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Honeywell HM509H8908 Truesteam 9-Gallon Humidifier

1.9 out of 5 stars 39 customer reviews

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  • Application flexibility - Mount directly to the duct or remotely up to 20 feet away into tight-fitting or unconditioned air spaces
  • Installs in minutes - Limited duct cutting and bracket-mount design takes less than 5 minutes to complete
  • Easy maintenance - Self-regulates cleaning cycles throughout the year. Annual maintenance requires no tools to access and clean, saving time and money on annual contractor service calls
  • 5-year warranty
  • Capacity: 9 gal per day
This item’s packaging will indicate what is inside and cannot be hidden.

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Product Description

Product Description

HM509H8908, Honeywell, Inc., HNYWL TRUESTEAM HUMIDIF SYSTE

From the Manufacturer

TrueSTEAM 9-gallon humidifier with manual H8908 humidistat. Draws 10-amps.

Product Information

Technical Details

Part Number HM509H8908
Item Weight 17.8 pounds
Product Dimensions 19.4 x 16.7 x 11.1 inches
Item model number HM509H8908
Item Package Quantity 1

Additional Information

ASIN B002SBDRAE
Customer Reviews
1.9 out of 5 stars 39 customer reviews

1.9 out of 5 stars
Best Sellers Rank #147,361 in Home Improvements (See top 100)
#2 in Home Improvement > Building Supplies > HVAC > Furnace Parts & Accessories > Furnace Humidifiers
#828 in Home Improvement > Electrical > Testers > Multi Testers
Shipping Weight 17.1 pounds
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available September 5, 2008

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

We had the Honeywell Truesteam installed on our new home. It worked fine the first year, but by the second year it kept flashing service messages, which of course in the manual it does not say what the flashes mean. We ended up having a certified HVAC tech come out to examine it, He could not get it working so he contacted his distributor. The distributor after finding out the date code admitted they had a BAD batch of units made around that date. Honeywell did replace the unit, but will not pay for any labor even though they admit the unit was a lemon. We have contacted Honeywell many times and they will not stand behind their product. Needless to say we are stuck with a $350.00 repair bill. We even asked customer service if business is that good that they can afford losing future business? They do not understand the power of word of mouth and the internet
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UPDATE 01/26/2012

I do NOT recommend this product.

After only 1 year in service and 2 cleanings, the unit has failed. As stated in the Owners Manual (not the "installers" manual, the OWNERS manual), for a failure during the warranty period (5 years, which of course sounds great unless you attempt to obtain warranty repairs), you should call Honeywell customer service for a repair or replacement. And even though I read to the customer service representative directly from the Owners Manual that the warranty states that they would repair or replace the unit, he would not, unless a "licensed installer" calls.

The poorest customer service I have every dealt with.

Do not buy.

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I installed this item in less than a day with a drill, 1 3/4 inch hole saw (rated for metal), wire cutters / strippers, pliers, nut drivers, screw driver with Torx bit, tubing cutter, brazing torch, solder, solder paste, sandpaper and a few other hand tools.

Having a down-draft HVAC and a slab foundation, I needed to install the control unit remotely from the HVAC supply thus I purchased the 10 foot remote option, installed the control on the blower chamber (which is above the furnace and ac coil), then installed the remote steam outlet between the furnace and ac coil below the control unit. Having installed the remote steam outlet below the control unit, "steam rated" t-fittings and p-traps were required as per Honeywell documentation (and common sense). Unfortunately, Honeywell does not offer "steam rated" t-fittings or p-traps as part of the high priced remote installation package ($150.
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4 Comments 38 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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When they work, they work good, but they don't last for long. Either parts break (I've had a bad solenoid and bad sensors that I've had to replace), or they fill up with scale and require cleaning monthly (if you don't have a filter, or use the in-line filter that does little at best). For the price of these things, they should last a lot longer. Again, the in-line filter that you can get for these is garbage. If you do have this humidifier, save yourself some time, and get a reverse osmosis filter for it. I installed this one on mine and it's a huge improvement in reducing scale : iSpring 5 Stage Reverse Osmosis Filter and cheaper/better than the Honeywell reverse osmosis alternative.

Regarding Honeywell support, it pretty much sucks. If you aren't a licensed contractor, they won't help you period... You have to pay someone to tell you what you already know so that they can call and work with tech support. It's far cheaper just to swap out parts and see if your issue is fixed than to call in a service tech; not that I should have to replace parts after only two winters.
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worst customer service ever!!

I purchased this unit as part of a $25,000 Geo thermal heat pump installation and even went so far as to insist on Honeywell components where possible because, at least in the past have associated Honeywell with quality.

The unit worked great for 2 years and then started flashing error codes- 6 blinks and no heat, no problem, I have a 5 year warranty!. Now the fun begins.

On the first call to technical support, I was told to clean the unit (even though I have been religious on keeping the unit clean and it had only been a month since it was previously cleaned) and reset it. So I did this. The unit comes on and works for about 6 hours. Then the error codes again, this time 2 blinks and no heat. I call customer service and get someone that speaks broken English that I can barely understand. I explain my situation and ask for either a water sensor be sent to me (2 blinks per the troubleshooting guide= water sensor failure plus all of the internet searches I did point to that as the likely cause) *or* a replacement unit. Each statement they made was ' you need to call a HVAC technician' or, 'Please go thru your installer/contractor for them to come check it out. I pointed out to them several times that there isn't anything in the warranty statement that states that I have to go thru a dealer to have the warranty honored. Its one screw to remove to change the water sensor and the instructions for how to do so is even in the 'homeowners' guide. Its was a simple fix- I just needed the part.
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