NATIONAL EXCELSIOR CO.

(630) 773-5500

1520 ARDMORE AVE
ITHASCA, IL 60143

excelsiorhvac.com

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GeneralAire® Preferred Wholesalers

VIDEO: How to Install a 4400A Whole-Home Humidification System 7:36

Thanks to ACHR the NEWS, Clockwork Comfort Control's Trent Davis, and homeowners Brandon and Marie LeMaster for including the new GeneralAire...

Posted: 05/16/2023

VIDEO: Quick Non-Ducted Install of a DH75 or DH100 Using the GeneralAire Wi-Fi APP 2:27

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Posted: 04/26/2023

GeneralAire 570M Humidifier Installation

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Posted: 10/23/2017

GeneralAire 900 Humidifier Installation

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Posted: 10/23/2017

GeneralAire 1000 Humidifier Installation

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Posted: 02/25/2018

GeneralAire MHX3C Manual Humidistat Installation

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Posted: 02/25/2018

GeneralAire GFX3 Automatic Digital Humidistat Installation

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Posted: 02/25/2018

Latest Blog Posts

Video: GeneralAire Cartridge Air Filters Features and Benefits

Posted: 02/16/2024

Why We’re Still Breathing Dirty Indoor Air - New York Times

Posted: 01/03/2024

Healthy Air, Healthy Minds

Posted: 12/20/2023

Elevating Indoor Air Quality - A Shared Responsibility for HVAC and Plumbing Contractors (APR Supply Co. Editorial: Vol 7)

Posted: 11/03/2023

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