hi all , i will try not to ramble on .... so im about to attempt to install a underfloor heating system in my kitchen ... i plan to do this by taking a flow and return from my existing condensing boiler (that is situated also in the kitchen) . im looking at purchasing a single room system that includes thermostatic blending valve and pump. from the information i have obtained i understand that the best way to control my heating system is to do away with my original central heating timer and purchase a programable room thermostat (jgprte) and control my original heating system and underfloor heating with this unit. what im not sure about is do i need to fit a zone valve (s) ? and if so where abouts and how are they controlled , the existing boiler already has a by pass valve fitted so that seems to be taken care of . as im sure you can imagine im new to the world of underfloor heating so any help/advice to explain and would be much appreciated
underfloor heating
- Thread starter jamie1972
- Start date
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There are a lot of complications with what you want to do and generally I would not advise it unless an experienced professional has been involved in the design.
Do you realise you need to time the UFH differently to the rads?
Tony
Do you realise you need to time the UFH differently to the rads?
Tony
As tony has said it needs to be set up individually. I'd set it up like an s plan, have two seperates prog room stats. One for UFH one for rads
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Tony by stats I'm referring to a cm907 for example. S plan would be so he can separate the two circuits.
He doesnt need to weather comp the UFH at all. It will work perfectly fine blended down from a manifold. Plenty of systems working this way.
He doesnt need to weather comp the UFH at all. It will work perfectly fine blended down from a manifold. Plenty of systems working this way.
It will work after a fashion!
There are many systems working like that. Almost all of them.
But a simple on/off thermostat will heat up at the same rate regardless of the outside temperature and will overshoot on warm days and take a long time on cold days.
A predictive system with WC will adjust the flow temperature to heat the floor slab to just the temperature actually required on a warmer day.
Not ideal at all really.
Tony
There are many systems working like that. Almost all of them.
But a simple on/off thermostat will heat up at the same rate regardless of the outside temperature and will overshoot on warm days and take a long time on cold days.
A predictive system with WC will adjust the flow temperature to heat the floor slab to just the temperature actually required on a warmer day.
Not ideal at all really.
Tony
Tony you have pretty much said in your 1st post that it isn't worth doing unless he has weather comp. We both know that is aload of crap. What would you prefer a UFH circuit on a constant temp circuit or a rad? !!! UFH everytime for me.
Even if UFH is on a WC circuit and weather change dramatically, it would still over shoot/undershoot as floor temp still takes time to cool down/heatup.
I am a big fan of WC by the way and would always recommend it but it's not essential.
Descent setback programmer and all will be fine mate.
Even if UFH is on a WC circuit and weather change dramatically, it would still over shoot/undershoot as floor temp still takes time to cool down/heatup.
I am a big fan of WC by the way and would always recommend it but it's not essential.
Descent setback programmer and all will be fine mate.
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