Industry Overview

US tankless water heater market was valued at $1.4 billion in 2025 and is projected to reach $2.7 billion by 2035, growing at a CAGR of 6.3% from 2026 to 2035. The U.S. tankless water heater market continues to expand, supported by rising investments in residential renovation projects and the replacement of aging water heating infrastructure. Consumers are increasingly seeking compact systems that optimize indoor space while delivering reliable hot water performance. Growth is also being influenced by advancements in digital controls, remote monitoring capabilities, and enhanced installation flexibility. The increasing preference for modern building designs has encouraged the adoption of equipment that aligns with contemporary housing requirements. In addition, ongoing product innovation and wider availability through established distribution networks are strengthening market penetration across both urban and suburban areas. These factors collectively contribute to the sustained development of the market throughout the country.

Market Dynamics

Growing Preference for Connected Water Heating Systems

The U.S. tankless water heater market is experiencing a notable shift toward digitally enabled products equipped with advanced monitoring and control features. Manufacturers are integrating mobile connectivity, diagnostic tools, and user-friendly interfaces to improve system management and maintenance. These capabilities allow homeowners and facility operators to monitor performance more effectively and respond quickly to operational issues. The trend is particularly evident in newly constructed residential properties and premium renovation projects. Product differentiation through intelligent functionality has become an important competitive factor across the market. As a result, connected technologies are increasingly influencing purchasing decisions.

Expansion of Replacement and Retrofit Installations

A growing share of market demand is being generated by the replacement of conventional water heating systems in existing buildings. Property owners are seeking modern alternatives that can be integrated into available space with minimal structural modifications. This trend is supported by ongoing renovation activities across residential and light commercial sectors. Manufacturers are introducing flexible installation configurations to address diverse retrofit requirements. Distribution networks and professional installer partnerships are also expanding to support replacement projects efficiently. Consequently, retrofit applications continue to represent a significant source of market growth in the United States.

Market Segmentation

• Based on the product type, the market is segmented into condensing tankless water heaters and non-condensing tankless water heaters.
• Based on the technology, the market is segmented into electronic ignition and hydro-ignition.
• Based on the end-user, the market is segmented into households, commercial enterprises, and industrial operators.

Condensing Tankless Water Heaters to Lead the Market with the Largest Share

Condensing tankless water heaters are gaining wider acceptance as property owners increasingly prioritize advanced heating systems with improved thermal utilization. Growth in this segment is supported by ongoing upgrades in residential and commercial buildings where long-term operating performance is a key consideration. Manufacturers such as A.O. Smith, Rinnai, and Navien continue to strengthen their portfolios through enhanced product designs and expanded model offerings. Recent developments have focused on compact configurations, simplified installation requirements, and improved control features. The segment is also benefiting from greater awareness of modern water heating technologies among consumers and contractors. These factors are contributing to sustained demand across multiple application areas.

Commercial Enterprises: A Key Segment in Market Growth

Commercial enterprises represent a significant application area due to the continuous need for dependable hot water supply across hospitality, healthcare, retail, and office facilities. Market expansion is being supported by investments in building modernization and the development of new commercial infrastructure. Industry participants, including Rheem, Noritz, and Bosch, are introducing solutions tailored to varying operational requirements and usage patterns. Recent trends indicate growing interest in scalable systems that can accommodate fluctuating demand levels within commercial properties. Service providers are also expanding installation and maintenance capabilities to support this customer base. As a result, commercial enterprises continue to offer attractive growth opportunities within the market.

Market Players Outlook

The major companies operating in the US tankless water heater market include A. O. Smith Corporation, Rheem Manufacturing Company, Rinnai Corporation, Ariston Holding N.V., and NIBE Industrier AB, among others. Market players are leveraging partnerships, collaborations, mergers, and acquisition strategies for business expansion and innovative product development to maintain their market positioning.

Recent Development

• In June 2025, Navien began shipping its NWP500 Series water heating solution across North America, strengthening its residential water heating portfolio. The launch reflects the company's continued investment in advanced water heating technologies and expands its offering for U.S. customers.

• In January 2024, A. O. Smith Corporation launched the Adapt Premium Condensing Gas Tankless Water Heater line in the U.S. The product range includes integrated recirculation technology, scale reduction features, flexible venting options, and indoor/outdoor installation capability, expanding the company's premium tankless water heater portfolio in the U.S. market.

The Report Covers

• Market value data analysis for 2025 and forecast to 2035.
• Annualized market revenues ($ million) for each market segment.
• US-wise analysis of major geographical regions.
• Key companies operating in the US tankless water heater market. Based on the availability of data, information related to new products and relevant news is also available in the report.
• Analysis of business strategies by identifying the key market segments positioned for strong growth in the future.
• Analysis of market-entry and market expansion strategies.
• Competitive strategies by identifying ‘who-stands-where’ in the market.