Under Floor Heating designing, spacing and balancing | Toolbox Talks 

Look up.. absolute legend of heating

100%

Ok thanks

Is there not a tradeoff in pumping losses? 100mm centres means quite a lot more pipe (50% more than 150mm and twice as much as 200mm) so more power needed to shift the water through it. Or do you just keep the pipe length to some limit and add more loops? So there is a bit more pipe in the runs back to the manifold, but mostly it's just an investment in manifolds?

As the Building Regulations at the time of construction were most definitely split zones on most New Builds, even small flats.! It sounds like an oversight by the Builder, Plumber or Electrician. I’d contact the House Builder & inform them that your home doesn’t comply with the Building Regulations. Unless, of course you’re a Self-Build, then it’s you that’s the twat! Regards Dick Puller👍👍

Standard lol. building regs are to change to a 55c flow temp max from now on.

@@TheDickPuller it's 3 floors 2 zones. Unfortunately no zone for the obviously colder ground floor. Builder doesn't care whatsoever.

There are special underfloor heating base plates for that. They look a bit like lego base plates. They come with a 50 mm spacing so jou have some flexibility in spacing and bends. They are available without and with insulation, raising your floor height. If you have a concrete ground floor with proper insuliation, just get a professional to do all of it when your floor needs replacing. Special machines can cut out the snail patterns and they level it all, which you will need for PVC floors anyway. That way you do not lose any height and all of the outside doors will still open. Upstairs just shortening the doors if needed is much easier. These machines are heavy and bulky anyway, so a base plate system makes more sense.

No. 100mm centers everywhere and use balancing to rectify. NOT controls .. they are the fall back. This video is not for laymen or enthusiasts really and could lead to issues.. laymen should listen to designers I don't want responsibility

@@HeatGeek where do I find a designer in Essex!?

@@waterandlightbyalandeeney4304 have you looked on find a heat geek map?

@@HeatGeek I had a look, the guy you and nath recommended has had Covid and couldn’t see any others near me?

From over 30 years experience in UFH, you’ll generally find that due to limited available Floor Area in Bathrooms & Shower Rooms etc. You need to Close Band the UFH Loops in these areas. With Heat Loss, Air Changes & High ambient temperatures required for these areas, 100mm centres would be farting at thunder in these areas & no more so than with a Low Temperature Heat Pump system. Regards Dick Puller

16mm

Take a look at our mass flow rate video.. this will explain all.

@@HeatGeek I’ll take a look, I just installed an omnie TorFloor system in my place and their flow rate stuff confused the hell out of me without all the extra lingo 😂

It’s energy based, dt doesn’t matter. Even if the dt was wide if energy out is below energy in it will cycle. Infact widening the dt will increase flow temp and cause overshoot so cycle

Sorry that's completely incorrect, the output of all emitters are based on the dt between their MEAN water temp to air temp (mw-at). The greater the MW-AT the greater the heat flux /power output.

When your 40 degree radiator doesn't transfer any heat, it's probably because you room is steaming hot already.

A very common misconception. See Adams mass flow video for a better understanding

I think this is what the student in the video is trying to ask. Heat output is a function of dT (as well as SHC and flow rate) according to your mass flow video, so when you suggest increasing the dT they (and I) initially correlated that to an increased heat output. However, to achieve that higher delta T the flow rate will be much lower and so the actual output in kW will be lower. Have I understood it correctly? This wasn't really explained brilliantly in this video, though I'm sure the point was made in the class.

@@HeatGeek sorry a floor heating system output is based upon BS EN 1264 and can be easily calculated using the difference between the surface and air temperature. It is different to radiators whereby a kH value is calculated dependent upon the overall floor construction kH * (MWT-Air)^1.1. With radiators it is easy to apply EN 442 with a simple MWT-Air due to the very low material resistence between the water and the air. However, floor heating system build ups vary so much, such as a foiled and grooved insulation panel with a timber covering versus a dry pug screed system beneath a chipboard and carpet. I would recommend you studying BS EN 1264 as it will give you a good grounding 👍 good luck.

delta temperature (if your temperature is 40 and DT is 15 then the comeback temperautre is 25

Correct. See our 120 hour indepth training on our site for that

@@HeatGeek Hi, Thank you for your reply, I will sign up for the training course as I am building a Passivhaus design house in Cornwall, as a self build, and will require council sign off from a MCS accredited company that will install the heat pump. Some time ago, I have put down a deposit to have a regional installer, GreenGen to supply a Vaillant monoblock unit. Their heat loss calculations they supplied is way off, and insisting to fit a 8kw unit. My calculations suggest a 5kw unit as my total thermal envelope loss is less than 100w per degree change. I am old school, have an Engineering degree and have worked on nuclear subs in Devonport dockyard, so I am not an idiot, but these companies do treat you as such. Shame that you are so far away, I would have you guys install the heat pump and tank system for me. Anyway, your work and knowledge is top notch, rare qualities nowadays indeed. Regards Adam

Fortunately we calculate heat loss so it isn't guess work and if the ufh is inadequate we will know beforehand and add additional primary heating. That includes air changes obviously. It's not old fashioned guesswork anymore, it's literally maths and physics.

Sometimes you need additional heating for sure. We're not really going in to all the variables here. merry Xmas!! Xxx

@@patrickwheeler2646 What, do you think Heat Loss calculation is new son??!!! Listen, there’s nothing new in Heating Design. We learned Heat Loss calculation in college 40-50 years ago & did it long hand!! The stuff Skater Boy, the Heat Freak, is pumping out is mainly plagiarism. Granted, he presents it well, but there’s nothing new in his Mantra.

@@HeatGeek Mate, if you’re trying to educate the course cowboys, career change chancers & hard of thinking; you need to be more specific about things like supplementary emitters in Bathroom etc. No point going off on a cocaine fuelled rant like you do!! Calm down dear & think about the video content first. I’m always here with friendly advice if you need me. Season greetings Dick Puller👍👍

@@TheDickPuller perhaps you can show us how its done? x

1 guy lol