Lennox Y0663 – AprilAire 700 Fan Powered Evaporative Humidifier delivers high-capacity whole-home humidity control for improved comfort, better indoor air quality, and enhanced HVAC system efficiency. Designed for homes up to 4,200 square feet, this unit uses a built-in fan to draw warm air from the furnace and efficiently distribute up to 18 gallons of moisture per day. The included digital humidifier control automatically monitors and adjusts humidity levels based on indoor and outdoor conditions.

This AprilAire 700 system operates on 120 VAC, integrates seamlessly with most forced-air heating systems, and is an ideal upgrade for homeowners seeking consistent humidity during dry winter months. With durable construction and trusted performance, it supports better respiratory comfort, protects wood furnishings, and reduces static electricity.

 

Key Features:

• High output of up to 18 gallons per day for large homes
• Built-in fan ensures consistent moisture delivery across the whole house
• Digital control adjusts humidity automatically based on conditions
• Compatible with most forced-air HVAC systems
• Operates on 120 VAC power
• Helps reduce dry air discomfort, static, and wood damage
• Reliable AprilAire performance packaged as Lennox part Y0663

 

Specifications: 

• Output Capacity: 18 gallons/day
• Power: 120 VAC
• Type: Fan-powered evaporative humidifier
• Application: Whole-home, up to 4,200 sq ft
• Control Type: Digital automatic humidifier control included
• Installation: Bypass-free design with integrated fan
• Water Panel: Compatible with AprilAire 35
• Wiring: Typically 24V control wiring with 120V fan power plug (varies by install)