Underfloor heating pipe and how to calculate how much you need

This is part two of our underfloor heating basics series
Today we talk about the different types of underfloor heating pipe and also how to calculate how much pipe you will need for a given area
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If you have any questions then please let me know in the comments section below

[@identitywithheld1027]

I would encourage you to continue creating content.

[@underfloorheatingreview]

Thank you, when I have the time that’s my plan

[@user-fs3pb8dn6e]

that's spot-on, thanks for video, very helpful

[@George-zd2gr]

Great video, really helpful! THANKS!

[@abstaher389]

Just seen this fair play to you buddy excellent video

[@reinisvanters8518]

very helpful, thanks.

[@AB-C2]

Great content

[@underfloorparts]

Really helpful video for the community Underfloor Heating Review!🤩

[@underfloorheatingreview]

Thank you UFP 👍

[@aerenewables]

love this video. can you tell me what the figures are for 250mm centres and 300mm please?? thank you

[@handle1196]

Brilliant content, do you offer a service to calculate and design snail pattern pipe layouts? I have my heat loss calculations for a self build low temperature system, radiators up and ufh ground floor, but I'm struggling to understand how i get the ufh to match a certain heat loss requirement. Example: a 22m2 room will need filled with pipe regardless, but how do select the pipe centres required for that heat loss and then fine tune it. 50mm spacing jumps make a lot of difference to kw heat output.

[@phill3144]

How come you only have 4 videos, this channel could be absolutely amazing if you kept the content coming

[@rayleggett3150]

How many videos do you have because i need to know every thing about design and spec

[@PAULOatham]

Great video(s). Where do you calculate the distance to manifold?

[@phill3144]

It's from the entry point of the pipe of the room to where ever the manifold is sifuated

[@TheLife0025]

Hi can we use two different pipe sizes with same manifold using an adapter. I'm thinking for using a 16mm pipe for my kitchen which has a larger area and 12mm pipe in hallway with wood floor which i will take out n install 60mm insulation between 100mm joists.

[@underfloorheatingreview]

Yes not a problem at all and is commonly done in many systems

[@WatchingTheo]

Do you sell UFH? Could you give some advice on your recommendations and brands please?

[@underfloorheatingreview]

sorry for the late reply, where are you located?

[@TheJoZeba]

Very useful! But how I choose between these distances 200, 150 & 100mm?

[@undefinednotfound]

i do 150mm

[@xxwookey]

You need to know the heat load for each room, although ultimately the most efficient design is always 100mm spacing because that keeps your DT down and that makes for a high COP. The most efficient design will always use more pipe, but this is generally a good investment.

[@MHKBuildingSolutions]

Hi mate, great video but your website doesn't work?

[@underfloorheatingreview]

Thank you 🙂, yes my website is longer active as I have been busy with other things of late

[@MHKBuildingSolutions]

@@underfloorheatingreview It will be good to have you back on here as your videos are very informative.

[@hardcooling]

Hello I recently recently found your channel but I see it’s been about two years since you uploaded a video

[@underfloorheatingreview]

Still here :-) and doing my best to answer questions, I work in the industry just been rather busy of late to make something for the channel, I do plan more soon

[@hardcooling]

@@underfloorheatingreview thank you for getting back to me so soon I also tried your website but it will not launch sorry for bothering you but I I am building my house practically alone with my own two hands so I found your channel very helpful when I decided i wanted to install ufh but I need some advice

[@underfloorheatingreview]

@@hardcooling yer have not renewed the domain yet, where you located?

[@hardcooling]

@@underfloorheatingreview Israel

[@underfloorheatingreview]

@@hardcooling take a look at www.omnie.co.uk it’s a good resource of the options available, any other questions let me know and I will try to help you out if I can

[@andypag1071]

Do those multiplication factors have to be increased by 20% if using a heat pump?

[@underfloorheatingreview]

Nope, no hard rules on this, it all comes to the output your trying to achieve in order to meet your heat losses, but if your talking about screeded systems then it never hurts to add more pipe regardless of the heat source

[@andypag1071]

@@underfloorheatingreview thanks. Will you be doing more videos?

[@underfloorheatingreview]

@@andypag1071 I would love too but I simply don’t have the time with young children and being active in the industry as my job. Maybe one day but I read all of the comments

[@handle1196]

If 200mm centres is floor area X 5, and 100mm is X 10, why is 150mm X by 6.6 and not 7.5?

[@AwestruckChemicals]

But surely the amount of pipe required will depend on the heat load of the particular room no?

[@underfloorheatingreview]

Yes and other factors such as flow temp and the floor finish will effect this, in most cases companies will over spec so that losses are met, for example some companies will install all pipe at 100mm ctrs regardless of the load, this allows them to future proof the design so if for example the customer wants to use a heat pump in the future then the system will still work at a lower flow temp

[@AwestruckChemicals]

@@underfloorheatingreview But if I only do this calculation for amount of pipe required, then isn't there a risk that after installation it turns out that I haven't put enough pipe in to meet the required heat load (no matter how much I increase flow temp)?

[@underfloorheatingreview]

@@AwestruckChemicals if your concerned and the property has high losses then I first recommend finding this requirement and calculating the W/m2 required - you can then compare this with the outputs of your chosen UFH suppliers system

[@AwestruckChemicals]

@@underfloorheatingreview thanks

[@tarassu]

DO NOT USE 12mm! Heat pumps are coming.

[@underfloorheatingreview]

Nothing wrong with using 12 or even 10mm pipe in UFH systems regardless of the heat source if the products are designed to suit. End of the day it’s all about flow rate, output and especially buildup. Many options out there so don’t let it put you off if you see smaller diameter pipes that allow you to add UFH to your home

[@trojanhawrs4613]

@@underfloorheatingreview How do you calculate the flow rate required for a loop?