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Ducted dehumidifier with controls from one furnace and ducts to another???

Ducted dehumidifier with controls from one furnace and ducts to another???

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Old 07-02-19, 09:13 PM
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Ducted dehumidifier with controls from one furnace and ducts to another???

2 story house + finished basement. each floor has it's own furnace (all in a control room in the basement, all are Carrier Infinity 98s circa 2006), upper two floor units have an AC (no AC for the basement).

We have a ducted dehumidifier (Therma-Stor SanteFe 4021400) that seems (to me) to be hooked up strangely.

The ducts run to the basement furnace - one just below the blower (intake side) one just above (outgoing side). But the only control wires (2wire control) are connected to the UPPER floor furnace. There is nothing except the ducts connected to that basement furnace and nothing but the two wires connected to the upstairs furnace. There are no other wires (other than a power cord) on the therma-store.

I walked in the control room this evening and found the up-stairs AC running, the dehumidifier running, and the basement system doing nothing (which seems fine..it's perfectly nice down here and a bit hot and muggy upstairs). But unless the basement furnace was blowing wouldn't the dehumidifier just be re-cycling it's own air?

Does this make ANY sense?

 
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Old 07-02-19, 09:43 PM
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Having the upstairs thermostat for the upstairs furnace controlling the dehumidifier installed on the downstairs furnace makes little sense. I'd expect that the downstairs furnace fan would need to be running..... even on slow speed...... to be effective.
 
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