Cooling · Maryland
How Much Does It Cost to Run a Portable Air Conditioner in Maryland?
The short answer
In Maryland, a portable air conditioner drawing 1,200W costs about $0.26 per hour — roughly $62.52 a month if it runs 8 hours a day.
That’s based on Maryland’s average residential rate of 21.4¢/kWh (EIA, July 2026), 17% above the US average.
Source: U.S. EIA, July 2026 data · Updated
Portable Air Conditioner cost by daily use in Maryland
| Daily use | kWh/month | Per day | Per month | Per year |
|---|---|---|---|---|
| 1 hour/day | 36.5 | $0.26 | $7.82 | $93.78 |
| 2 hours/day | 73.0 | $0.51 | $15.63 | $188 |
| 4 hours/day | 146.0 | $1.03 | $31.26 | $375 |
| 8 hours/day | 292.0 | $2.06 | $62.52 | $750 |
| 12 hours/day | 438.0 | $3.08 | $93.79 | $1,125 |
| 24 hours/day | 876.1 | $6.17 | $188 | $2,251 |
Maryland vs other states
At typical use, a portable air conditioner costs $750 a year in Maryland — $932 less than in Hawaii and $304 more than in Louisiana.
Maryland has the 15th-most-expensive residential electricity of the 50 states and DC. electricity prices in Maryland · all states ranked
Electricity price trend in Maryland
21.4¢/kWh in July 2026 — ▲ +13.7% from a year earlier.
How to lower the cost of running a portable air conditioner
A portable AC sits inside the room and vents hot air through a hose, which makes it convenient but less efficient than a window unit: some of the heat it removes leaks back in, and single-hose models pull warm outside air into the room. A common 10,000–12,000 BTU portable unit draws around 1,000–1,300W. Dual-hose models are more efficient in hot climates.
- Keep the exhaust hose as short and straight as possible, and insulate it if it gets hot.
- Choose a dual-hose model for rooms you cool every day.
- Close blinds on sun-facing windows during the hottest hours.
Questions
Frequently asked questions
How much does it cost to run a portable air conditioner for 24 hours in Maryland?
Running a 1,200W portable air conditioner for 24 hours uses about 28.8 kWh, which costs about $6.17 at Maryland’s average rate of 21.4¢/kWh.
How many kWh does a portable air conditioner use per month?
At 8 hours a day, a typical portable air conditioner uses about 292 kWh a month. In Maryland that costs $62.52.
Is it expensive to run a portable air conditioner in Maryland?
Maryland has the 15th-most-expensive residential electricity of the 50 states and DC at 21.4¢/kWh — pricier than most. Running a portable air conditioner here costs about $750 a year at typical use, compared with $642 at the national average rate.
What is the electricity rate in Maryland right now?
The average residential electricity rate in Maryland was 21.4¢ per kWh in July 2026, according to the latest EIA data — up 13.7% from a year earlier.
Do portable air conditioners use a lot of electricity?
They use about as much as a space heater — typically 800–1,500W — and more than a window AC of the same capacity because they are less efficient.
Portable Air Conditioner costs in nearby states
Other appliances in Maryland
Cheapest and priciest states
Comparisons
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 portable air conditioner: 8 hours a day. Typical power 1,200W.
- Formulas, duty cycles and limitations: methodology. Data download: open data (CC BY 4.0).