Quote:
Originally Posted by joe1234  When it comes to dehumidification, do I need a thermostat that has a humidity control? |
You can if you want. I have it and been pleased with it. The stat I would suggest is the Honeywell IAQ (TH9431), or if the budget don't allow you to do the IAQ, then a basic humidistat can work.
Quote:
| So is this "automatic" on furnaces with the "DEHUM" option, or does the thermostat tells the furnace when do dehumidifiy? |
There's two way that it can be done.
-Furnace controls the blower ramping speed. (There are a few ways it can be set up by the dipswitch settings)
Say, it was set up the way I perfer. When there is a call for cooling, the blower comes on at 50% speed of full cooling speed for about 30 secs to get the coil cooled. Then the blower ramps up to 80% speed for about 7 min, then ramps up to full speed after 7 min, and it don't care of the humidity is high or not untill the t-stat no longer calls for cooling.
-Use of a T-stat like the IAQ. If the humidity is higher than set point (I have mine at 45%) the blower will stay at the 80% speed untill the humidity is removed. With this, you can get better comfort with this. I used to be a person who ran our A/C at 72˚, now with this, I run it 76˚, and I am comfortable!