FAQs

Q: How many square feet will a 9 Gallon or 12 Gallon Honeywell Steam
Humidifier cover?
A: The Honeywell Steam Humidifier should only be installed if it has been sized properly.
Never use square feet for the measurement. Moisture fills a volume, so use cubic
feet: width x length x ceiling height. Also take into consideration the “tightness” of the
home construction.
Honeywell Steam Humidifier Recommended Sizing
Construction
Type
8,000
CU FT
12,000
CU FT
16,000
CU FT
20,000
CU FT
24,000
CU FT
28,000
CU FT
32,000
CU FT
Tight 9 GPD 9 GPD 9 GPD 9 GPD 12 GPD 9 GPD X2 12 GPD X2
Average 9 GPD 12 GPD 9 GPD X2 9 GPD X2 12GPD X2 12 GPD X3 12 GPD X3
Loose 12 GPD 9 GPD X2 12 GPD X2 12 GPD X3 12 GPD X3 12 GPD X4 12 GPD X4
Q: I have a warranty on an old TrueSTEAM unit. Can I get a new unit with the
RO for exact cost exchange? The homeowner won’t pay me more on a
warranty exchange.
A: The standard Honeywell warranty return process applies. You will receive full credit
for your TrueSTEAM or Honeywell Steam Humidifier which can be applied to the
purchase of a new Honeywell Steam Humidifier. In addition if your application only
requires a new tank, you can warranty return the tank for the improved tank and
gasket.
Q: Do I have to install the provided RO kit?
A: In most applications, the RO kit is a required part of the steam humidifier system.
Please refer to the included water test strip kit. If the tested water falls within the
hardness range that requires a water softener, use a whole-home water softener in
lieu of the RO system.
Q: Why do some of the units come with a tank on the RO kit and some don’t?
A: Both units will service the humidifier properly. Our testing shows that the tankless RO
unit provides less pressure drop. If you get a version with a tank, you may install it
with or without the tank.
Q: Why do I have to use a high temperature rated condensate pump?
A: The pump will have to manage hot water up to 212 F so it must be rated
appropriately. Per the manual, use Hartell A3X-115 condensate pump or equivalent
(212 degree F rating, >1 GPM pump flow rate).
Q: How often should the tank gasket be replaced?
A: The gasket should be replaced every 5 years.
Q: How much scaling can there be in the bottom of the humidifier tank?
A: The amount of scale varies based on individual run time and water quality. Some
scaling because of the mineral deposits in the water supply is normal. The
homeowner should expect to see some buildup in the tank and on the heating
element. Honeywell recommends that the Honeywell Steam Humidifier be manually
cleaned at least once each humidification season.
Honeywell Steam Humidifier
FAQ