow temp and it's done in 20 mins because I want the boiler to get back to CH asap (low temp heating needs to be continuous to replace the heat lost. (at 80 deg flow temp it's condensing for maybe just a few mins out of the 20 mins cycle) An ASHP compatible tank with a 3m2 coil would solve the issue but it's ~£1500 plus install costs. It's one of the reasons I am investigating a PHE if I can improve the HW reheat whilst running lower boiler flow temps I can extract a little more efficiency out of the boiler even in winter. If that works I only need a direct UVC with no coil and that's a heck of a saving even with the cost of a PHE

Yes and Yes - very house and heat loss specific - I effectively went for same size T22 to replace T11 - only one rad needed to go from T11 to T22 and then T33 (cos it got extended) I didn’t design the system to run at 25 to 35 deg flow temps it just happens to be the range that heating 23.5/7 with WC works (30 mins for HW daily) I have 3 column rads in the house and whilst they are also an equivilent % upgrade 2 of them are single column and they really could do with being double column rather than single because they only just cope - I think the claims for heat output are based on T50 and when run at lower temps they aren’t as effective

Sorry it wasn’t a criticism of your comment - I think you made a valid point that it’s easy to make solving a problem complicated Urban Plumbers videos are often good for “out of the box” approaches to heating/hot water solutions to specific customer needs that aren’t complicated which is why I’ve watched every single one he has done - I remembered this one so linked to it.

It all fitted in a tiny bathroom on DHWP - I thought it was very simple (whilst being bloody clever)

He want 4 simultaneous showers - so he will need a bigger tank heated to a higher temp so he doesn’t run out of water during showering - urban plumbers did an install where the gas boiler was set up on HW priority and a small tank was mated to a gas boiler and it could reheat HW as fast as it was being used - like a huge storage combi but without the peak flow limitations of a combi (the biggest of which can’t supply 4 simultaneous showers) Thats the way I would go in this situation

What temp are you currently heating it to? Most HW uses are blended 60 deg water with 20 deg water at a 50/50 mix gives shower temp water If you can use 140L in 10 mins that's 280 Litres of shower temp water and 28 Litres per min (assuming multiple simultaneous showers) For clarification 2 people living in one house - 115 Litre tank heated to 50 Deg once a day and that's 2 showers each per day or one long hot bath so I'm think your water usage is quite high

So size the rads to work on the same low flow temp as the UFH based on the heat loss of the upstairs rooms (allow a bigger oversize for bathrooms because ventilation losses tend to be larger - extract fans / opening windows etc)

Thank you - I hope you have a little more clearance in your alcove than I had 🙂 you really do need a bit more than 70mm for wiggle room!!!

This has taken a while…… Support brackets fabricated in 5mm stainless steel then welded up Fitted them and was very pleased with the overall look Mrs Alien not so happy….. so I sent them off to be powder coated in white to match now fitted And the other side you won’t actually see much of them the first one will be almost covered by the garage fascia board and gutter the second one by a water removal pipe stopping it draining onto the decking better finish the rest of it now

I'm doing whole house (inc bedrooms) with radiators without TRV intervention - Yes I have TRV's right now but They are set to a stupid upper limit so actually have no functionality - I could just as easily replace them with decorators caps - Weather compensation combined with individual radiator flow rate control works perfectly

Works for me 🙂

Don't even bother to try Stick a low branch end into a pot - it will root itself - once rooted cut the umbilical cord so to speak and you have a new fig tree to pass on to someone else - done about 10 so far!!!

Put it in the ground and put the root ball in a stainless steel washing machine drum Add a 100 mm soil pipe to the bottom of the WMC drum poking out the top so you can provide the required water (up to 2 gal a day is needed)

1st Thursday was last week Can't do this week - I'm at Prescott Hill Climb orgainsing a car show