Looking for a thermostat/humidistat recommendation.
Commercial space in a high rise office building that has a separate HVAC
system from the rest of the building. Air handler with cooling coil in the
space and the condensor is up on the roof. There are electric heating
elements after the cooling coil but rarely used as this is 100% interior
space. Present 'stat is a simple mercury bulb unit. 24V controls.
I'd like to replace this with a digital unit. That's simple enough and
lots to choose from. However, I have some humidity issues...sometimes it
gets kind of clammy in the conditioned space. Knowing that the heating
elements are *after*
the cooling coils I decided to try an experiment. I
added a switch by which I can keep cooling on while flipping the 'stat back
over to heat mode. The cooling system dehumidifies and the heating element
becomes a reheater, cycling as needed to keep the temp up. It works very
well in testing but I'd like to automate it so the cooling is not on
Is there a thermostat/humidistat available that will control this sort of
reheat situation? Like either humidity or temp can cause the compressor to
kick in and if temp is satisfied then go into reheat mode? And if temp
continues to drop then shut off the cooling until it comes back up?
Looking around online I see only units designed for heat pumps with hot gas
reheat or units that allow humidity to call for cooling but no reheat and
dehumidification ends if temp drops a couple degrees below setpoint. Is
reheat control available for small systems or is that just something found
on large building systems?