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HUMIDIFIER SAFETY

PLEASE READ AND SAVE 
THESE IMPORTANT 
SAFEGUARDS

IMPORTANT INSTRUCTIONS

When using electrical appliances, basic safety precautions
should always be followed to reduce the risk of fire, elec-
tric shock, and injury to persons, including the following:

1. Read all instructions before using the appliance.

2. To avoid fire or shock hazard, plug the appliance

directly into a 120V AC electrical outlet.

3. Keep the cord out of heavy traffic areas. To avoid fire

hazard, NEVER put the cord under rugs or near heat
registers.

4. DO NOT place humidifier near heat sources such as

stoves, radiators, and heaters. DO locate your humidifier
on an inside wall near an electrical outlet. The humidifier
should be at least 4” away from the wall for best results.

5. NEVER place humidifier in an area where it is accessible

to children. NEVER use humidifier in a closed room,
particularly where a child may be sleeping, resting, or
playing (a closed room may result in excessive humidity).

6. WARNING: Do not attempt to refill humidifier without

first unplugging the unit from its electrical outlet.
Failure to heed this warning may cause personal
injury. Be sure to unplug the unit by pulling on the
plug and not the cord.

7. Never place anything over moisture outlet when the

unit is running.

8. NEVER drop or insert any object into any openings.

9. DO NOT operate any appliance with a damaged cord

or plug, after the appliance malfunctions, or if it has
been dropped or damaged in any manner. Return
appliance to manufacturer for examination, electrical
or mechanical adjustment, or repair.

10. Use appliance only for intended household use as

described in this manual. Any other use not recom-
mended by the manufacturer may cause fire, electric
shock, or injury to persons. The use of attachments
not recommended or sold by the manufacturer may
cause hazards.

11. DO NOT use outdoors.

12. Always place humidifier on a firm, flat, level surface. A

waterproof mat or pad is recommended for use under
the humidifier. NEVER place it on a rug or carpet, or
on a finished floor that may be damaged by exposure
to water or moisture.

13. DO NOT allow the Moisture Outlet to directly face the

wall. Moisture could cause damage, particularly to
wall paper.

14. Humidifier should be unplugged when not in use.

15. NEVER tilt, move, or attempt to empty unit while it is

operating. Shut off and unplug before removing the
water tank and moving the unit.

16. This humidifier requires daily and weekly maintenance

to operate appropriately. Refer to daily and weekly
cleaning procedures. Use only cleaners and additives
recommended by the manufacturer.

17. NEVER use detergents, gasoline, glass cleaner, furniture

polish, paint thinner, or other household solvents to
clean any part of the humidifier.

18. Excessive humidity in a room can cause water 

condensation on windows and some furniture. If this
happens, turn the humidifier OFF.

19. Do not use humidifier in an area where humidity level

is in excess of 50%. Use a hygrometer, available at
your local retailer or through the manufacturer, to
measure the humidity.

20. DO NOT attempt to repair or adjust any electrical or

mechanical functions on this unit. Doing so will void
your warranty. The inside of the unit contains no user
serviceable parts. All servicing should be performed
by qualified personnel only.

21. Never place housing under water flow or immerse in

liquids.

22. Do not plug in the cord with wet hands: electric

shock could result.

23. Do not pour water in any openings other than the

water tank.

24. To prevent damage to surfaces, do not place humidifi-

er under overhanging surfaces.

25. NEVER operate unit without water in the tank.

26. Use both hands when carrying full tank of water.

PLEASE SAVE THESE 
INSTRUCTIONS

CONSUMER SAFETY INFORMATION

THIS PRODUCT IS EQUIPPED
WITH A POLARIZED PLUG (a
plug having one blade wider than
the other). This plug will fit into
the power outlet only one way. If
the plug does not fit fully into the

outlet, reverse the plug. If it still does not fit, contact quali-
fied personnel to install the proper outlet. 

DO NOT DEFEAT THE SAFETY PURPOSE OF THIS
POLARIZED PLUG IN ANY WAY.

PLEASE READ AND SAVE
THESE IMPORTANT 
SAFETY INSTRUCTIONS

CONSUMER SAFETY INFORMATION

NOTE:

This is an electrical appliance and requires atten-

tion when in use.

NOTE:

If moisture forms on the walls or windows of the

room, turn off the humidifier. The room already has plenty
of humidity and additional moisture may cause damage.

NOTE:

DO NOT block air inlet or outlet.

Cord and Plug Installation Safety Instructions

The length of cord used on this appliance was selected to
reduce the hazards of becoming tangled in, or tripping
over a longer cord. If a longer cord is necessary an
approved extension cord may be used. The electrical rating
of the extension cord must be equal to or greater than the
rating of the humidifier. Care must be taken to arrange the
extension cord so that it will not drape over the countertop
or tabletop where it can be pulled on by children or acci-
dentally tripped over.

HOW COOL MIST WORKS

Your Bionaire

®

Cool Mist humidifier draws dry air through

the air intake grill area. This air is then passed through 6
moisture-laden wick filters, which retains the minerals and
deposits in the water. The resulting moist air is directed
back into the room from the top air grill. 

NOTE:

This humidification system provides a cool, invisible

moisture output. It is normal not to see the mist.

NOTE:

A humidity level below 20% can be unhealthy and

uncomfortable. The recommended humidity level is
between 40%-50%.

IONIZER

Your Humidifier has an independently controlled ionizer,
which, when turned on, releases negative ions into outgoing
air. Ions are tiny particles that carry a positive or negative
charge. These ions exist naturally around us, in the air, water
and ground. Both positive and negative ions are colorless,
odorless and completely harmless.

Negative ions help the air purification process by attaching
themselves to very small airborne particles in the room.
These particles take on a negative charge and may join
with positively charged particles such as dust, pollen,
smoke and pet dander to form larger particles that are then
more readily captured by the filter system, or they may be
attracted to positively charged surfaces like walls or floors.

You may also note after extended use, that dust may have
collected around the grills or front panel. This is from the
ionization affect caused by the negative ions exiting from
the air outlet. This is additional evidence of the air cleaning
effectiveness of negative ions. The dust can be easily
removed with a clean, damp cloth or soft brush.

PRE-OPERATING INSTRUCTIONS

1. Be sure the humidifier is switched to OFF and the unit

is disconnected from the electrical outlet.

2. Select a location for your humidifier, on a flat surface,

about 4” away from the wall. DO NOT place the
humidifier on a finished floor or near furniture which
can be damaged by moisture or water. Place on a
moisture-resistant surface.

FILLING THE WATER TANKS

To fill at sink:

1. Remove the tanks from the base of the humidifier and

bring to the faucet. Lay the tank on its flat side. Unscrew
tank cap and extend funnel until completely exposed.
Turn the opening towards the faucet and fill with cool
tap water. DO NOT fill with warm water as this may
cause leaking. Replace the cap on each tank FIRMLY. 

2. When full, carry each tank to the humidifier and place

onto the base. Each tank holds 1.5 gallons of water
and the base holds 0.5 gallons of water. The tanks
will immediately begin to empty into base.

To fill at bath tub:

1.  Remove the tanks from the base of the humidifier and

bring to the faucet. Unscrew the tank cap and
expose the funnel completely. Flex the plastic funnel
and remove it from the tank. Unscrew the funnel from
the tank cap and fill at the tub. The funnel is not neces-
sary for the unit to work properly, so you may dispose
of it or screw it back on again if you wish to fill at the
sink. DO NOT fill with warm water as this may cause
leaking. Replace the cap on each tank FIRMLY.

2. When full, carry each tank to the humidifier and place

onto the base. Each tank holds 1.5 gallons of water
and the base holds 0.5 gallons of water. The tanks
will immediately begin to empty into base.

OPERATING INSTRUCTIONS

Your humidifier is equipped with a technologically
advanced Digital Humidistat. You can set the humidifier to
run continuously in manual mode or set the Digital
Humidistat to your desired humidity setting. The Digital
Humidistat will automatically turn the humidifier ON or OFF,
depending on the preset comfort level. The comfort level
ranges from 30% and 65% relative humidity.

MANUAL MODE INSTRUCTIONS

1. Plug the humidifier into a 120V AC electrical outlet.

2. The display will show the current room humidity.

3. To start the unit, push the MODE button (     ) once

for the HIGH (3) manual setting. 

4. Press the button again for the MEDIUM (2) manual

setting and again for LOW (1). After the selection is
made, the display will return to show the current
room humidity.

5. To stop the unit, press and hold the button for two

seconds, or keep pressing the button until the display
reads OFF (OF).

HUMIDISTAT INSTRUCTIONS

To  take advantage of the Digital Humidistat, press the
MODE button (    ) until the speed is set in either the Auto
HIGH (A3), Auto MEDIUM (A2) or Auto LOW (A1) setting.
Then adjust the set humidity by using the up and down
buttons.  Humidity will increase in increments of 5%. When
the humidity level is set, the display will return to show the
current room humidity.  When the room humidity level rises
above the set humidity, the humidifier will stop. When the
humidity level drops below the set humidity, the humidifier
will turn on automatically.

NOTE:

Allow up to 30 minutes for the filter to fully absorb

water and for the unit to produce moisture.

NOTE:

The Digital Humidistat Humidifier has memory. This

means that when you turn the unit back on, it will be at the
last setting the humidifier was set at.

If you do not plan to use the humidifier for two or more
days, make sure any residual water is drained from the
water reservoir, base and wick filters to prevent algae or
bacteria growth.

USING THE PROGRAMMABLE TIMER

The Digital Humidistat allows the user to program the
humidifier to come on at a preset time, or turn off after a
set amount of time.

Setting the Off Timer:

1. Select the Mode and or humidity you wish the humidifier

to run in.

2. While the humidifier is running, press and hold the up

and down buttons simultaneously for 2 seconds.  The
display will flash “00”.  

3. By pressing the up and down buttons, program the

humidifier to turn off up to 16 hours later in increments
of 1 hour.  

4. After setting the timer, the display will return to show

the current room temperature.  The Timer light will 
illuminate to show that the timer is activated.

5. After the predetermined length of time has passed,

the humidifier will automatically shut off.

Setting the On Timer:

1. While the humidifier is off, press and hold the up and

down buttons simultaneously for 2 seconds.

2. By pressing the up and down buttons, program the

humidifier to turn on up to 16 hours in advance in
increments of 1 hour.

3. The humidifier will continue to run on Auto Mode (HI)

at 45% until the user shuts it off.

USING THE IONIZER

1. Press the Ionizer button on and the LED will illuminate.

2. To turn off, press the Ionizer button again. 

PERMATECH™ FILTER CLEANING INSTRUCTIONS

1. The water tray should be

cleaned when you clean the
filter.  The water tray is a
convenient way to carry the
filter to prevent dripping.

2. Mix 1 gallon warm tap water with

1 teaspoon concentrated anti-
bacterial liquid dish washing
soap.

3. Fully submerge filter in soap solution for 15-20 minutes.

4. Dunk filter in soap solution several times then gently

press to release the soapy water.  Be sure not to
wring, pull or scrub filter as this will degrade the filter.

5. Run under cool tap water until there is no soap

remaining.  Some discoloration may still be visible,
this is normal and does not affect performance.

6. Gently shake or press the filter to remove excess

water.  

7. The filter can be put directly into the humidifier while

still damp if it is to be used right away, or allow filter
to dry completely if humidifier is to be stored.

Should your filter become damaged or lost, please call the
customer service number listed in the manual for a
replacement part. The part number for this filter is:
BWF100P.

CLEANING AND MAINTENANCE INSTRUCTIONS

Humidifiers provide comfort by adding moisture to dry,
heated indoor air. To get the most benefit from the humidifier
and avoid product misuse, follow all instructions carefully,
specifically the operation, care and maintenance guidelines.
Please note that this is an electrical appliance, and
requires attention when in use.

In addition, if you do not follow the recommended care
and maintenance instructions, micro-organisms may be
able to grow in the water within the humidifier’s reservoir.
You must routinely follow the cleaning procedures that follow
in order to ensure proper, efficient operation of your
humidifier.  Proper maintenance and cleaning is essential
to the continued performance of your unit and the avoidance
of algae or bacteria build-up.

DAILY MAINTENANCE

1. Be sure the unit is OFF and is disconnected from the

electrical outlet.

2. Remove the housing and the reservoir from the

humidifier and place in sink or tub.

3. Carry the base of the unit to the sink, remove the

wicks, place in sink, drain any remaining water and
rinse thoroughly to remove any sediment or dirt.  Wipe
clean, and dry with a clean cloth or paper towel.

NOTE:

the base and wick frame are dishwasher safe

TOP RACK ONLY.

4. Drain the water from the tank into the sink and rinse

tank thoroughly. Wipe clean, and dry with a clean
cloth or paper towel.

5. Put filters back in wick frame, replace on base, replace

the housing, then refill tank with cool tap water as
instructed earlier in the Filling Instructions.  Do not overfill.

6. Follow Operating Instructions.

WEEKLY MAINTENANCE

Remove Scale:

1. Repeat steps 1-4 above.

2. Clean the base by partially filling the base with one 8-oz

cup of undiluted white vinegar, or use Clean-Away™ by
Bionaire

®

. Let solution stand 20 minutes, cleaning all

interior surfaces with a soft brush. Dampen a cloth
with undiluted white vinegar and wipe out entire base
to remove scale.

3. Rinse with clean warm water to remove scale and the

white vinegar solution before beginning to disinfect the
reservoir.

DISINFECT HUMIDIFIER BASE AND RESERVOIR

1. Fill humidifier base with 1/4 gallon of water and 1/2

teaspoon of chlorine bleach.

2. Fill the reservoir 1/2 full with water and 1/2 teaspoon

of chlorine bleach.

3. Let the solution stand for 20 minutes, swishing every

few minutes. Wet all surfaces.

4. Carefully empty the base and reservoir after 20 minutes,

and rinse with water until you cannot detect any
bleach smell. Dry with a clean cloth or paper towel.

5. While the unit is on, check the Filter Monitor to see if it

is time to wash the filter. Depending on water hardness
in your area, it may be necessary to wash the filter
every 1-2 months. Re-insert the wick filters into the
wick frame. 

Read instructions before operating. 

Retain for future reference.

Instruction Leaflet

INFO-LINE 

If after having read this leaflet, you have any

questions or comments on your humidifier, 

call 

1-800-253-2764

in North America.

6. Refill the water tank as directed with cool tap water,

replace the humidifier housing, and turn the unit on.

STORAGE INSTRUCTIONS

If your humidifier will not be in use for two days or more, or
at the end of the season follow these instructions.
1. Clean and dry the humidifier thoroughly as per the

“Weekly Maintenance” instructions.

2. Let the humidifier dry completely before storing. Do not

store with water inside the base or water reservoir. 

3. Remove the reservoir cap. Do not store with the reservoir

cap in place.

4. Do not leave wick filters inside the humidifier.
5. Store in a cool dry location.

SERVICE INSTRUCTIONS

1. Do NOT attempt to repair or adjust any electrical or

mechanical functions on this unit. Doing so will void
the warranty. The inside of the unit contains no user
serviceable parts. All servicing should be performed
by qualified personnel only.

2. If you need to exchange the unit, please return it in its

original carton, with a sales receipt, to the store where
you purchased it. If you are returning the unit more
than 30 days after the date of purchase, please see
the enclosed warranty. 

3. Should your humidifier require service, please call 

1-800-253-2764 in North America for further assis-
tance. 

4. If you have any other questions or comments, feel

free to write to us or 

visit our website 

www.bionaire.com

Bionaire

®

JCS/THG, LLC
303 Nelson Avenue
Neosho, MO 64850

TroubleShooting for your Cool Mist Humidifier

Trouble

• LED not illuminated.

• Mist output minimal to

none.

• Water leaks from water 

reservoir.

• Water Filter turns brown.

• Film on water reservoir.

• Water cloudy.

• Humidistat cycles on/off.

• Very tight reservoir cap.

Probable Cause

Unit not plugged in. 

Power failure.

Filter has not absorbed 
water.

Mineral buildup in base.

Humidistat is set too low.

Wick Filter needs to be 
cleaned.

Normal operation.

Rubber O-ring is missing 
or improperly placed.

Reservoir Cap not tight 
enough.

Your filter needs to be 
cleaned.

In areas with particular 
hard water your wick filter
will need to be washed 
frequently.

Mineral deposits cause 
film on tank to build up.

Filter needs to be cleaned.

Using warm water to refill
reservoir.

Humidifier is reacting 
to room humidity level.

Over tightened.

Solution

Plug in unit.

Check circuit breaker or 
outlet.

✔ 

Wait 15 minutes before 
starting humidifier.

Regular cleaning of tray
after each use will help
keep the unit functioning
properly.

Set the humidistat to 
high.

✔ 

Follow cleaning instruc-
tions in manual.

Mist is invisible. 

Check to see if inlet or 
outlet grills are blocked.

✔ 

Remove reservoir cap 
then replace or reposition
ring.

Tighten the reservoir 
cap.

✔ 

Follow cleaning instruc-
tions in manual.

Use Clean-Away

TM

Solution (DMS216), to
order call 1-800-253-2764,
or visit www.bionaire.com.

Follow cleaning instructions
in manual.

Refill using cool water.

Set the humidistat to a
higher or lower setting.

Add liquid soap or 
petroleum jelly to cap 
gasket to ease opening.

COOL MIST

humidifier

MODEL 

BCM4655-CN

Water

Reservoir

Housing
Base

TWO (2) YEAR LIMITED WARRANTY

SAVE THIS WARRANTY INFORMATION

A. This Warranty applies only to the original purchaser of

this product.

B. This Warranty applies ONLY to repair or replacement

of any supplied or manufactured parts of this product
that, upon inspection by JCS/THG, LLC authorized
personnel, is shown to have failed in normal use due
to defects in material or workmanship. JCS/THG, LLC
will determine whether to repair or replace the unit.
This Warranty does not apply to installation expenses.

C. Operating this unit under conditions other than those

recommended or at voltages other than the voltage
indicated on the unit, or attempting to service or modify
the unit, will render this WARRANTY VOID.

D. Unless otherwise proscribed by law, JCS/THG, LLC

shall not be liable for any personal injury, property or
any incidental or consequential damage of any kind
resulting from malfunctions, defects, misuse, improper
installation or alteration of this product.

E. All parts of this product, excluding filters, which are

covered under separate warranty, are guaranteed for a
period of 2 years as follows:

1. Within the first 30 days from date of purchase, the

store from which you purchased your product
should replace this product if it is defective in material
or workmanship (provided the store has in-stock
replacement.) If you intend to assert any claim in
connection with the product, please follow the
instructions in paragraph F.

2. Within the first 24 months from date of purchase,

JCS/THG, LLC will repair or replace the product if it
is defective in material or workmanship, subject to
the conditions in paragraph G.

F. If you have any other problem or claim in connection

with this product, please write to our Consumer
Service Department.

G. IMPORTANT RETURN INSTRUCTIONS. Your

Warranty depends on your following these instructions
if you are returning the unit to JCS/THG, LLC:

1. Carefully pack the item in its original carton or other

suitable box to avoid damage in shipping.

2. Before packing your unit for return, be sure to

enclose:

a) Your name, full address with zip code and 

telephone number

b) A dated sales receipt or PROOF OF PURCHASE,

c) Your $10.00 (USD) check for return shipping and

handling, and

Fig.1

Digital Control

Filter Monitor

Wick Filter

Easy Fill

Funnel

Reservoir
Handle

d) The model number of the unit and the problem 

you are having. (Enclose in an envelope and tape
directly to the unit before the box is sealed.)

3. JCS/THG, LLC recommends you ship the package

U.P.S. ground service for tracking purposes.

4. All shipping charges must be prepaid by you.

5. Mark the outside of your package:

Bionaire
JCS/THG, LLC
303 Nelson Avenue
Neosho, MO 64850

SHIPPING AND HANDLING CHARGES: $10.00 (USD)

This Warranty gives you specific legal rights, and you may
have other rights which vary from state to state. The provisions
of this Warranty are in addition to, and not a modification
of, or subtraction from, the statutory warranties and other
rights and remedies contained in any applicable legislation.
To the extent that any provision of this Warranty is inconsistent
with any applicable law, such provision shall be deemed
voided or amended, as necessary, to comply with such
law.

©

2006 JCS/THG, LLC

Bionaire

®

, the Bionaire logo™,  PERMAtech™,

FilterClean™ and Clean-Away

TM

are trademarks of

JCS/THG, LLC.
BCM4655CN06EFM1

Printed In China

Frequently Asked Questions

Question

What are the variables that 
affect run time?

How do I remove film on 
water tank?

How can I extend the run 
time?

Answer

The estimated run time for this humidifier is based on average
room conditions. The actual run time of your humidifier is
dependent on numerous variables such as:

✔ 

Air exchange in the room where the humidifier is placed.

✔ 

Room construction of the room where the humidifier is placed.

✔ 

Temperature of the room where the humidifier is placed.

✔ 

Humidity levels in the room where the humidifier is placed.

✔ 

Movement of occupants and the opening and closing of 
doors in the room where the humidifier is placed.

✔ 

Home furnishings in the room where the humidifier is placed.

✔ 

See Daily Maintenance instructions. Regular cleaning is 
recommended.

✔ 

Run your unit on the lowest setting.

✔ 

If your unit has electronics, set it to your desired humidity 
level. The unit will turn on and off, which will extend the run 
time.

✔ 

Fill the tank all the way full, place it on the base, let the 
water empty into the base until it stops bubbling, then refill 
the tank full again. This ensures maximum water capacity 
and will extend run time.

Fig.2

9100030004064

Ionizer

BCM4655CN06EFM1.qxd  7/3/06  4:38 PM  Page 1

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