Honeywell he205a1000/u Bypass Whole-home Humidifier

Product Description

The HONEYWELL he205a1000/u is a bypass-style whole-home humidifier designed to integrate directly with a forced-air HVAC system. It maintains consistent indoor relative humidity levels automatically by drawing conditioned air through a water panel evaporator and distributing moisture throughout the duct system. With a rated output of 17 gallons per day (GPD), this unit is sized for residential applications where dry air causes discomfort, elevated heating costs, or damage to wood flooring and millwork. Licensed HVAC technicians typically handle installation as part of a furnace or air handler service call.

This humidifier is suited for residential whole-home installations on gas, oil, or electric forced-air systems. The bypass design routes air through the humidifier using the existing pressure differential between the supply and return ducts, eliminating the need for a dedicated blower motor. It is typically installed on the supply or return plenum, connected to the cold water supply, and wired to a low-voltage humidistat or thermostat control. It is appropriate for homes experiencing dry indoor air conditions during heating season.

Key Features

• Bypass evaporative design uses existing HVAC airflow without a separate blower motor
• 17 GPD moisture output for consistent whole-home humidity coverage
• Automatic operation integrates with compatible low-voltage humidistats
• Helps protect hardwood floors, woodwork, and wood furniture from dry-air damage
• Supports energy efficiency by allowing thermostat setback at higher perceived comfort levels

Compatibility

Designed as an OEM-style whole-home bypass humidifier for installation on residential forced-air heating and cooling systems with existing supply and return duct plenums.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with the manufacturer instructions and applicable local mechanical codes. Shut off power to the furnace or air handler and close the water supply before beginning any work. The unit requires a saddle valve or tee connection to a potable cold water line and a drain connection for bleed-off water. Low-voltage humidistat wiring should comply with NEC requirements for class 2 circuits.