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Intertherm M3RL series 90+ Downflow

Posted: Mon Nov 26, 2018 4:16 pm
by CatherineGramze
Intertherm M3RL series 90+ Downflow Furnace.

I want to add a whole house humidifier to this furnace. It looks to me as if a return air bypass version, such as the Aprilaire model 600A, is my only option, but frankly I know nothing about this. I need knowledgeable advice. My biggest concern is if it is possible for a humidifier to be installed. See pic of the top of my furnace.

Ideally, this would work with my Ecobee 3 thermostat as the humidistat.
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Re: Intertherm M3RL series 90+ Downflow

Posted: Thu Feb 21, 2019 2:48 am
by Aiden4584
I think I know what will help you. I have encountered a similar problem. Look through the information here, all the details for each of the devices are listed.