AprilAire Model 600M 17 gal. for up to 5,000 sq. ft. Whole-House Large Bypass Evaporative Humidifier with Manual Control

Item # 312148347 | AprilAire Part # 600M | UPC Code 686720604003 | UNSPSC Code 40101903 | Catalog Page #676
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Product Overview

AprilAire helps make your home a Healthy Air environment with the Model 600M 17 gal. Bypass Humidifier. This whole-house humidifier is designed for homes up to 5,000 sq. ft., delivering optimal relative humidity to balance out the dry, hot air created by furnaces. The included manual humidistat lets you control the humidity level throughout your home. While balanced humidity exists between 40-60%, it's important to remember that outdoor temperature and other home factors will impact what relative humidity level is attainable and recommended for your house. You'll enjoy balanced humidity thanks to the evaporative process, which works by passing hot, dry air from your furnace over the interior water panel to add moisture before returning the humidified air into your home using the existing blower fan in your HVAC system. The water panel is essential to the process, ensuring the removal of impurities from the water and providing uniform, high evaporation for whole-house humidification. AprilAire invented the whole-house evaporative humidifier in 1954, and this unit is designed and assembled in the USA utilizing US and global components. It offers multiple options for installation, making it simple to experience the benefits of balanced humidity throughout your living space.

  • The water panel removes impurities before adding moisture to the air - use genuine AprilAire Water Panel 35 for annual replacement
  • Adds up to 17 gal. of moisture per day to create balanced humidity
  • Helps preserve wood floors, cabinetry, furnishings, and other items susceptible to dry air
  • Helps minimize the formation of bacteria, viruses, fungi, and dust mites that thrive in low humidity
  • Helps reduce the incidence of respiratory infections and symptoms related to allergies and asthma
  • Delivers precise control, sufficient humidification capacity, trouble-free performance, and minimal maintenance
  • Uses the existing blower fan in your HVAC system to deliver balanced humidity levels
  • Included manual humidistat monitors your home's air and provides precise control
  • Onboard sensor actively measures RH throughout your home and turns on the humidifier when needed
  • Detailed installation instructions included in manual
  • Works for homes with ducted heating systems
  • Designed and assembled in the USA utilizing US and global components
  • Included in the box: 600M Humidifier, Manual Control, 24V Transformer, Saddle Valve, Water Panel 35, Installation Instructions
  • 5-year warranty



Certifications and Listings
UL Certified
Control Type
General Color Family
Humidification Method
Humidifier Features
Adjustable Humidistat, Automatic Moisture Control, Automatic Shut Off, Filter Included
Humidifier Tank Capacity (Gallons)
HVAC Product Type
Manufacturer Warranty
5 years from Installation
Maximum coverage area (sq. ft.)
Pack Size
Product Depth (in.)
Product Height (in.)
Product Weight (lb.)
Product Width (in.)


5 years from Installation