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2. Let the humidifier dry completely before storing.  

Do not store with water inside the base. 

3. Do not store with the reservoir cap in place.
4. Throw away the wicking filter.  Do not store with wick filter in place.
5. Store in a cool dry location.

When using electrical appliances, basic safety precautions

should always be followed to reduce the risk of fire, electric

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 120 V AC electrical outlet.

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

fire hazard, NEVER put the cord under rugs, near 

heat registers, radiator, stoves, or heaters.

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 it’s electrical outlet.  

Failure to heed this warning may cause personal 

injury.  Be sure to pull 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 

recommended by the manufacturer may cause 

fire, electric shock, or injury to persons.  The use 

of attachments not recommended or sold by The 

Holmes Group, Inc. 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 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 wallpaper.

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.

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 hardware store or through Holmes, 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 

humidifier under overhanging surfaces.

PLEASE READ AND SAVE

THESE IMPORTANT 

SAFETY INSTRUCTIONS

Consumer Safety Information

Note:  This is an electrical appliance and requires 

attention 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.
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 accidentally tripped over.

THIS PRODUCT IS EQUIPPED WITH A POLARIZED AC
(Alternating Current)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 qualified
personnel to install the proper outlet.   

DO NOT DEFEAT THE SAFETY PURPOSE OF THIS 

POLARIZED PLUG IN ANY WAY.

P L E A S E   R E A D   A N D   S A V E   T H E S E   I M P O R T A N T  

S A F E T Y   I N S T R U C T I O N S

F E A T U R E S   -   O P E R A T I O N

R E P L A C I N G   T H E   F I L T E R  

C L E A N I N G   I N S T R U C T I O N S   -   S T O R A G E

CLEANING AND MAINTENANCE INSTRUCTIONS

Humidifiers provide comfort by adding moisture to dry indoor 

air.  To get the most of the benefit from the humidifier and 

avoid product failure, follow all maintenance instructions 

carefully.  If the recommended care and maintenance 

guidelines are not followed, micro-organisms may be 

able to grow in the water within the humidifier.

DAILY MAINTENANCE

1. Before cleaning, turn the power to OFF and unplug the unit 

from the electrical outlet. 

2. Lift off the tank and the housing of the humidifier.
3. Carry the base and the tank to the sink, remove the wick filter,

place in sink, then drain and rinse the base and tank thoroughly

to remove any sediment and dirt. Wipe clean and dry with a 

clean soft cloth or paper towel. (DO NOT use metal cleaning 

utensils or abrasive cleaners.)

4. Put the filter back in the filter supports, replace the housing, then

refill the tank with cool tap water as instructed in filling the water

tank instructions.

WEEKLY MAINTENANCE

Remove scale:
1. Repeat steps 1-3 above.
2. Clean the base by partially filling the base with one 8-oz 

cup of undiluted white vinegar, or by using 

Cleanse Clean™ 

by Holmes

.  Let solution stand 20 minutes, clean all interior 

surfaces with a soft brush. 

3. Dampen a cloth with undiluted white vinegar and wipe out 

entire base to remove scale.

4. Rinse with clean warm water to remove scale and the white 

vinegar solution before beginning to disinfect the tank.

Disinfect tank:
1. Fill tank with 1/2 teaspoon of chlorine bleach and 1/2 gallon 

of water.

2. Let the solution stand for 20 minutes, swishing every few minutes.

Wet all surfaces.

3. Empty the tank after 20 minutes, and rinse well with water until 

the bleach smell is gone.  Dry with a clean cloth or paper towel.

4. Refill the water tank with cool water; replace the housing 

and the water tank.  Repeat ALL Operating Instructions.

HOW COOL MIST WORKS

Your Holmes Cool Mist humidifier draws dry air through the rear 

air intake grill area.  This air is then passed through a moisture-laden

wick filter, 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%.

PRE-OPERATING INSTRUCTIONS

OPERATING INSTRUCTIONS

1. Be sure the humidifier is OFF and 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 your humidifier on furniture; 

a floor location that will not be damaged by moisture is best.

3. Remove the water tank by holding the tank handle and lifting

straight upward (see figure 1). 

4. Remove the main housing by lifting straight upward. Check 

to see that the wick filter is properly in place. Replace the 

humidifier housing.

FILLING THE WATER TANK

NOTE: This humidifier holds about 2.25 gallons of water in the tank

and humidifier base. The humidifier will produce up to 4 gallons of

moisture over a 24-Hour period, depending on the room humidity 

and temperature.
1. Be sure the humidifier is OFF and disconnected from 

the electrical outlet.

2. Remove the tank from the base by holding the handle 

and lifting straight up (see figure 1).

3. Twist off the tank cap located on the bottom of the tank by turning

counter clockwise and fill the water tank with cool, fresh water. 

Do not fill with warm water as this may cause leaking.

4. After filling the tank, replace the tank cap by firmly turning 

clockwise and then replace the water tank on the base.  

The tank will immediately begin to empty into the base.

5. Plug the power cord into a 120V AC electrical outlet.

1. The unit display will turn on when you plug the power cord 

into the electrical outlet.

2. Once the unit is plugged in the digital display will show the 

current room humidity (on the left of the display) and the 

last set humidity level (on the right of the display).

3. To turn the humidifier on press the power button once.  To adjust

the humidifier speed,  press the MODE button.  The humidifier will

start at HI then go to MEDIUM, LO and then the AUTO speeds (HI,

MEDIUM, LO).  The humidifier will start in the last set speed unless

the humidifier has been unplugged.

Note:  If condensation forms on your windows or walls, or your

humidity % on your display reads above 50% then turn the unit off.
When the tank runs out of water push the POWER button OFF and

unplug.  Remove and refill the water tank as instructed, being sure

to follow the Daily maintenance instructions.  Replace the tank into

the base.
NOTE:  If moisture forms on the walls or windows, turn off 

the humidifier.

SETTING THE ACCUSET, PROGRAMMABLE HUMIDISTAT:

Follow the Pre-operating instructions.
The programmable humidistat is designed to operate between 

30% and 65% relative humidity range.  The recommended setting 

is between 40% and 50%.
1. To program a pre-set humidity level, press the MODE button 

until the AUTO speeds are displayed, beginning with AUTO HIGH.  

Choose your desired Auto speed setting. 

2. Once you have chosen your Auto speed, choose your humidity 

setting by pressing the HUMIDITY SET button.  The HUMIDITY 

SET button works in multiples of 5, beginning with lowest 

setting, 30% and ending with highest setting, 65%.  Choose 

the appropriate setting and your Accuset humidistat is now 

programmed.

NOTE:  When the humidity level in the room is less than the humidity

level you have programmed, the humidifier will continue to produce 

Figure 2

Figure 1

A. Circular Filter Supports 
B. Circular Extended Life Filter
C. Humidifier Base

B

C

A

A. Humidifier Tank 

B. Carry Handle

C. Humidifier Housing

D. AccuSet

™ 

Controls

E. Humidifier Base

F. Filter Support

G. AccuSet

Digital Display

H. Filter Check™ Indicator

A

B

C

D

E

F

G

G

moisture.  Once the room pre-set humidity level is met, the humidifier

will stop producing moisture.

REPLACING THE FILTER

Through normal use, waterborne minerals and sediment become

trapped in the wick filter. The harder your water, the greater the

amount of minerals in the water, and the more often you will need

to change your filter.
You will be able to monitor the life of the filter in your humidifier

by checking the Filter Check™ Indicator.  When the unit is off, 

the Filter Check™ Indicator will read in the OFF position.  After 

60 minutes of use, Filter Check™ Indicator (refer to figure 3 

for close-up of indicator) will move from the OFF position and 

indicate your filter condition.  

A brand new filter will register 

in the blue section reading GOOD 

filter.  After frequent use of your

humidifier, the Filter Check™

Indicator will let you know when

the filter needs to be changed.
When the needle is in the red

(CHANGE) section, this means 

the proper amount of moisture is not getting into your air due to the

excessive minerals and sediment that have become trapped on your

filter.  At this point, you should replace your filter.  It is important 

to change your filter as indicated to obtain stated performance level.
To replace the filter, follow the steps below.
1. Be sure the humidifier is switched OFF and disconnected from the

electrical outlet.

2. Remove the tank and main housing to access the base tray.
3. Discard the old filter and follow weekly cleaning instructions.
4. Insert a new filter into the filter support in the base.
5. Replace the main housing and then the tank.
6. Repeat Operating Instruction steps.
It will take about 30 minutes for the humidifier to reach 

maximum output.
You can obtain a new filter by calling 1-800-5-HOLMES in the 

USA or by visiting your nearest retailer or authorized service 

center.  This humidifier takes model HWF65 replacement filter.

Figure 3

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 above.

H

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