rewiring humidifier control

Nate Nagel · 2009-01-02T23:27:30+00:00

Hi all,I have an old Aprilaire powered humidifier connected to my furnace, which is an old Ruud 90+ gas unit. Currently the humidifier is enabled whenever the fan is running. I assume that there is a terminal on the board that goes hot when the fan runs, intended for this connection. Here's the issue - it's cold enough here and the insulation in my house is uneven enough, that currently I have the fan manually turned on low speed all the time to provide circulation. Otherwise my bedroom gets as cold as 62 degrees when the downstairs, where the thermostat is located, is 67 degrees. This allows the humidifier to operate when there is no heat call. What would be the best approach to change things around so that the humidifier operates only when the furnace is actually firing? I bet I could come up with something that works by looking at it myself, but I figured I'd throw this out there in case there were any "gotchas" that I might overlook.thanks,Nate

Jan 02, 2009 21 Replies

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Tony Hwang 17 years ago

Hmmm, When it is real cold outside you need less R.H. inside.

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Tony Hwang 17 years ago

Hi, EAC - Electronic air cleaner HUM - Humidoifier

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