GAQuail

I too am looking for a copy of a manual for model 21. Would love it if you could send me one as well

Thank you
Emily
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Hi, I saw that you have a copy of the manual for a Humidaire Model 21 that your willing to pass out. I recently acquired a Model 21 Zytron and was hoping you would be willing to share so so could get the temps set correctly. Thanks for the assistance!!

Larry
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Hey GAQuail,
I'm Tom from Wash state and I was given a Marsh Roll-X. I'm trying to find as much info as possible. I think it is one of the first models made. Should I replace the potentiometer with a digital Thermometer? e-mail chickenwhisperer@gmail .com