Can I control U/F & Central with a Honeywell st9400c ?

31 Jul 2011
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West Midlands
United Kingdom
Hello there,
Looking for a little advice to help my limited knowledge.
The house I just bought has a combi boiler and radiator central heating.
There was damp in the kitchen floor so I've dug it out and poored a new insulated slab and would like to install UF heating here (kitchen) which is also where the combi is.
It will be an S-plan type system with 2 x zone valves.

My question is can I use a Honeywell st9400c 2 channel programmer to control the 2 heating zones, using the DHW of the programmer to control the UFH zone? OR Do I need to use the st9500c 2 zone programmer?

I have an existing room stat for the cental heating and was thinking of using the JG speedfit UHF programmable room stat JGPRTE for the temp/timing control of the UHF.

Does the st9400c - JGPRTE combination sound compatable for this?

Many thanks for any advice

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You can use any time you want, but most ufh systems come complet with pump, mixer, roomstat and timer. Any control set is fine as long as it can work with the zone valve.

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