Radiantly heated floor with vav terminal units
Radiantly heated floor with vav terminal units
(OP)
I have not used this forum before and hope this is an appropriate subject.
I am searching for suggestions for control strategies.
Setting: Child's reading room in a to-be-built public library. The room will have hydronic radiant floor heat and a dedicated vav terminal unit for heating, cooling and outside air ventilation. The floor is concrete structure. The total concrete slab thickness under the room is 6 1/4". There will be 2 1/4" of concrete, 2" of rigid board insulation, the PEX tubing and 2" of concrete on top. The radiant system has a dedicated pump. The building will have a DDC control system.
Problem: How to integrate control of the radiant floor and vav systems without providing heating and cooling simultaneously and/or having the systems fight each other. I am considering maintaining the slab at a varying temperature dependent on outside ambient dry bulb and allowing the pump to come on only below a predetermined outside temperature. The vav would provide primary heating and cooling.
I hope I've provided enough information for responses. If anyone has successfully put a similar system together I would like to hear about it.
Thanks, Tim
I am searching for suggestions for control strategies.
Setting: Child's reading room in a to-be-built public library. The room will have hydronic radiant floor heat and a dedicated vav terminal unit for heating, cooling and outside air ventilation. The floor is concrete structure. The total concrete slab thickness under the room is 6 1/4". There will be 2 1/4" of concrete, 2" of rigid board insulation, the PEX tubing and 2" of concrete on top. The radiant system has a dedicated pump. The building will have a DDC control system.
Problem: How to integrate control of the radiant floor and vav systems without providing heating and cooling simultaneously and/or having the systems fight each other. I am considering maintaining the slab at a varying temperature dependent on outside ambient dry bulb and allowing the pump to come on only below a predetermined outside temperature. The vav would provide primary heating and cooling.
I hope I've provided enough information for responses. If anyone has successfully put a similar system together I would like to hear about it.
Thanks, Tim





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