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About This Program

The AHAM Verification Program for Dehumidifiers

The Dehumidifier Verification Program is sponsored by the Association of Home Appliance Manufacturers (AHAM).   The program's purpose is to assure the end user that the water removal capacity and energy factor claimed for a dehumidifier which carries the AHAM Verification Mark is accurate.


The water removal capacity and energy factor of a dehumidifier are certified by the manufacturer under the terms of the program, and the testing organization checks the performance of random samples taken from factory, warehouse and/or dealer showrooms throughout the nation.


The terms of the program require that the manufacturer advertise, promote, or otherwise claim only the number of pints of water the dehumidifier can remove from room air in 24 hours at 80F and 60% relative humidity when tested in accordance with the DOE Test Procedure. Participation is voluntary and the program is open to all manufacturers, both members and non-members of AHAM, as well as to entities that market private brand models.  


As the sponsor and the verifying authority of the program, AHAM retains a laboratory (Intertek) to administer the testing of sample units and verification of data.


What is Verified?

Only the water removal capacity and energy factor are verified.  No implication should ever be made that the Mark verifies any other feature or performance factor.


Test Procedures Verify Accuracy of Ratings

The laboratory under contract to AHAM schedules the testing of representative units to determine compliance with the applicable requirements of the DOE Test Procedure and the AHAM Procedural Guide for this program.


Rated Capacity Test

The rated capacity test of the dehumidifier shall be based upon tests outlined in ANSI/AHAM DH-1, Section 7, under the following rated conditions:

Dry-bulb Temperature .............80F

Wet-bulb Temperature ............69.6F

Relative Humidity .....................60%



The water removal capacity and the energy factor of any dehumidifier under Verification must not be less than 95% of its claimed rating. The tolerance included in the AHAM Dehumidifier Verification Program to allow for slight variations in (1) the manufacture of component parts and (2) laboratory measurements.


The AHAM Mark

The AHAM Dehumidifier Verification Mark is issued by AHAM to all manufacturers and private brand sellers of dehumidifiers who are licensees in a program under which the manufacturer certifies that the water removal capacity ratings and the energy factor of all dehumidifiers bearing this mark are determined and accurately stated in accordance with the requirements of ANSI/AHAM DH-1 and the AHAM Procedural Guide for this program.


Application of the Mark to Units

Participants are required to affix, or have affixed, the Verification Mark to all their certified dehumidifiers only at the time and place of manufacture of the dehumidifier.


ENERGY STAR Verification

The U.S. Environmental Protection Agency (EPA) requires third-party certification and verification that a dehumidifier bearing the ENERGY STAR label meets the requirements set for that product. The AHAM Certification program has been approved by EPA to provide verification testing for ENERGY STAR models.  All ENERGY STAR models shown in this directory are required to meet the requirements of both AHAM verification testing and ENERGY STAR verification testing.



AHAM's Directory of Certified Dehumidifiers is a listing of current program models of each participating licensee in AHAM's Dehumidifier Verification Program.


For information on any certified model not listed in this directory, please contact:

         AHAM Dehumidifier Verification Program

         Association of Home Appliance Manufacturers

         1111 19th Street, N.W., Suite 402 

         Washington, DC 20036 

         Telephone: (202)872-5955


Inquiries and Comments

Comments or questions on AHAM's Dehumidifier Verification Program should be directed to AHAM.