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Heat pump water heaters are gaining attention as a high-efficiency alternative to conventional water heating technologies due to factors including energy efficiency standards, changing consumer preferences, and rebate programs and tax credits offered by utilities and some state and local governments.

By absorbing thermal energy from the surrounding air to heat water, heat pump units can deliver efficient operation and help reduce operating costs compared to traditional electric or gas water heaters. One of the most promising next-generation residential water heating solutions available in the U.S. today is a new inverter model from LG Electronics, built to support efficient operation, consistent performance and smart energy management.

High Efficiency Powered by Dual Inverter Technology

At the core of the LG Inverter Heat Pump Water Heater is the company's Dual Inverter technology. Unlike conventional heat pump systems which typically use a single-cylinder compressor operating in simple on/off cycles, LG's solution applies a DUAL Inverter Compressor™ with dual cylinders supporting variable-speed operation and helping expand the operating range and improve energy efficiency under typical conditions. The LG Inverter Heat Pump Water Heater has earned both AHRI Performance Award certification and ENERGY STAR^® certification for energy efficiency.

Courtesy of LG Electronics

Along with supporting reliable hot water availability, the LG Inverter Heat Pump Water Heater achieves a Uniform Energy Factor (UEF) of up to 4.20¹, enabling estimated annual energy costs as low as $165² — compared to approximately $747³ for conventional electric water heaters — representing savings of up to 78 percent, based on standardized test conditions and energy cost assumptions. And the system offers strong First Hour Rating (FHR) performance relative to its storage capacity. For example, LG's 58-gallon model delivers up to 81 gallons⁴ on Au to mode of hot water in the first hour, comparable to or exceeding larger-capacity conventional systems.

In addition, the system's DUAL Inverter Compressor works with a BLDC motor to help reduce vibration and noise. This allows the unit to operate at just 42 dB(A) in Auto Mode, minimizing disturbance and creating a more comfortable home environment.

Smart Management and Safety with LG ThinQ™

LG's Inverter Heat Pump Water Heater incorporates a range of smart capabilities, accessible through the LG ThinQ™ app. Users can remotely monitor the system, adjust water temperature (95–140 degrees Fahrenheit) in real time, and schedule operating times to fit their lifestyle and daily routine.

Courtesy of LG Electronics

The product also supports Demand Response (DR) functionality, with select models featuring built-in EcoPort™ (CTA-2045 Port) for grid management. This makes it possible for the system to receive and respond to signals from utility providers and intelligently optimize energy usage according to grid demand. The Time of Use (TOU) function further enhances savings by heating and storing water during off-peak hours when electricity rates are lower. For added peace of mind, select models include a water leak detection function that automatically closes the shut-off valve if a water leak occurs, helping to minimize potential water damage.

Refined Design and Flexible Installation

LG's new water heater has also been designed to better integrate into residential environments through improved design and installation flexibility. The updated model introduces a black stainless steel exterior finish, replacing the previous Luxury Silver color, to provide a more modern and refined appearance. Together with LG's signature square design, the product offers a clean and contemporary look that blends naturally with a variety of home interiors.

For convenient installation, the inlet and outlet pipe connections have been repositioned — allowing the pipes to be connected vertically without overlapping. This updated layout helps reduce piping interference and simplifies the installation process for contractors. Boasting a refined design and installation flexibility, the unit fits seamlessly in various residential spaces, such as garages, basements, laundry rooms and utility areas.

EDITOR'S NOTE: Specifications referenced in this article are based on LG's 58-gallon Inverter Heat Pump Water Heater models. Product features, certification and performance may vary by model and application and are subject to change. Performance may vary depending on installation, application, climate conditions and maintenance.

1. Based on LG 58 gal model (APHWC501M).
2. Based on values of Energy Guide label for 58gal model.
3. Based on same annual hot water demand (116.9 MMBTU) with LG heat pump water heater and electric cost is assumed as $0.14 per kWh.
4. First Hour Rating (FHR) for LG 58-gallon in Auto mode (Certified by Intertek US).