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Honeywell HE250A1005

24v TrueEASE 17 Gallon Per Day, Advanced Bypass Humidifier with H8908 Manual Control

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Unlike portable humidifiers that are only effective in the rooms they’re in, Honeywell TrueEASE humidifiers are installed out of sight with your central heating and cooling system, helping you automatically maintain a comfortable humidity level in every area of your home. Of course, not all whole-house humidifiers are created equal. TrueEASE is loaded with homeowner-friendly features that set it apart.

TrueEASE automatically fills itself, and the replacement pads can be easily accessed from the front or either side. The slide-out pad design means you won’t have to disassemble the humidifier or interact with the plumbing in order to change the pad. The Change Pad indicator light on the front lets you know exactly when replacement is needed. Plus, Honeywell replacement pads feature an exclusive AgION™ anti-microbial coating that helps inhibit the growth of mold and bacteria.

When your HVAC system is running, typical whole-house humidifiers constantly cycle water and air through, sending three to four gallons of water down the drain for every one gallon delivered as humidity.

The HE250A1005 features Honeywell's advanced control system, which says goodbye waste and hello efficiency by automatically monitoring the dryness in your home, and then only running water and air through the system when humidity is needed — cutting water waste up to 30% and saving energy by eliminating the constant cycling of air. That’s just the beginning. Because humidified air feels warmer, you’ll be able to cut energy costs by turning your thermostat down in winter while still feeling comfortable.  The advanced control system also features LED diagnostics to indicate system performance issues, and when it is time to change the evaporator pad.


The two main types of standard humidifiers are the bypass and power fan.

Bypass humidifiers can be installed on either the supply or return plenum and you run a bypass duct to the plenum the unit isn't installed on.

Power-Fan humidifiers can be installed on a vertical run of either the supply or return plenum and uses a fan to distribute humidity into the air stream.

Maximum Coverage Area

Maximum coverage area means this humidifier will perform well for home sizes up to the square footage indicated, provided that the home is “tight." A "tight" home is typically one that is sealed well around windows and doors and does not leak air to/from the outdoors.

Maximum Coverage Area
2500 Square Feet
Water Capacity (GPD)

The amount of water vapor that can be delivered into the home, measured in gallons per day (GPD), that the humidifier can deliver into the space.

Water Capacity (GPD)
17 Gallons/Day
Electrical Requirements

Power-Fan Humidifiers require 110 AC plug-in power to run the fan, as well as a 24v switch from the furnace board. Bypass Humidifiers only require the 24v switch from the furnace.

Electrical Requirements
24 Volts
Remote Sensing Bulb

A remote sensing bulb is a small (about ¼” round) sensor that mounts outside the home and connects by light gauge wire (18 to 22 gauge, 2-conductor) to the humidifier controller. This sensor provides temperature readings to the computerized controller which allows the humidifier to automatically adjust humidity levels in the home based on outside air temperature.

Remote Sensing Bulb
Not Available For This Model
Bypass Duct Diameter
6 inches
Plenum Opening Size
9 3/4 x 12 5/8 inches
Limited Warranty
5 Years
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