Humidistat vs Dehumidistat
#1
07-19-09, 07:48 PM
Join Date: Jun 2009
Location: pennsylvania
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Humidistat vs Dehumidistat
I have seen references to a humidistat being used to control the air conditioner for maintaining a set relative humidity level in an unoccupied house. I thought that it was a Dehumidistat that performed this function. Can they be used interchangably??? If so, how would the wiring be different?
#2
07-19-09, 08:25 PM
It would be a de-humdistat. However, many devices are single pole, double throw so they can do both functions. For a de-humidistat the switch will close on a RISE in RH, while for a humidistat function, the switch will close on a FALL in RH. RH = Relative Humidity.
#4
07-20-09, 04:24 AM
In most cases that I have read about, when the thermostat does NOT control dehumidification, a HUMIDistat (opens on humidity rise) is used as an outboard control to slow a variable speed blower (increase dehumidification).
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