Combi Boiler Global Market Report 2025

The combi boiler market size has grown strongly in recent years. It will grow from $30.65 billion in 2024 to $33.3 billion in 2025 at a compound annual growth rate (CAGR) of 8.6%. The growth observed during the historical period can be attributed to the rising adoption of gas-based heating in residential buildings, increased urbanization and demand for compact housing, growing replacement of conventional boilers, heightened awareness of carbon emissions and green technologies, expanding government incentives for energy-efficient appliances, and the rise in construction of new residential units.

The combi boiler market size is expected to see strong growth in the next few years. It will grow to $47.75 billion in 2029 at a compound annual growth rate (CAGR) of 8.3%. The projected growth in the forecast period is driven by increasing fuel costs fueling demand for efficient heating systems, a growing need for space-saving heating solutions, wider availability of advanced smart heating controls, continued replacement of conventional boilers, rising popularity of hydrogen-ready and low-emission boilers, and increased demand in colder climate regions for dependable heating solutions. Major trends anticipated in the forecast period include advancements in condensing technology for improved efficiency, development of advanced control systems with AI-based optimization, innovations in hydrogen-ready boiler designs, integration of smart thermostats and home automation, and innovations in compact and modular boiler designs.

The increasing demand for energy-efficient heating systems is expected to drive the growth of the combi boiler market in the coming years. Energy-efficient heating systems are designed to use less energy while providing equal or improved warmth. The rise in demand is motivated by the need to reduce energy costs through lower power consumption and decreased utility bills. Combi boiler systems utilize energy-efficient heating technologies to minimize fuel usage, reduce operating expenses, and deliver consistent heating with minimal environmental impact. This makes them a cost-effective and environmentally friendly choice for modern homes. For example, in September 2024, according to ElectricHomes, a UK-based information and media organization, 36,799 air source and 2,469 ground or water source heat pumps were installed in 2023, bringing the total number of Microgeneration Certification Scheme (MCS) certified units to 229,6188, representing a 20% increase from 2022. The UK aims to reach 600,000 installations annually by 2028. Thus, the rising demand for energy-efficient heating systems is boosting the combi boiler market.

The growth in residential construction and renovation activities is expected to propel the combi boiler market forward. Residential construction and renovation involve building new homes or upgrading existing ones to improve usability, aesthetics, or energy efficiency. The increase in these activities is driven by a rising demand for modern, energy-efficient living spaces, as homeowners seek to lower energy costs, enhance comfort, and comply with stricter environmental regulations. Combi boilers offer efficient, compact heating and hot water solutions, making them a favored option for both new residential projects and renovations. Their space-saving design and affordability appeal to homeowners and builders alike. For instance, in May 2025, according to the United States Census Bureau, a US-based government agency, privately owned housing starts reached a seasonally adjusted annual rate of 1,361,000 in April, reflecting a 1.6% rise (±11.8%) compared to the revised figure for March of 1,339,000. Additionally, in January 2023, the Harvard Joint Center for Housing Studies (JCHS), a US research center focused on housing issues, reported that national spending on remodeling and repairs for owner-occupied homes reached $485 billion in 2023, marking a 2.6% increase from the previous year. Therefore, increasing residential construction and renovation activities are driving growth in the combi boiler market.

Key players in the combi boiler market are developing advanced products, such as high-performance combi boilers, to meet the rising consumer demand for sustainable heating solutions. High-performance combi boilers are state-of-the-art heating units that provide instant hot water and central heating with maximum energy efficiency, delivering faster heating and better fuel savings compared to traditional boilers. For example, in February 2025, Viessmann Climate Solutions, a UK-based heating and refrigeration manufacturer, launched the Vitodens 025-W, a new compact combi boiler designed to provide efficient, quiet heating for homes with limited space. Featuring advanced components such as a durable Inox-Radial stainless steel heat exchanger, a high-efficiency MatriX-Plus burner, and a compact, quiet design, it achieves up to 98% seasonal efficiency (ERP Class A) and is simple to install and operate, all offered at an attractive price point.

Major players in the combi boiler market are Rheem Manufacturing Company, Viessmann Werke GmbH And Co. KG, Vaillant Group, Rinnai Corporation, Ariston Group, Noritz Corporation, Saunier Duval, Baxi Heating UK Limited, Bradford White Corporation, Hoval Ltd., Worcester Bosch Group, Ferroli S.p.A., Ideal Heating, Intergas Heating Ltd., Alpha Heating Innovation, Grant Engineering (UK) Ltd., ATAG Heating Technology UK Ltd., Glow-worm, Mistral Boilers Ltd., KD Navien Co. Ltd.

North America was the largest region in the combi boiler market in 2024. Asia-Pacific is expected to be the fastest-growing region in the forecast period. The regions covered in combi boiler report are Asia-Pacific, Western Europe, Eastern Europe, North America, South America, Middle East and Africa.

The countries covered in the combi boiler market report are Australia, Brazil, China, France, Germany, India, Indonesia, Japan, Russia, South Korea, UK, USA, Canada, Italy, Spain.

A combi boiler, or combination boiler, is a compact and energy-efficient unit that provides both central heating and instant hot water without requiring a separate water tank or cylinder. It draws water directly from the mains, supplying hot water on demand. This space-saving option is ideal for smaller homes or apartments and is known for its straightforward installation and lower energy consumption. Combi boilers are especially suitable for households with limited space and moderate hot water needs.

The primary fuel types for combi boilers include natural gas, oil, electricity, and others. Natural gas combi boilers deliver efficient, low-emission heating and hot water, making them a cost-effective option in regions with established gas infrastructure. They employ various technologies, such as condensing and non-condensing systems, and come with different power ratings, including 24 kilowatts (kW) or less, 25-30 kW, 31-35 kW, and 36 kW or higher. These boilers are distributed through multiple channels, including online retail, physical stores, distributors and dealers, and direct sales, serving a range of end users in both residential and non-residential sectors.

The combi boiler market research report is one of a series of new reports that provides combi boiler market statistics, including the combi boiler industry global market size, regional shares, competitors with the combi boiler market share, detailed combi boiler market segments, market trends, opportunities, and any further data you may need to thrive in the combi boiler industry. This combi boiler market research report delivers a complete perspective of everything you need, with an in-depth analysis of the current and future scenarios of the industry.

The combi boiler market consists of sales of lpg-powered combi boiler, hydrogen-ready combi boiler, condensing combi boiler, smart combi boiler, dual-fuel combi boiler and biomass combi boiler. Values in this market are ‘factory gate’ values, that is, the value of goods sold by the manufacturers or creators of the goods, whether to other entities (including downstream manufacturers, wholesalers, distributors, and retailers) or directly to end customers. The value of goods in this market includes related services sold by the creators of the goods.

The market value is defined as the revenues that enterprises gain from the sale of goods and/or services within the specified market and geography through sales, grants, or donations in terms of the currency (in USD unless otherwise specified).

The revenues for a specified geography are consumption values and are revenues generated by organizations in the specified geography within the market, irrespective of where they are produced. It does not include revenues from resales along the supply chain, either further along the supply chain or as part of other products.

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