Honeywell HE300A1005 - TrueEASE Fan Powered Humidifier 18 GPD with Automatic HumidiPRO Humidistat

The Honeywell HE300A1005 TrueEASE Fan Powered Evaporative Humidifier with automatic, digital control covers up to 3,000 square feet and disperses up to 18 gallons per day.

The Honeywell HE300a1005 TrueEASE Advanced Fan-Powered Evaporative Humidifier is a great whole-home humidification solution that covers up to 3,000 square feet, and disperses up to 18 gallons of humidity per day into your home. The HE300a1005 TrueEASE humidifier will not only provide a solution to your dry air woes, but it is also an eco-friendly option that will conserve energy and water while doing so!


The advanced fan powered TrueEASE system will only run water and air through the system when humidity is needed, using up to 50% less water, and saving energy by eliminating the constant cycling of air.  


This fan-powered unit mounts directly to the duct of your heating and cooling system, allowing the humidity to be placed directly into the airflow and distributed evenly throughout the home. The HE300a1005 can be mounted on the supply or return duct (plenum) and is easily reversible for right or left hand installation. Additionally, this model will hook up to a water line so you do not need to worry about filling it multiple times a day.  


TrueEASE has a patented design with multiple snap-into-place configuration options, making installation a breeze. No longer will pipes, small compact spaces, water heaters or any other obstacles will get in the way of installation!  


The Honeywell TrueEASE whole-house fan powered evaporative humidifier features the automatic HumidiPRO humidistat control to ensure comfortable humidity levels throughout the home. The HumidiPRO humidistat should be installed directly onto your heating and cooling system , preferably the return duct, if possible. 


Maintenance: The only maintenance that needs to be done on the Honeywell HE300a1005 humidifier is the seasonal change of the Honeywell HC26E1004 Humidifier Pad. The humidifier pad can be easily accessed from the front or either side of the unit, and features a slide-out pad design, which means you won't have to disassemble the unit in order to change the pad.

Additionally, the TrueEASE HE300a1005 humidifier has user-friendly maintenance lights near the bottom of the unit. These lights will notify the homeowner when service is needed, when the humidifier pad needs to be changed, and when the system is operating normally to take all the guess work off of the homeowners shoulders. 

*Important note: If you have any questions regarding this product, please use the HVAC.com Contractor Directory to connect with a trusted contractor in your area.

  • Brand: Honeywell
  • Genuine OEM Product: Yes
  • Control Type: Automaitc
  • Coverage: Up to 3,000 sq. ft.
  • Humidifier Pad: HC26E1004
  • Diameter: 6"
  • Electrical: 24V - 60Hz
  • Product Size: 15.5" W x 16.8" H x 10.3" D
  • Plenum Opening: 13-1/2" W by 14 1/16" H
  • UL Listed: Yes
  • .
    Manufacturers Warranty: 5 Years Parts*

    *See manufacturers warranty.
    Reviews Write a Review
    • rayjbenet

      Unit was packaged nicely. Instructions were clear (but lacking a little - see below). Template for cutting the hole into the ductwork was good. Unit seems to perform exactly as it should (its still pre-season here - RH is in the low 50s right now without help). There is no guidance for installing on duct-board (a 3/4 inch insulated fiber "board" that has aluminum facing on the outside). To accomplish this, I cut the hole first using the template, then used 8 joist plates (2" by 6" by 1/6" thick galvanized plates with several nail holes in them - get them at the lumber store) to create strengthened mounts at each corner of the template. For instance, to do the top left corner, put one plate on the outside with a hole near the right hand side of the plate lining up with the screw hole for that corner of the unit. Run a screw through that hole, and as it starts to peek out the other side of the duct-board, catch the exact same hole on a second plate (inside the duct-board). Then put 3 screws (I used coated deck screws) through three other holes on the plates (screwing through both plates to pull them snugly together), then take out the first screw because you need that hole to mount the humidifier. Once I got all four corners reinforced, I used HVAC duct tape (the shiny aluminum stuff) to further secure the plates to the outside of the duct and help distribute the load a bit. {I used screws instead of nuts and bolts because I didn't want to risk dropping a nut down into my ductwork and onto the ac coils} The second problem I had was my own ignorance. I'm not familiar with thermostat wiring, so the symbols didn't mean much to me (e.g., didn't know G was FAN). This combined with the redundant wiring diagrams which were just a little different (one set in the manual and a second set with the humidistat), caused me to go back to the web and learn about thermostat / furnace controls before I could finish the job. Not a bad thing, but a quick paragraph or symbol explanation would have saved that trip. (NOTE: even with that insight, I'm not able to figure out how to get the humidifier to force the fan on - the wiring diagram indicates how to do that, but I can't match that to my limited knowledge of the Intellizone controller I have). The setup I chose is to set the humidifier so that it will not run unless the fan is on. This works fine.) As with two of the other guys, I plumbed into my hot water line. I did use the saddle valve. Worked fine, but once again, there were no instructions, so if you don't know how to install a saddle valve, you may want to YouTube it quickly (its pretty hard to screw up I think, but you really don't want to screw it up!) The humidistat display is weak - meaning that if you can't look at it head-on, its hard to read. Because of the way my furnace is installed, my humidistat is about 7 feet off the floor. I can read it, but its not great. Because the primary RH sensor for the humidistat is attached to the back plate, mounting it with a downward tilt didn't seem like a good idea. Finally, the outdoor thermometer comes with about 6 feet of wire, so you should plan to have however much wire you'll need to get that outside somewhere (in the shade). The unit seems very quiet in the test runs (if I'm walking by the furnace and the fan is running, I'll often use the test mode to force it on and make sure it still cycles the way it should). I'm happiest about the fact that a year ago the quote to do this was $1500. This job was less than $300 and took about 3 hours total. It looks professional and like it should be part of the unit.

    • Steve

      Saddle valve leaked so I installed a pex tee and valve. Easy install with template and tin snips. With hot water and humidifier controlling furnace fan, went from 10 to 40% humidity overnight. Outdoor temp sensor for humidistat keeps windows clear and the house comfortable without having to make any manual adjustments. Recommend predrilling holes to attach to plenum. So far, I love it.

    • Anthony

      Bought the HE300 for my 2200 sqft home. Installation was straight forward and the manual provides more than enough info to get this thing running. Mounted on the supply. Plumbed with hot water. Works great. Quiet unit. I did not use the saddle valve or plastic water line that came with the unit. I preferred to use 1/4" soft copper with a standard fixture valve.

    • DJ

      I have been using the Honeywell TrueEASE HE3001005 for almost a month and have been very happy with the performance. I installed on a dual fuel Lennox furnace and heat pump system. I already had been using a Honeywell VisionPRO thermostat to control the dual fuel furnace set-up, so I did not need the included humidistat. A simple two conductor connection to the existing Equipment Interface module is all that I needed for control and a 115v receptacle within 6 feet is needed for fan power. Plumbing of the drain was accomplished with the included clear hose and tying into the existing furnace drain pipe. The squirrel cage fan can not be heard above the noise of the furnace blower and thus no perceived noise when the unit is in operation. An on-board timer cycles the supply valve at about a 50% duty cycle, which the manufacturer claims will give a 50% water savings versus competitors. I have set my VisonPro thermostat to only humidify when there is a call for heat. I initially hooked into the cold water supply, and the unit would maintain my 2600 ft2 home at around 35% although it was running almost all the time that the furnace ran and rarely reached the humidity set-point. This was especially true when mild outdoor temps meant heat was supplied solely from the heat-pump and thus cooler plenum temps. Actually maintained higher in home humidity with colder outdoor temps which meant more gas furnace operation with higher plenum temps. After re-plumbing the water supply to the hot water line, the unit is more responsive to humidity calls and easily maintains the home humidity at the set point, even in milder weather when the heat is coming mostly from the heat pump. I am sure that overall water use is much lower when supplied with hot water. Overall, very happy with the purchase, installation is clean, and integrated seamlessly with the Honeywell VisionPRO control that I was already using as my HVAC control for totally automatic humidification.

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    Honeywell HE300A1005 - TrueEASE Fan Powered Humidifier 18 GPD with Automatic HumidiPRO Humidistat