The sensor automatically turns on the HVAC fan to measure the relative humidity inside the ducts and in all rooms of the house. The humidifier turns on as soon as the measured humidity drops below the set point. The humidifier is an equipment too often neglected but so important. In winter, heating dries out the air. The result is discomfort such as skin irritation, dry cough, static electricity and sometimes even nosebleeds, not to mention damage to furniture and woodwork. Adding an Aprilaire® 400 humidifier helps prevent all this.
See the manual and brochure for more information and feel free to contact a member of our team!
1 855 663-7417
Offer valid until June 12, 2026
Up to $1,800 in rebates
Lennox® prepaid Mastercard®
No payments for 6 months
On a new Lennox® system
Up to $1,400 in rebates
+ no payments for 6 months
* For full details and eligible products, please see the promotion details here
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