Dehumidifiers are popular electrical appliances that work by converting water to vapor and releasing it to add moisture to the air. If you live in a dryer climate, dehumidifiers could be a perfect addition to your home as they bring with them a wide variety of benefits for your health and your home. They can prevent your skin, eyes, and throat from drying out as well as preventing the paint on your walls from cracking.
Of course, these benefits come at a price as you'll likely have to run your humidifier multiple times a week, sometimes throughout the night, to achieve the health benefits. The EPA calculates that dehumidifiers account for less than 1% of your annual electricity usage. But how much electricity your humidifier actually consumes per hour depends on the size and type of your humidifier. Some dehumidifiers are more efficient than others.
We're here to help you decode your energy costs so you can unlock savings. Check out our humidifier energy cost calculator below to see how much your humidifier will cost to run every day.
How many watts does a dehumidifier use?
Dehumidifiers have a wide wattage range depending on the size and type of the humidifier. Portable dehumidifiers typically consume between 30 and 50 watts while whole-home dehumidifiers can use up to 250 watts per hour. To calculate the most accurate number for your watts, look through the manual or on the back of your humidifier for either the exact watts or the amps and volts. You can multiply amps by volts to calculate watts.
Not all dehumidifiers are created equal. An Energy Star humidifier will likely be much more energy-efficient than an older humidifier which likely uses more electricity and is less efficient. And a whole-home humidifier will use much more electricity than a portable one. Here are some common types of dehumidifiers and their average energy usage and cost-of-operating.
Power (in Watts)
Cost per hour*
Cost per month*
|30 Pint||300 W||3.9¢||$9.36|
|50 Pint||550 W||7.1¢||$17.16|
|70 Pint||650 W||8.4¢||$20.28|
*assuming that the electricity rate is 13¢ per KWH and the dehumidifier runs for 8 hours per day
Upgrade to an Energy Star rated dehumidifier
Energy Star dehumidifiers are the most efficient dehumidifiers on the market. If you’re purchasing a new humidifier, you may want to consider the cost of operating the dehumidifier over time into your budget. While an Energy Star dehumidifier may be more expensive up front, you will likely save money over time on your running cost.
Only run your dehumidifier when necessary
You also want to make sure that you aren’t running your dehumidifier unnecessarily. The excess moisture will cost you on your electricity bill.
Use your dehumidifier to lower your heating costs in the winter.
Humid air feels warmer. So when you’re heating your home in the winter, try running your dehumidifier at the same time to make your home feel warmer. You'll be able to lower your thermostat, which will help you save a lot of money during the cold winter months!
Choose Perch Energy
, we're on a mission to make cleaner energy more accessible, more affordable, and more equitable for all. Whether you rent an apartment, own a home, or run a business, Perch offers multiple ways to save money on your electricity bills, or even help the planet, too.
- For guaranteed savings on your annual electricity cost, join a community solar project in your area. Perch will help match you to a local solar farm—you'll support the operations of that farm so that it can generate and contribute as much clean, solar energy to the overall grid. You don't directly receive electricity from the solar power you're supporting, but thanks to government incentives, you'll get credits toward your own utility bill. Essentially, you're being rewarded with discounts on your own electricity because you're enabling solar generation and development in your state.
- With Perch, you can take your fossil-fuel-fighting, money-saving ways even further when you also switch your home or business' electricity plan to cleaner energy. If you're on your utility's default basic service rate, it's a "mixed" energy plan (generated partly by fossil fuels, partly by renewable resources). But Perch can switch you to a low-cost cleaner energy plan—outside of what your utility is offering—that's backed 100% by clean, renewable resources like solar and wind. We'll find you a price that's lower than the market rate for similar options in your area. You don't have to do anything differently, but you'll feel great knowing that your personal electricity usage is now contributing to a healthier planet, and you've reduced your everyday carbon footprint.