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Old 01-01-2011, 02:52 PM   #1
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Interconnecting Humidifier to Furnace


I'm trying to interconnect my honeywell humidifier to my Lennox furnace so the humidifier turns on when the fan kicks in. Is there a NO contact on the lennox furnace I can connect to?
Is the HUM terminal a NO contact or is it powered?

Thanks for any help/expertise you have to offer...

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ShawnShawn is offline   Reply With Quote
Old 01-02-2011, 08:45 AM   #2
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Interconnecting Humidifier to Furnace


Down into below post is a wiring diagram for a Goodman unit but it may help.
Experts on this site sometimes recommend a sensor relay. Diagram #2 is with a transformer. Diagram #5 is without transformer.

Aprilaire 700A on Goodman Furnace?

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Old 01-02-2011, 08:56 AM   #3
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Interconnecting Humidifier to Furnace


Quote:
Originally Posted by ShawnShawn
I'm trying to interconnect my honeywell humidifier to my Lennox furnace so the humidifier turns on when the fan kicks in. Is there a NO contact on the lennox furnace I can connect to?
Is the HUM terminal a NO contact or is it powered?

Thanks for any help/expertise you have to offer...
You can use a Current sensing relay or a sail switch, you can also purchase a t stat that has a hum connection. Honeywell prestige or IAQ. Both are great stats.
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