I would like to modify my existing Honeywell “S” plan 2 zone (CH + HW) system to a 4 zone system. House is medium/large 4 bedroom detached and the total heating load 30kW.
The “zones” will be
1) Hot water
2) Ground Floor Heating
3) 1st Floor Heating
4) Bathroom Heating-Towel Warmer.
The modifications I need to do to the existing pipe work for the zoning are fortunately relatively simple.
Temperature control will be
1) Cylinder stat. and timer.
2) Programmable thermostat in the hall with TRV’s in rooms.
3) Programmable thermostat in “study” with TRV’s in bedrooms and landing.
4) At this time no idea. Which is my question.
The bathroom is heated by a single radiator/towel warmer affair.
I assume A TRV alone will have no boiler interlock so is out of the question.
Due to the nature of a bathroom (rapid temperature changes - baths/showers) I’m again assuming a room stat would not give satisfactory temperature control and also that domestic room stats are not designed for use in a damp environment so would either not work properly or fail prematurely.
Can anyone suggest a solution or should I give up the idea of an independent zone for the bathroom as wishful thinking and just include it in the 1st floor circuit.
Thanks in advance for any suggestions.
The “zones” will be
1) Hot water
2) Ground Floor Heating
3) 1st Floor Heating
4) Bathroom Heating-Towel Warmer.
The modifications I need to do to the existing pipe work for the zoning are fortunately relatively simple.
Temperature control will be
1) Cylinder stat. and timer.
2) Programmable thermostat in the hall with TRV’s in rooms.
3) Programmable thermostat in “study” with TRV’s in bedrooms and landing.
4) At this time no idea. Which is my question.
The bathroom is heated by a single radiator/towel warmer affair.
I assume A TRV alone will have no boiler interlock so is out of the question.
Due to the nature of a bathroom (rapid temperature changes - baths/showers) I’m again assuming a room stat would not give satisfactory temperature control and also that domestic room stats are not designed for use in a damp environment so would either not work properly or fail prematurely.
Can anyone suggest a solution or should I give up the idea of an independent zone for the bathroom as wishful thinking and just include it in the 1st floor circuit.
Thanks in advance for any suggestions.