Honeywell HEV312 SERIES, Manual

 Step 7

 Step 6

 Step 5

 CLEANING

Cleaning involves two steps, SCALE REMOVAL and DISINFECTING. Be sure to perform these two 

separate steps in the proper order to avoid harmful chemical interactions.

SCALE REMOVAL

NOTE: REMOVE FILTER BEFORE CLEANING.

Failure to remove filter during cleaning will destroy the filter.

 Step 1

 Step 2

 Step 3

 Step 4

Turn off and unplug 

your humidifier.

Remove the water tank 

and carefully set aside.

Remove filter basket.

Remove filter from 

basket. Failure to do so 

will destroy the filter.

Place basket in sink or 

tub and fill the bottom 

of the basket with 

undiluted vinegar.

Let stand for 20 

minutes.

With vinegar in the 

basket, wipe surface 

with a soft cloth  

or brush.

Rinse the filter basket 

thoroughly with water 

to remove scale and 

cleaning solution.

 Step 8

 6

DISINFECTING

 CLEANING 

(

cont

’

d

.)

 Step 2

 Step 3

1 gal

 Step 4

 Step 5

Remove the water tank 

and carefully set aside.

Remove filter holding 

basket.

Remove filter and set 

aside. Failure to do so 

will destroy the filter.

Fill water tank with 

1 tsp. of household 

bleach and 1 gallon  

of cool water

 Step 6

 Step 7

Pour some solution into 

the filter basket.

Let stand for 20 

minutes.

Rinse with water until 

the smell of bleach is 

gone.

 END-OF-SEASON CARE AND STORAGE

•  Follow the CLEANING instructions when the humidifier will not be used for at least one week, or at the 

end of the season.

•  At the end of the season, remove and throw away the filter; do not store with a used filter.

•  Dry the humidifier completely before storing. DO NOT store with water inside the Base or Water Tank.

•  Pack the unit in its original carton and store in a cool, dry location.

•  Before next use, remember to clean your humidifier and install a new filter.

 CONSUMER RELATIONS

 Step 1

NOTES: The use 

of other water 

treatment products 

and chemicals may 

cause deterioration of 

the filter or damage 

the humidifier, 

thereby hindering 

the humidifier’s 

effectiveness.

 7

NOTE:  It is recommended that all maintenance be done in the kitchen or bathroom on a water 

resistant surface. Remove water tank from unit before moving.

For questions, technical support or to order replacement parts, contact Consumer Relations.  
Call us toll-free at: 1-800-477-0457
Hours: Mon-Fri 8:00AM-7:00PM EST
Email: 

consumerrelations@kaz.com

Or visit our website at: 

www.HoneywellPluggedIn.com

Please be sure to specify Model number HEV312.

Purchase replacement filter part number 

HAC-504 Series 

or 

FILTER A

.