Top 5 Heat Pump Water Heater Suppliers in the USA: Your Comprehensive Sourcing Guide

The United States heat pump water heater (HPWH) market is experiencing unprecedented growth. The North America HPWH market generated revenue of USD 1.07 billion in 2025 and is expected to grow at a CAGR of 14.6% from 2026 to 2033. Policy drivers, including the U.S. Department of Energy’ s April 2024 final efficiency rule for water heaters (with compliance in May 2029) and federal tax credits covering 30% of installed costs up to $2,000, are accelerating adoption across residential and commercial segments.

For sourcing professionals, contractors, and project developers working in the U.S. market, selecting the right supplier requires a clear understanding of each manufacturer’ s core strengths and product offerings. This guide profiles five leading suppliers shaping the American heat pump water heater landscape.

1. SST Heating Energy Co., Ltd.: The Storage Tank Specialist

SST Heating Energy Co., Ltd. has dedicated more than twenty years exclusively to the research, development, and manufacturing of stainless steel water tanks optimized for heat pump applications. Founded in 2006 and headquartered in Guangzhou, China, the company has grown into one of China’ s largest exporters of customized thermal storage solutions, with approximately 90% of its annual output shipped to over 53 countries worldwide.

Core Expertise: Thermal Storage Engineering

SST’ s unique position in the heat pump ecosystem lies in its specialized focus on thermal storage. The company’ s engineering philosophy recognizes that even the most advanced heat pump can only perform as reliably and efficiently as the tank it partners with. With over 50 invention and utility model patents, SST has developed mature manufacturing technology for stainless steel water tanks.

Duplex 2205 Stainless Steel Technology

SST’ s use of Duplex 2205 stainless steel represents a significant advancement in tank material technology. This material delivers:

Superior corrosion resistance: Far exceeding conventional 304 and 316L grades in critical pitting corrosion temperature testing.

Exceptional mechanical strength: Tensile strength reaching 655 MPa allows optimized wall thickness without compromising structural integrity.

Extended service life: The combination of enhanced corrosion resistance and strength translates to tanks that reliably outlast standard alternatives.

Manufacturing Scale and International Compliance

SST operates a 30,000-square-meter production facility housing three workshops and six dedicated assembly lines, with total annual output exceeding 635,000 units. The product range includes heat pump water tanks, buffer tanks, electric water tanks, pressure solar water tanks, and gas boiler tanks. Each unit undergoes 100% leakage testing, infrared thermal imaging for insulation verification, and salt spray corrosion testing.

Why SST for the U.S. Market:

For American specifiers and contractors, SST offers a critical value proposition: the ability to source high-durability stainless steel storage tanks that complement any major heat pump brand, with manufacturing capabilities that meet U.S. quality expectations and export documentation requirements.

2. Rheem Manufacturing Company: The U.S. Market Leader

Rheem Manufacturing Company, founded in 1925, currently holds the largest HPWH market share in the United States, benefiting from strong partnerships with major retailers including Home Depot and Clayton Homes. The American water heater market is dominated by three companies—Rheem, A. O. Smith, and Bradford White—and Rheem leads the segment with the broadest product range and strongest market presence.

ProTerra Series Fifth Generation

Rheem recently released the fifth generation of its ProTerra model (ProTerra 5.2) with several notable improvements:

Peak efficiency: Achieving a 4.07 Uniform Energy Factor (UEF), meaning the unit produces over four units of hot water energy for every unit of electricity consumed. Crossing the UEF 4 threshold represents a significant efficiency milestone for residential HPWHs.

Quiet operation: Sound levels reduced to 45 dB, equivalent to a whisper, with the only audible sound being the water heater fan.

Simplified installation: Top water connections rather than side connections make retrofitting much easier, as many existing water heaters connect to pipes on the top.

Duct-ready design: Eliminates the need for a separate ducting adapter when installing in confined spaces.

LeakGuard automatic shutoff: An industry-exclusive safety feature that no competitor matches.

Why Choose Rheem:

Rheem is the ideal partner for residential projects requiring the broadest product selection, strong retail availability, and smart home connectivity features.

 3. A. O. Smith Corporation: The Water Heating Heritage Brand

 A. O. Smith Corporation, founded in 1874 and headquartered in Milwaukee, Wisconsin, has over 150 years of proven success in water heating and holds the largest market share in the broader North America residential water heater market (over 35% in 2024). The company is recognized alongside Rheem and Bradford White as one of the three dominant players in the American water heater industry.

Product Innovation

A. O. Smith pioneered residential heat pump water heaters and offers the Voltex AL at 4.02 UEF with strong commercial-grade construction. The company’s Emerge®-i Commercial Heat Pump Water Heater was recognized as a 2025 Top 75 Building Product for its innovative features and superior functionality.

Connectivity Platform

The iCOMM connectivity platform enables remote monitoring and control, providing commercial building managers with real-time performance data and maintenance alerts.

Why Choose A. O. Smith:

A. O. Smith is the preferred choice for projects that value over a century of American manufacturing heritage, commercial-grade durability, and applications in hard water regions.

4. Bradford White Corporation: The Efficiency Champion

Bradford White Corporation, an industry-leading manufacturer of water heaters, boilers, and storage tanks, holds a position among the top three players in the American residential water heater market. The company’ s AeroTherm G2 series represents the current efficiency benchmark for residential HPWHs.

AeroTherm G2: Best-in-Class Efficiency

Released in 2025, the AeroTherm G2 series comprises three models with capacities of 50, 65, and 80 gallons, corresponding to approximately 189L, 246L, and 303L:

Peak efficiency: The 65-gallon model achieves a best-in-class 4.20 UEF—the highest heat pump efficiency rating currently available in the residential segment.

Five operational modes: Users can switch between heat pump only (maximum efficiency), electric only, hybrid standard, hybrid plus (maximum recovery), and vacation mode.

Annual savings: Estimated savings of 300 to 600 annually on electricity bills, depending on the model.

Professional distribution: Sold exclusively through professional installers, not big box stores, ensuring qualified installation.

Why Choose Bradford White:

Bradford White is the ideal choice for homeowners and contractors seeking the highest possible efficiency rating and professional-grade support.

5. Carrier Global Corporation: The HVAC Industry Giant

Carrier Global Corporation, spun out of United Technologies in 2020, has emerged as one of the world’s leading manufacturers of commercial and residential HVAC systems and a major player in the heat pump water heater space. With a market capitalization of over $51 billion, Carrier brings immense scale, engineering resources, and a vast authorized dealer network spanning the entire United States to the HPWH market.

InteliSense Technology and Smart Integration

Carrier is at the forefront of connected HVAC solutions. Many of the company’ s systems feature InteliSense technology, which gives your dealer the ability to remotely view the operational health of your system and use digital tools to provide more efficient customer service and remote troubleshooting. This capability, combined with compatibility with ecobee for Carrier Smart Thermostats and patent-pending ComfortAdjust technology, enables homeowners to fine-tune energy use and maximize comfort from anywhere. As Carrier demonstrated at the 2026 International Builders’ Show, the company is designing its systems for the future of electrification and sustainability, with features like over-the-air updates and adaptive controls.

Global Scale, Local Support

Following its strategic acquisition of Viessmann Climate Solutions in 2024—focusing on heat pumps, boilers, and solar PV equipment—Carrier has significantly expanded its European footprint and enhanced its heat pump technology portfolio. In the United States, Carrier supports its products through a network of thousands of factory-authorized dealers, ensuring that parts, service, and technical expertise are available nationwide.

Why Choose Carrier:

Carrier is the ideal choice for projects requiring the engineering depth and service infrastructure of a top-tier global HVAC manufacturer. Their all-in-one system design reduces contractor installation time, while their InteliSense remote diagnostics capability provides ongoing peace of mind for building owners.

Conclusion

The U.S. heat pump water heater market offers diverse options from established manufacturers. Rheem leads with the broadest product range and strongest retail presence, A. O. Smith brings over 150 years of heritage and commercial-grade durability, Bradford White delivers the highest available efficiency ratings, and Carrier brings the engineering scale and smart technology of a global HVAC leader to the HPWH segment.

For projects requiring specialized stainless steel thermal storage that complements any major heat pump brand, SST Heating Energy’ s expertise in Duplex 2205 material science and international quality standards provides a reliable sourcing option. Whether you are a contractor, distributor, or project developer, selecting the right supplier depends on your specific application, efficiency targets, and installation requirements.

Ready to specify the ideal thermal storage solution for your U.S. heat pump project? Explore SST’ s product range and request a consultation with our export team.