Cooling · New Hampshire
How Much Does It Cost to Run a Dehumidifier in New Hampshire?
The short answer
Running a 500W dehumidifier in New Hampshire costs about $0.13 an hour. At 8 hours a day, that’s roughly $32.37 a month and $388 a year.
New Hampshire’s average residential rate was 26.6¢ per kWh in July 2026 (EIA), 45% above the US average.
Source: U.S. EIA, July 2026 data · Updated
Dehumidifier cost by daily use in New Hampshire
| Daily use | kWh/month | Per day | Per month | Per year |
|---|---|---|---|---|
| 1 hour/day | 15.2 | $0.13 | $4.05 | $48.55 |
| 2 hours/day | 30.4 | $0.27 | $8.09 | $97.09 |
| 4 hours/day | 60.8 | $0.53 | $16.18 | $194 |
| 8 hours/day | 121.7 | $1.06 | $32.37 | $388 |
| 12 hours/day | 182.5 | $1.60 | $48.55 | $583 |
| 24 hours/day | 365.0 | $3.19 | $97.10 | $1,165 |
New Hampshire vs other states
At typical use, a dehumidifier costs $388 a year in New Hampshire — $312 less than in Hawaii and $203 more than in Louisiana.
New Hampshire has the 8th-most-expensive residential electricity of the 50 states and DC. New Hampshire electricity rates · all states ranked
Electricity price trend in New Hampshire
26.6¢/kWh in July 2026 — ▲ +16.7% from a year earlier.
How to lower the cost of running a dehumidifier
Dehumidifiers work like small air conditioners, using a compressor to condense moisture out of the air. Most home units draw 300–700W depending on capacity, and the humidistat switches the compressor off once the room reaches the target humidity. Basements in humid climates may need several hours a day in summer. ENERGY STAR models remove noticeably more water per kWh.
- Set the humidistat to 45–50% — lower settings make it run much longer for little benefit.
- Keep doors and windows closed in the room being dehumidified.
- Clean the filter and coils regularly so the compressor works efficiently.
Questions
Frequently asked questions
How much does it cost to run a dehumidifier for 24 hours in New Hampshire?
Running a 500W dehumidifier for 24 hours uses about 12.0 kWh, which costs about $3.19 at New Hampshire’s average rate of 26.6¢/kWh.
How many kWh does a dehumidifier use per month?
At 8 hours a day, a typical dehumidifier uses about 122 kWh a month. In New Hampshire that costs $32.37.
Is it expensive to run a dehumidifier in New Hampshire?
New Hampshire has the 8th-most-expensive residential electricity of the 50 states and DC at 26.6¢/kWh — one of the most expensive. Running a dehumidifier here costs about $388 a year at typical use, compared with $267 at the national average rate.
What is the electricity rate in New Hampshire right now?
The average residential electricity rate in New Hampshire was 26.6¢ per kWh in July 2026, according to the latest EIA data — up 16.7% from a year earlier.
Should I run my dehumidifier 24 hours a day?
Usually not. Set the humidistat to 45–50% and let it cycle on its own; it will only run as long as needed to hold that level.
Dehumidifier costs in nearby states
Other appliances in New Hampshire
Cheapest and priciest states
Sources & method
- Electricity rates: U.S. Energy Information Administration, Electric Power Monthly — average residential retail price, July 2026 (latest available). Retrieved .
- CO₂: EIA State Electricity Profiles, 2024 emissions rate of in-state power generation.
- Default usage for dehumidifier: 8 hours a day. Typical power 500W.
- Formulas, duty cycles and limitations: methodology. Data download: open data (CC BY 4.0).