The Windmill AC Lite review

The Lite is Windmill's lower-cost window unit, a 6,000 BTU model for small to medium rooms of 150 to 250 sq ft. At $249 on Windmill's store, it is the cheapest unit on this list. It keeps the pre-assembled install kit that sets Windmill apart, so it slides into place without building the side panels yourself, and it connects to the same Windmill app as the main line for temperature changes, schedules and usage tracking. Modes are cooling, fan and eco, with low, medium and high fan speeds, an auto-fade display and soft-touch buttons. It uses R32 refrigerant, draws 550 watts at 6.8 amps, and weighs 40.2 lbs at 16 by 12 by 13.6 inches, the lightest unit here. The compromises show in the specs: a CEER of 11.0, below the up to 15.0 Windmill quotes for its main AC line, no published noise figure and a ceiling of 250 sq ft.

Who it is for

small rooms on the tightest budget

Price

$249 on Windmill's store.

6K Lite $249 Add to cart
Quoted from the vendor pricing page on November 14, 2026.

Key features

• 6,000 BTU for rooms of 150 to 250 sq ft
• Pre-assembled install kit
• Windmill app for temperature, schedules and usage
• Cooling, fan and eco modes with three fan speeds
• Auto-fade display and soft-touch controls

Strengths and weaknesses

• Strength: Cheapest unit on this list at $249
• Strength: Lightest unit here at 40.2 lbs
• Strength: Draws 550 W at 6.8 A
• Weakness: CEER of 11.0, lower than the up to 15.0 Windmill quotes for its main line
• Weakness: Room size tops out at 250 sq ft
• Weakness: Windmill publishes no dB figure for the Lite

Key facts

• Cooling: 6,000 BTU
• Room size: 150 to 250 sq ft
• Efficiency: CEER 11.0
• Power: 115 V, 550 W, 6.8 A
• Size and weight: 16 W x 12 H x 13.6 D in, 40.2 lbs

Where it ranks

The Windmill AC Lite is No. 8 in our Best Window Air Conditioners verdict.