Finding an air conditioner that delivers effective cooling while consuming low electricity is essential for energy-conscious consumers. This article reviews the best low electricity air conditioners available on Amazon, suitable for various room sizes and cooling needs. Below is a summary table of the selected products highlighting their cooling capacity, key features, and ideal room sizes.
Product | Cooling Capacity (BTU) | Ideal Room Size | Type | Noise Level |
---|---|---|---|---|
GE Window Air Conditioner, 5,000 BTU | 5,000 | Up to 150 sq ft | Window | Low-No Noise |
KoolSiln 12,000 BTU Portable AC | 12,000 | Up to 550 sq ft | Portable | 44 dB |
LG 6,000 BTU Window Air Conditioner | 6,000 | Up to 250 sq ft | Window | 52 dB |
LG 10,000 BTU Smart Window Air Conditioner | 10,000 | Up to 450 sq ft | Window | 44 dB |
kopado Mini Portable Air Conditioner | N/A (Evaporative Cooler) | Small Spaces | Portable | Ultra-Quiet |
GE Window Air Conditioner Unit 5,000 BTU

The GE 5,000 BTU Window Air Conditioner is designed for small rooms up to 150 sq ft, such as bedrooms or home offices. It comes with an easy install kit for quick setup. This unit is ideal for those looking for efficient cooling with low noise for nighttime use. Its mechanical controls allow manual adjustment of fan speed and cooling settings, providing custom comfort with minimal electricity consumption. The compact design fits most windows, making it a convenient option for smaller living spaces.
KoolSiln 12,000 BTU Portable Air Conditioner

This KoolSiln Portable AC offers 12,000 BTU cooling and can cover rooms up to 550 sq ft. It features an enlarged 77° air outlet for fast cooling and an 8-hour sleep timer for convenience. The innovative 360° auto-evaporation technology recycles moisture, so you avoid water messes. The unit operates at just 44dB, making it suitable for light sleepers or office environments. Its portability and remote control add to ease of use, making it a strong candidate for energy-efficient cooling in larger rooms without complex installation.
LG 6,000 BTU Window Air Conditioner with Remote

The LG 6,000 BTU Window Air Conditioner is perfect for rooms up to 250 sq ft. It delivers quiet performance at approximately 52dB and offers 2 cooling and fan speeds for customization. Features include a digital control panel, remote control, and 2-way air deflection for improved airflow direction. The filter light reminder and slide-out, washable filter support maintenance. Auto restart allows the unit to resume operation after power interruptions, promoting consistent comfort while keeping electricity usage in check.
LG 10,000 BTU Smart Window Air Conditioner

Equipped with revolutionary DUAL Inverter technology, this LG smart air conditioner operates quietly at just 44dB in sleep mode. It cools rooms up to 450 sq ft with 25% better energy efficiency versus Energy Star requirements. The LG ThinQ app provides remote operation and voice control compatibility with Amazon Alexa and Google Assistant. This unit is a strong choice for those wanting smart, energy-efficient cooling with quiet operation and customization options to cut electricity use without sacrificing comfort.
kopado Mini Portable Air Conditioner with Remote

The kopado Mini Portable Air Conditioner functions as a 4-in-1 device: fan, cool mist humidifier, portable air conditioner, and LED lamp. It uses evaporative cooling technology with adjustable wind speeds and mist levels, reducing ambient temperature by up to 40-50°F. The unit is ultra-quiet and safe with no exposed blades, suitable for small rooms or desktop use. Though it’s not a traditional AC and best for supplemental cooling, its portability and low power consumption make it an attractive energy-saving option.
Buying Guide for Low Electricity Air Conditioners
Cooling Capacity (BTU) and Room Size Compatibility
Select an air conditioner with the right BTU rating for your room size. Undersized units won’t cool efficiently, while oversized units waste energy. For example, 5,000 BTU units suit small rooms up to 150 sq ft, while 10,000-12,000 BTU can cover areas around 400-550 sq ft.
Energy Efficiency and Technology
Look for energy-saving features like inverter technology, auto-evaporation, and Energy Star certification. Dual inverter units provide efficient, quiet cooling and reduce electricity consumption significantly.
Noise Level
Low noise operation (measured in decibels) is important for bedrooms or quiet spaces. Models with noise levels between 40-52 dB are ideal for undisturbed cooling and better sleep quality.
Type of Air Conditioner
- Window units: Fixed installation, effective for consistent use, and usually more energy efficient for their capacity.
- Portable units: Flexible placement, no permanent installation but generally less energy efficient and noisier.
- Evaporative coolers: Use water evaporation to cool air; consume less electricity but work best in dry climates and smaller spaces.
Control Features and Convenience
Remote controls, digital panels, and smart app integration improve ease of use and allow temperature and timer settings to optimize energy consumption. Voice control compatibility is an added convenience for smart home setups.
Maintenance and Installation
Consider units with washable filters and included installation kits. Easy maintenance supports efficient operation, while hassle-free installation saves time and effort.
Additional Functionalities
Extras like quiet sleep modes, fan speed options, 2-way air direction, and timers enhance customization and comfort without increasing energy use.