Just a quick post to say the underfloor heating manifold has been installed and the pipes are now under pressure ready for the floor screed to go down on Thursday!!
It feels like we are moving forward a bit quicker now. The reasons the pipes are put under pressure is to make sure that in the very unlikely scenario the pipes are nicked when the floor is being screed, the pressure will drop and water will shoot out!
For those of you who really want to know…we have a 28mm flow and return from the boiler to supply the hotwater and we went for an 8 port manifold. (Just to make sure we had a port spare in case we needed to use one for additional loops or anything. However, we managed to keep all the coil runs to under 100m each (the maximum permitted) and use 6 loops.
I could probably bore for England on UFH now…sad aren’t I! I just hope it works??!! We are both more than a little paranoid that it won’t really work in terms of supplying enough heat etc. We have not lived in a house with UF before.
The real test will be waiting the recommended 6 weeks required for the screed to cure before we can turn it on.
Tags: Farmhouse Renovation, UFH, Underfloor Heating
Categories: Farmhouse Renovation, Home Improvements, Posts with Photos
The amount of heat emitted from a 1m² area depend on the following factors;
1, Floor Finish – The resistance of your floor finish insulates the UFH system. So basically a 10mm tile will perform far better than say 25mm wood boards.
2, Flow temperature – The temperature of the water circulating through the pipe affects the performance of the system. Looking at your post it looks like you are using a boiler with a flow temperature of around 40-45°c .
3, Pipe density – The density of the underfloor heating pipe plays a large role in heat emitted per square meter. For example 100mm pipe centres will perform far better than 250mm.
And as for pressurising the underfloor heating pipework your correct. There have been occasions where the UFH pipe has been nicked and trades try and hide any damage they have done. That’s until a 2 meter high jet of water alerts everyone nearby to the damaged section.
It can be very expensive to find and repair the damage after the screed has gone down.
I recall one project where a clumsy joiner nicked the pipe 6 time’s and at £100 per repair the owner was less than happy.
Good luck with the install guys.
Hi, may I ask you where can I find schematics for exactly the same manifold (assembly, flow directions and such). Many thx.
Hi Andrius, I am afraid we don’t have these. but are manifold was supplied by Wundafloor, and their website is here: http://www.wundafloor.co.uk/