The Global Indoor Heating Systems Market was valued at USD 45.2 Billion in 2025 and is projected to reach USD 66.8 Billion by 2034, growing at a Compound Annual Growth Rate (CAGR) of 4.5% during the forecast period (2024–2034). This growth is being driven by increasing demand for energy-efficient solutions, stricter government regulations on building emissions, and the accelerating construction activity in both residential and commercial sectors.

As the world moves towards more sustainable and intelligent building management, the focus intensifies on the key manufacturers and solution providers driving innovation, efficiency, and smarter climate control. In this blog, we profile the Top 10 Companies in the Indoor Heating Systems Industry—a mix of established HVAC giants, hydronic specialists, and smart technology innovators shaping the future of thermal comfort.

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🔟 1. Resideo Technologies Inc.

Headquarters: Scottsdale, Arizona, USA
Key Offering: Smart Thermostats, HVAC Controls, Zone Control Systems

Resideo Technologies is a leading global provider of critical comfort and energy management solutions for residential and commercial customers. Formed as a spin-off from Honeywell Home, the company leverages a strong legacy in HVAC controls and has a significant focus on connected home ecosystems.

Innovation & Sustainability Focus:

• Pioneering smart thermostat technology with brands like Honeywell Home

• Integration with broader home automation and security platforms

• Focus on products that enhance energy savings and reduce carbon footprints

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9️⃣ 2. Uponor Corporation

Headquarters: Vantaa, Finland
Key Offering: PEX Piping Systems, Underfloor Heating, Radiant Cooling

Uponor is a global leader in sustainable drinking water delivery and climate solutions, with a particularly strong position in hydronic-based indoor heating. The company’s robust PEX piping systems form the backbone of efficient radiant floor heating and cooling installations worldwide.

Innovation & Sustainability Focus:

• Expertise in low-temperature heating systems compatible with heat pumps

• Commitment to developing sustainable building solutions and circular economy principles

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8️⃣ 3. Danfoss A/S

Headquarters: Nordborg, Denmark
Key Offering: Radiator Thermostats, Heating Controls, District Energy Components

Danfoss is a renowned engineering company that plays a critical role in optimizing heating systems through its advanced controls and components. Its radiator thermostats and balancing solutions are fundamental to achieving energy efficiency in millions of buildings globally.

Innovation & Sustainability Focus:

• Development of intelligent controls for optimal heat distribution and savings

• Strong focus on enabling the transition to 4th and 5th generation district heating networks

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7️⃣ 4. Daikin Industries, Ltd.

Headquarters: Osaka, Japan
Key Offering: Air-to-Water Heat Pumps, VRV Systems, HVAC Units

Daikin is a world leader in HVAC technology, with a rapidly expanding portfolio of heating solutions centered around its highly efficient air-to-water heat pumps. These systems are pivotal for the electrification and decarbonization of residential and commercial heating.

Innovation & Sustainability Focus:

• Leadership in inverter-driven heat pump technology for superior efficiency

• Development of low-GWP (Global Warming Potential) refrigerants

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6️⃣ 5. nVent Electric plc

Headquarters: London, United Kingdom
Key Offering: Electric Underfloor Heating, Trace Heating, Thermal Management

nVent specializes in electrical connection and protection solutions, with a significant presence in the electric heating market through its nVent RAYCHEM and nVent NUHEAT brands. The company provides reliable electric underfloor heating systems ideal for retrofits and new builds.

Innovation & Sustainability Focus:

• Smart electric floor heating solutions with Wi-Fi controls

• Focus on providing safe, efficient, and easily installable heating products

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5️⃣ 6. Rehau Group

Headquarters: Rehau, Germany
Key Offering: Polymer-based Piping, Underfloor Heating, Surface Cooling

Rehau is a leading polymer processor that supplies high-quality piping systems for radiant heating and cooling applications. The company’s solutions are known for their durability, efficiency, and contribution to creating comfortable indoor environments.

Innovation & Sustainability Focus:

• Development of energy-efficient building envelope and HVAC solutions

• Strong commitment to sustainability across its product lifecycle

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4️⃣ 7. Emerson Electric Co.

Headquarters: St. Louis, Missouri, USA
Key Offering: HVACR Controls, Thermostats, White-Rodger Heating Products

Emerson is a global technology and engineering company providing innovative solutions for a wide range of industries. Its impact on the heating market is profound through its sophisticated controls, thermostats, and components that enhance system efficiency and reliability.

Innovation & Sustainability Focus:

• Advanced control systems for optimizing complex HVAC and heating applications

• Focus on technologies that support the adoption of low-carbon heating solutions

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3️⃣ 8. WARMUP INC.

Headquarters: London, UK & Stamford, Connecticut, USA
Key Offering: Electric Underfloor Heating Kits, Smart Thermostats, Heating Mats

WARMUP is a specialist brand dedicated exclusively to underfloor heating systems. It has built a strong reputation by offering a comprehensive range of easy-to-install electric heating solutions directly to consumers and professionals, supported by advanced smart controls.

Innovation & Sustainability Focus:

• Pioneering smart Wi-Fi thermostats with geolocation and learning features

• Focus on making energy-efficient radiant heating accessible for home improvements

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2️⃣ 9. Robert Bosch GmbH

Headquarters: Gerlingen, Germany
Key Offering: Condensing Boilers, Heat Pumps, Smart Thermostats, HVAC Controls

Bosch Thermotechnology is a key division of the Bosch Group and a major European supplier of heating and hot water solutions. The company offers a diverse portfolio, from high-efficiency gas condensing boilers to advanced geothermal and air-source heat pumps.

Innovation & Sustainability Focus:

• Investment in hybrid heating systems that combine boilers with heat pumps

• Commitment to climate-neutral manufacturing and sustainable product development

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1️⃣ 10. Mitsubishi Electric Corporation

Headquarters: Tokyo, Japan
Key Offering: Air-Source Heat Pumps, VRF Systems, HVAC-R Equipment

Mitsubishi Electric is a global powerhouse in advanced electrical and electronic equipment. Its HVAC division is renowned for its hyper-heat pump technology, which provides efficient heating even in extremely cold climates, making it a leader in the electrification of heat.

Innovation & Sustainability Focus:

• Leading R&D in cold-climate air-source heat pumps

• Focus on creating smart, integrated building management systems

Get Full Report Here: Indoor Heating Systems Market – View in Detailed Research Report

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🌍 Outlook: The Future of Indoor Heating Is Intelligent and Sustainable

The indoor heating systems market is undergoing a fundamental transformation. While traditional boilers and furnaces remain prevalent, the industry is rapidly investing in electrified alternatives, smart connectivity, and integrated solutions that prioritize both user comfort and environmental responsibility.

📈 Key Trends Shaping the Market:

• Accelerated adoption of heat pumps driven by decarbonization goals and government incentives

• Deep integration of IoT and AI for predictive heating and energy optimization

• Growth of hybrid systems that combine multiple energy sources for resilience and efficiency

• Strong expansion in the retrofit and renovation market as homeowners seek energy upgrades

Get Full Report Here: Indoor Heating Systems Market – View in Detailed Research Report

The companies listed above are not only providing essential comfort—they’re leading the charge towards a more efficient and sustainable future for indoor environments.

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