Research Products 620a Bypass Humidifier 18 Gpd 5300 Sq Ft

Product Description

The RESEARCH PRODUCTS 620a is a whole-house bypass evaporative humidifier built for residential forced-air systems. It delivers up to 18 gallons of moisture per day and is rated to cover homes up to 5,300 square feet. The unit operates on 24 volts AC at 60 Hz and uses an automatic digital control that adjusts output based on outdoor temperature readings. A one-piece disposable HydroCore cartridge simplifies annual maintenance, and a built-in recirculation valve reduces wastewater output by 55 percent compared to previous-generation models. Licensed HVAC technicians and experienced installers handle this type of equipment as part of whole-house IAQ work.

The 620a is intended for installation on residential forced-air heating systems where a bypass humidifier configuration is appropriate. The plenum opening measures 14.5 inches wide by 18 inches high. The reversible design accommodates multiple installation orientations. An adjustable damper position, leak protection feature, and a distribution tray with tolerance for slight misalignments help reduce service callbacks. Coverage is rated for occupied spaces up to 5,300 square feet under typical heating-season conditions.

Key Features

• 18 GPD humidification capacity rated for spaces up to 5,300 square feet
• Automatic digital control adjusts humidity output based on outdoor temperature
• Manual mode available for customized humidity settings
• Recirculation valve reduces wastewater by 55 percent versus prior models
• One-piece disposable HydroCore cartridge constructed with recycled plastic for simplified annual service
• Reversible housing design supports multiple bypass installation configurations
• Leak protection and adjustable damper position included

Compatibility

Designed as an OEM-style whole-house bypass evaporative humidifier for installation on residential forced-air HVAC systems with a plenum opening of 14.5 inches wide by 18 inches high.

Installation Notes

Installation is performed by licensed HVAC technicians. Shut off power to the air handler and close the water supply before beginning any work. The unit requires a 24-volt AC low-voltage connection and a dedicated water supply line. Follow local mechanical codes and the manufacturer installation instructions for bypass duct sizing, damper adjustment, and drain line routing.

Technical Specifications

• Voltage Rating: 24 VAC at 60 Hz
• Capacity: 18 gallons per day (GPD)
• Coverage Area: Up to 5,300 square feet
• Plenum Opening: 14.5 inches wide x 18 inches high
• Control Type: Automatic Digital
• Wastewater Reduction: 55 percent vs. previous models
• Warranty: 5 years
• Assembled: USA (US and global components)

Standard Information

• Brand: RESEARCH PRODUCTS
• Manufacturer Part Number: 620a