Aprilaire Bypass Humidifier With Manual Control

AprilAire 600M – Manual Bypass Whole-House Humidifier

The AprilAire 600M is a manually controlled bypass humidifier designed for integration with forced-air HVAC systems. Using the furnace blower to distribute humidified air, this unit delivers whole-house moisture control, helping to maintain consistent indoor humidity levels during dry seasons. Its bypass configuration allows for flexible left or right side duct installation based on system layout.

Product Highlights

• Manual Humidistat: Provides on-site adjustment of humidity output according to indoor comfort requirements.
• High-Capacity Performance: Capable of delivering up to 17 gallons of moisture per day under optimal operating conditions.
• Water Panel® Evaporator: Standard #35 panel distributes water across the pad to efficiently humidify air passing through the system.
• Bypass Damper Design: Built-in damper with position indicator allows seasonal airflow adjustment as needed.
• Durable Cabinet: Corrosion-resistant housing built for long-term integration into residential systems.

Specifications

• Model Number: 600M
• Control Type: Manual humidistat
• Water Feed Rate: 3.0 gallons per hour
• Evaporation Rate: 0.7 gallons per hour
• Voltage: 24 VAC
• Frequency: 60 Hz
• Dimensions: 15-3/4 in H x 15-3/8 in W x 10-1/4 in D
• Plenum Opening: 12-3/4 in H x 10 in W

Installation Requirements

The 600M is intended for installation on the supply or return duct of a forced-air system. It requires a continuous water supply, low-voltage wiring, and drain access. Professional installation is recommended to ensure correct setup, duct compatibility, and adherence to local code requirements. The unit includes hardware and templates for typical installs.

Contractor-Focused Application

Designed for residential use in homes up to 4,000 square feet (based on insulation and structure), the AprilAire 600M is a practical solution for HVAC professionals seeking reliable, high-output humidification. It provides consistent moisture control while minimizing maintenance demands.