The 670 W value is from the Frigidaire product support page, retrieved September 8, 2026. The eight-hour schedule is a chosen scenario. Confirm the wattage and voltage for your model before using it.
Calculate from the rated input
Monthly kWh = cooling watts ÷ 1,000 × scheduled hours per day × active days per month × duty cycle ÷ 100.
At 100% duty, 670 ÷ 1,000 × 8 × 30 = 160.8 kWh. At $0.1834/kWh, 160.8 × 0.1834 = $29.49072, displayed as $29.49.
The duty input represents the share of scheduled time at the stated cooling input. A thermostat may stop the compressor while controls or a fan remain active. Enter 100% when you use a measured average watt value over the complete observation period. Do not apply a guessed duty percentage to a kWh reading that already includes cycling.
Compare a schedule and a rate
The table holds the model's 670 W, 30 days and the EIA benchmark. Hours are chosen scenarios.
| Hours/day | Monthly kWh at 100% duty | Cost at $0.1834/kWh |
|---|---|---|
| 2 | 40.2 | $7.37 |
| 4 | 80.4 | $14.75 |
| 8 | 160.8 | $29.49 |
| 12 | 241.2 | $44.24 |
At a chosen $0.25/kWh price, the eight-hour scenario is $40.20. The 160.8 kWh does not change. This is why the rate on your bill matters more than a national benchmark when you are checking a particular month.
BTU is capacity, watts is input
BTU per hour describes cooling capacity. Watts describe electrical input. They are related through efficiency, so do not convert a BTU label to watts by using a single universal multiplier. Use the electrical input or measured kWh shown by the manufacturer and your meter.
The product page's 670 W is a model-specific cooling value. It is not a wattage for every 8,000 BTU unit. Features, voltage, controls and test conditions can differ. If the label shows amps and volts but no watts, a qualified person can help interpret it safely. Do not open the unit.
Check installation and operation safely
Follow the manufacturer's installation instructions and keep the unit supported as specified. This guide does not provide mounting or electrical instructions. A circuit, outlet or cord that feels hot needs attention from a licensed electrician.
Clean and airflow conditions can change runtime. Record filter cleaning, outdoor temperature and the thermostat setting in your notes. These observations help explain a meter result without assigning an invented percentage to weather or insulation.
Use a meter for a real comparison
If a suitable energy monitor records 5.4 kWh over 12 hours, that is 0.45 kWh per hour for that observation. Extending it across a chosen 30-day schedule gives 324 kWh if used 24 hours each day, or a different amount for your actual schedule. State the exact observation period and do not present the extrapolation as a manufacturer rating.
The estimate excludes fixed charges, taxes, demand charges, time-of-use rates and the cost of heating removed from the room. It does not compare a window unit with central air. Use the electricity-rate guide for tariff details, the appliance measurement guide for meter readings and the EnergyGuide guide for label context.
Enter the model's watts and your schedule in the appliance running-cost calculator. Its output is a planning estimate for the stated input, not a guarantee of your next bill.
Keep an observation log
Record the model, rated input, thermostat setting, outdoor conditions, filter state and the exact start and end times of a meter observation. Note whether the compressor or fan cycles. These details help explain a difference between the rated-input scenario and a measured kWh result.
For a comparison, change one input at a time. Hold the rate and billing days constant while testing hours, then hold the schedule constant while testing a different tariff. A window unit can draw a different average during a mild period than during a hot period, so label an extrapolation as a scenario. Follow the product manual and ask a licensed electrician about any outlet, cord or circuit concern.