Reducing Energy Consumption in a Large Home: A Step-by-Step Guide

You have no hydraulic seperation for a system with ufh and radiators on low temperature controls. This will cause underflow in the ufh circuits when in operation. The llh needs to be refitted and a separate pump used for the radiator circuit from the distribution header. This is standard Vailant and Viessmann design.
Hydraulic seperation has rules for when and when not it is required.
This design you have done is subject of many of my design videos and causes regular winter call outs for me.
It's very easy to rectify the issue. Ask Vilizar at Vailant to do a system schematic for you.
This is as much of a hydronic no no as ccts at the ufh manifold.

Quick question, is there a follow up video to this?

Does llh mean the boiler uses more gas as it doesn’t modulate as well? I have a llh on my 637 (set to 20kw) and it uses a lot of gas. I have 3 zones with no ufh and thinking of removing the llh to see how this can make a difference.

Owners should downsize?

Great video

almost a year

One month left for revealing year to year gas consumption.

Are you using heat loss software, if so which one?

Awesome work thanks for your efforts ❤

Lmao.. how the hell do you get your head around all that

Very interesting job.

Now that's a real nice home

Ridiculous complexity IMO.

The overall complexity of this system and the various parts raises a question in my mind. Hotels don’t create these inter related and inter dependent systems. They work much more on a room by room basis for all variable services. Why wouldn’t something similar work better and cost less here as well, because large parts of that house aren’t used every day. Individual room or area type systems can be activated when in use and only public areas on permanently. Also the thermal envelope of this property can’t be very efficient either based on your energy consumption stats.

I would like to work with you and Gain some more experience 😊

How can I get in touch please Simon ? I am one owner of 10 new houses with air source heat pumps and ufh and am not happy that the systems have been commissioned properly to take account of different floor coverings . Kw energy use is high on cold days but the system seems to struggle to keep rooms to temperature

Does this video and his amazing work fill me with confidence that there are good tradesmen out there - who are honest and demand the best for client; or does this video worry the hell out of me that i will only find a poor or below par tradesman, who will rip me off and leave me with a crappy short lived system...?

At the cylinder dual stat, instead of taking the control stat to overheat stat link out and just keeping the overheat stat, could you have just set the old control higher to say 70C so the NTC sensor control would then be in control? Thinking that would give an additional failsafe?

Legend. What city do you work in?

They hired you for a reason. Tons of houses out there like this. Keep up the good work

3 people in the house, definitely only need one cylinder and one boiler for sure

Brilliant ! Mesmerising watching a true professional at work..

What happens when there’s a conflict of desired flow temp from any of the 3 weather curves? Assuming the controller chooses the highest flow setpoint and then uses the sensors of the other zones as high limit stats controlling the zone valves?

Finally a heating plumber who puts into his job more thought than I put into my hobbies.

cool; makes me appreciate simple American plumbing systems.

It seems you have to be as much an electrician, plumber and boiler engineer - all at the same time. This is a huge, complex job that could completely fry your brain. Hat's off to you.

Wonder how long this would to take to pay for itself in savings,. Most HVAC plumbers, probably not. Also not DIY, that's for sure.

Well done. These are great to watch.

I wish you were closer to Shropshire. I'd happily have you review and upgrade my system. If you have any recommendations for like minded installers, please share. Keep up the great work...

I'm always fascinated by your videos and despite what is being said by some, your knowledge way surpasses any plumber I have ever met! I'm particularly interested to note that a 24 kw boiler can provide all the heat on a 4000 square foot property given that my 1800 ish property with 11 trv'd rads and 1 hw tank struggles on a 18kw boiler even when 4 rads are isolated and the respective room doors are closed. The only suggestion I have had from a plumber is to increase the boiler to 24 kw. BTW, double glazed and copious roof insulation.

Love these videos, such a clever guy.

I am about to have a 25 year old heater replaced that feeds 200m2 of under floor heating. I noticed on one of your videos that you had a pump connected to the underfloor heating manifold. I have floor heating dead zones that never get warm. Is this type of manifold something I should be requesting my heating engineer to install?

Probably a commercial engineer installed it always as a minimum install 2 as 1 a back up have 1 as master 1 as slave love ya vids mate

Can you clone yourself?? We have a huge shortage of decent trades people like you!

I like that you tried without knowing it would work. Glad it did, smart work.

You are doing an excellent explanation with the limited time and complex installation that you have. You did not tell us if the boilers were set up to fire properly to maintain the needed space and hot water temp. You stated that energy consumption was high with not enough heating but you did not share your findings as to what caused the situation of the high energy bill. Good luck.

I've not done any research on prices for things, but it seems likely that you could have purchased a probe camera to look into the cylinders through the pipes instead of cutting one open and saved both of them. Then you could have sold the second cylinder (through installation at a second site) to recoup the cost of the camera and be left with a tool you could continue to use for years.

Great video thanks and salient in late 2022 in Europe. Also good seeing you discussing theory and practice in the comments.

50000 kWh a YEAR ..!!!! Lol ? Not hard to make it efficient, insulate this stupidly designed house. Those houses just got to be removed... they are not worth it and for 3 people living in it .. each human got to have a max amount of energy that he can use in a year ...
To live in those old houses they ned to live the old way ... with pullover and heavy trousers... !
The guy did a pretty decent job but in the end .. this house and people living in it do not deserve this wasted energy.
I live in a very small house i builded myself out of straw and wood, i'm using less then 1000kWh a YEAR .. all included.

Why would you remove one water cylinder instead of just cutting it from the system and leaving as a spare? In case another one gets damaged they would have another one that they paid for already.

Such a vast home. Such a waste of gas. And no big solar array, wind turbine, ice sourced heat pump, ground heat pump, pellet cv? Or most importantly insulation, etc... Peculiar to me

Pathetic. Unlimited energy is free off the grid. So why would anybody pay? Why would I limit myself? I have no bills for electricity and i don't need to heat up my home. If winter or summer it keeps the inner temperature around 22 to 24 grades Celsius. It was build 250 years ago by one of my ancestors.

at 3/4 through the video, you look really tired.... that is a massive job

Decent looking boilers those. They look similar to the range topping Ideal Vogue or System boilers inside and out. Not cheap!

Holy shit this system makes me angrier with every minute of the video!

Everytime im showering I'm thinking about a way to use the heatenergy of the wastewater running down the drain.
Is there any practical way to recycle the heat of the wastewater to preheat the freshwater?

Heat a room is always expensive, thus heat the person/feet up with a pad. Latest and greatest: xiaomi bear pad graphene heating element. 170w

Damn dude, just... Damn!

The easiest way to save money on your heating bills is to start mining crypto :L