U.S. residential electricity EIA data: July 2026 US average 18.3¢/kWh Updated
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Heating · Arizona

How Much Does It Cost to Run an Oil-Filled Radiator in Arizona?

The short answer

A typical 1,500W oil-filled radiator costs about $0.16 per hour to run in Arizona, or $39.30 a month at 8 hours a day.

The estimate uses Arizona’s average residential electricity price of 15.4¢/kWh from EIA (July 2026) — 16% below the national average.

Source: U.S. EIA, July 2026 data · Updated

Oil-Filled Radiator cost by daily use in Arizona

Cost at 15.4¢/kWh, the Arizona average (EIA, Jul 2026)
Daily usekWh/monthPer dayPer monthPer year
1 hour/day 31.9 $0.16 $4.91 $58.94
2 hours/day 63.9 $0.32 $9.83 $118
4 hours/day 127.8 $0.65 $19.65 $236
8 hours/day 255.5 $1.29 $39.30 $472
12 hours/day 383.3 $1.94 $58.95 $707
24 hours/day 766.6 $3.88 $118 $1,415

Arizona vs other states

At typical use, an oil-filled radiator costs $472 a year in Arizona — $1,000 less than in Hawaii and $81.56 more than in Louisiana.

Arizona has the 19th-cheapest residential electricity of the 50 states and DC. electricity prices in Arizona · all states ranked

Electricity price trend in Arizona

15.4¢/kWh in July 2026 — ▲ +0.3% from a year earlier.

How to lower the cost of running an oil-filled radiator

An oil-filled radiator heats sealed-in oil, which then releases heat slowly through the fins. It is not more efficient than a fan heater — electricity to heat is still about 1:1 — but the stored heat means the thermostat switches the element off for longer stretches once the room is warm. We assume the element is on about 70% of the time, so a 1,500W radiator averages roughly 1.05 kWh per hour of use. Expect the real number to be higher in a cold, drafty room and lower in a well-insulated one.

  • Set the thermostat dial to the lowest comfortable setting and let the oil do the work.
  • Place it near the coldest wall or under a window, away from furniture that blocks the fins.
  • Switch to the lower power setting (600–900W) once the room is up to temperature.
  • Heating seasons in Arizona are short, so most households only run a oil-filled radiator for a few weeks a year.

Questions

Frequently asked questions

How much does it cost to run an oil-filled radiator for 24 hours in Arizona?

Running a 1,500W oil-filled radiator for 24 hours uses about 25.2 kWh, which costs about $3.88 at Arizona’s average rate of 15.4¢/kWh.

How many kWh does an oil-filled radiator use per month?

At 8 hours a day, a typical oil-filled radiator uses about 256 kWh a month. In Arizona that costs $39.30.

Is it expensive to run an oil-filled radiator in Arizona?

Arizona has the 19th-cheapest residential electricity of the 50 states and DC at 15.4¢/kWh — cheaper than most. Running an oil-filled radiator here costs about $472 a year at typical use, compared with $561 at the national average rate.

What is the electricity rate in Arizona right now?

The average residential electricity rate in Arizona was 15.4¢ per kWh in July 2026, according to the latest EIA data — up 0.3% from a year earlier.

Are oil-filled heaters cheaper to run than fan heaters?

Per watt, no — both convert electricity to heat at about 100%. In practice an oil-filled radiator often uses a little less because its thermostat cycles off for longer once the oil is hot.

Oil-Filled Radiator costs in nearby states

Cheapest and priciest states

Comparisons

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