A dehumidifier collects water vapor from the air, decreasing the humidity of the surrounding area. Dehumidifiers include both portable and whole-home units. Portable dehumidifiers can be easily moved from one room to another, while whole-home dehumidifiers are often used in conjunction with a home’s HVAC system and are designed to be connected to ductwork. Dehumidifiers work by using a refrigeration system to cool air to the point where moisture in the air condenses.


The current standards for dehumidifiers took effect in 2019 and represent energy savings of about 15-25% relative to the previous standards. 

In 2023, DOE proposed amended standards for dehumidifiers, which represent energy savings of about 10-37% relative to the current standards.

*The energy efficiency metric, integrated energy factor (IEF), is expressed in terms of liters of water removed per kWh of electricity consumed (L/kWh).


As of 2020, about 17% of US homes used a dehumidifier. The efficiency of dehumidifiers can be improved through the use of more efficient compressors and larger heat exchangers.

Savings through what year?: 2048
Energy saved (quads): 0.30
CO2 savings (million metric tons): 18.6
Net present value savings ($billion) 3% discount rate: 2.71
Net present value savings ($billion) 7% discount rate: 1.28


Federal Date States
Potential Effective Date of Updated Standard 2027
Updated DOE Standard Due 2024
3rd Federal Standard Effective 2019
Potential Effective Date of Updated Standard 2019
3rd Federal Standard Adopted (DOE) 2016
Updated DOE Standard Due 2016
Test Procedure - Last Revised - Active Mode 2015
Test Procedure - Last Revised - Standby/Off Mode 2012
2nd Federal Standard Effective 2012
1st Federal Standard Effective 2007
2nd Federal Standard Adopted (Congress) 2007
EPACT Initial Federal Legislation Enacted 2005
1st Federal Standard Adopted (Congress) 2005

Timeline reflects state standards from 2001 to present; federal standards from inception to present.