Home / Manufacturer Category / Mechanical Equipment / General Machinery

Top 10 Fan Coil Unit Brand & Manufacturers

This section provides a list of the top 10 Fan Coil Unit manufacturers, Website links, company profile, locations is provided for each company. Also provides a detailed product description of the Fan Coil Unit, including product introduction, history, purpose, principle, characteristics, types, usage and purchase precautions, etc.

Manufacturers (Ranking in no particular order)

Shenzhen McQuay Air Conditioning Co., Ltd.
Shenzhen McQuay Air Conditioning Co., Ltd.
Address: No. 10, Fangkeng Road, Pinghu Street, Longgang District, Shenzhen, Guangdong
Company website: http://www.mcquay.com.cn
Company Overview
McQuay is a provider of refrigeration, ventilation, air conditioning, heating and air purification solutions. It originated in 1872 and has built a complete breathing network in the field of construction, providing competitive air and temperature solutions, products and services to customers from all walks of life, and focusing on allowing buildings to breathe freely. At present, McQuay's well-known brands include McQuay, AAF, J&E Hall, etc., with business in more than 100 countries and regions around the world, serving more than one-fifth of the world's population. McQuay China In 1992, McQuay began to enter China, and successively established Shenzhen McQuay Air Conditioning Co., Ltd., McQuay Air Conditioning and Refrigeration (Wuhan), and McQuay Air Conditioning and Refrigeration (Suzhou) Co., Ltd. in 1994, 1996, and 2002, respectively, to provide China with complete localized services. The main products and services cover household, commercial and industrial HVAC equipment, air purification equipment and refrigeration units, such as water-cooled chillers, air-cooled chillers, heat pump hot water units, terminal air-conditioning units, air-cooled multi-split units, water source heat pump units, light commercial air-conditioning units, intelligent air-conditioning control systems, etc. The company is well-known in the industry for providing complete air-conditioning system solutions.
Midea Group Co., Ltd.
Midea Group Co., Ltd.
Address: Floor 26-28, Block B, Midea Headquarters Building, No. 6 Midea Avenue, Beijiao Town, Shunde District, Foshan City, Guangdong Province
Company website: http://www.midea.com
Company Overview
Midea was founded in 1968, with the motto of "Technology is perfect, life is perfect" - Midea is a global technology group covering five major business sectors: smart home, building technology, industrial technology, robotics and automation, and digital innovation. In the past five years, the R&D funds have reached nearly 50 billion yuan, forming a brand portfolio including Midea, Little Swan, Hualing, COLMO, Kuka, Welling, Hekang, Gaochuang, Wandong and Lingwang, providing satisfactory products and services to more than 400 million users, important customers and strategic partners in various fields around the world every year. To date, Midea has about 200 subsidiaries, 35 R&D centers and 35 major production bases around the world, with business covering more than 200 countries and regions. Midea Smart Home, as the operating entity of smart home appliances, smart home and related industries and ecological chains, undertakes the construction of intelligent scenarios for C-end users, user operations and data value exploration, and is committed to becoming a high-tech company that provides the best experience for C-end users. Midea Industrial Technology takes science and technology as its core driving force, integrates the core scientific and technological strengths in four major fields: smart transportation, industrial automation, green energy and consumer appliances, and specializes in the research and development, production and sales of high-precision core components such as compressors, motors, chips, automotive parts, electronic expansion valves, inverters, servos and motion control systems, reducers, heat dissipation components and SVG, etc., to provide green, efficient and intelligent products and technical solutions for global pan-industrial customers, and create a better life for billions of end users. Midea Building Technology, as a leading industrial enterprise that strives to master key core technologies and manufacturing capabilities, is committed to providing energy, HVAC, elevators, control and other products and a full set of solutions and service providers for buildings and public facilities, and actively explores new business models and types. Midea Robotics and Automation mainly focuses on the fields related to future factories, including industrial robots, logistics automation systems and transmission system solutions, medical, entertainment, and new consumer solutions. Midea Digital Innovation is a new business incubated by Midea Group in the transformation of its business model, including software services, unmanned retail solutions and productive services for the digital transformation of enterprises.
Trane Air Conditioning Systems (China) Co., Ltd.
Trane Air Conditioning Systems (China) Co., Ltd.
Address: No. 88, Taicangshi East Road, Suzhou City, Jiangsu Province
Company Overview
Trane was founded in 1885 as a family-owned plumbing business in La Crosse, Wisconsin. Joined by his son Reuben, a mechanical engineer, James Trane developed an innovative low-pressure steam heating system. In 1913, the family incorporated as Trane Company. Over the next hundred years, Trane established itself as a pioneer in temperature control systems. In 1931, the company patented its first air conditioner. Seven years later, Trane released the Turbovac, a new water chiller that revolutionized the industry’s approach to large building air conditioning systems. These early innovations paved the way for Trane’s industry-leading commercial air conditioner, CenTraVac™, the most efficient, low-emission chiller on the market. Throughout the second half of the 20th century, Trane expanded its product offerings to customers. After acquiring Sentinel Electronics in the late 1970s and General Electric’s central air conditioning division in 1982, Trane expanded its residential air conditioning and energy management products. In 1984, American Standard Companies, Inc., acquired Trane and four years later, launched the American Standard Heating & Air Conditioning brand. In 2007, American Standard Companies was spun off and Trane resumed its business and leadership in integrated HVAC services and solutions. Today, Trane maintains a strong global market presence and continues to grow at an accelerated pace. The driving factor behind this growth is the inheritance of the same values that shaped Wisconsin plumbing a hundred years ago. One hundred years after the father and son merged the family plumbing business, Trane continues to move forward steadily. By collaborating with the industry and consumers, we develop game-changing solutions that meet the needs of today's dynamic market. Trane has taken that legacy and built a business on it to make buildings safer, more comfortable and more cost-effective. Now and for generations to come.
Shanghai Xinhuang Air Conditioning Equipment Co., Ltd.
Shanghai Xinhuang Air Conditioning Equipment Co., Ltd.
Address: No. 518, Sanxiang Road, Sijing Town, Songjiang District, Shanghai
Company website: https://sinko.scg.com.cn/
Company Overview
Founded in 1950, Xinhuang, as a manufacturer of commercial air conditioners, has always been moving forward steadily in the industry. For more than 70 years, Xinhuang's products have been widely used in buildings of all ages. Today, the relationship between human life and the global environment is becoming increasingly close. Xinhuang believes that air conditioning should be more friendly to the earth's environment in addition to creating a comfortable life for humans. Therefore, Xinhuang continues to develop energy-saving technologies and energy-saving air-conditioning systems, and designs environmentally friendly air-conditioning products that run through the entire life cycle from production to scrapping. Shanghai Xinhuang Air Conditioning Equipment Co., Ltd. was restructured from Shanghai Xinhuang Air Conditioning Equipment Co., Ltd. (established in 1987). It is a high-tech production-oriented joint-stock enterprise jointly invested and established by Shanghai Construction Group and Japan Xinhuang Industry Co., Ltd. It was officially established on October 18, 2005 with the approval of the Ministry of Commerce of the People's Republic of China and the Shanghai Municipal Government. It has a registered capital of 355 million and specializes in the production of central air-conditioning products. Shanghai Xinhuang and Japan Xinhuang signed a paid technology transfer contract to ensure that the joint venture company continues to obtain various newly developed advanced technologies and air-conditioning product manufacturing processes from Japan, so that the company's technology reaches the international level at the same time. Over the past decades, the company has insisted on combining introduction and digestion, strictly managing product quality while timely introducing and developing products urgently needed in the domestic market, and has achieved good economic and social benefits. The company's production area has reached 60,000 square meters, and its products have also developed from a single fan coil unit to various advanced high-quality air-conditioning units and various air handling equipment with high technological content. In the development history of Xinhuang, the pursuit of quality is constant. While meeting customer needs, we strictly control and produce high-quality customized products. Over the years, Xinhuang's quality has been unanimously recognized by users at home and abroad. Xinhuang will continue to provide "trust and satisfaction" to customers, society, and employees with wisdom, hard work, and rigor.
Carrier Air Conditioning Sales and Service (Shanghai) Co., Ltd.
Carrier Air Conditioning Sales and Service (Shanghai) Co., Ltd.
Address: 6th Floor, Building A, Qiantan World Trade Center (Phase 1), No. 4, Lane 255, Dongyu Road, Pudong New District, Shanghai
Company Overview
Carrier is a global leader in high-tech HVAC and refrigeration solutions. Since its founding in 1902, Carrier's history in the HVAC and refrigeration industry has been one of innovation and commitment to providing comfort and efficiency around the world. As a global provider of high-tech building systems, Carrier has more than 53,000 employees worldwide and operates in more than 160 countries. Innovation has always been a core value for Carrier; through its own research and design centers, Carrier provides customers with high-quality and efficient products and services. Carrier is committed to reducing the greenhouse gas effect of its products through energy efficiency and refrigerant selection. Since 1994, Carrier has led the industry to phase out refrigerants that damage the ozone layer and introduce high-efficiency HVAC and refrigeration systems around the world. At the same time, it has also reduced the environmental impact of product operation. Carrier actively shares its expertise to promote environmental stewardship. Carrier has obtained the USGBC Leadership in Energy and Environmental Design (LEED®) course certification to train employees and customers in sustainable building solutions and is proud to be named a USGBC Education Partner. Carrier University's Institute for Sustainability has trained thousands of professionals in the United States, the Middle East, Europe, Latin America and Asia. Carrier's relationship with China dates back to 1937, when Carrier's air conditioning system was installed in the Bank of China Building. In 1987, Carrier's joint venture in China was officially established. Today, Carrier Air Conditioning has more than 5,000 employees in China, 4 production bases, 2 major R&D centers and more than 70 sales and service offices. Carrier is committed to providing efficient HVAC solutions, whether commercial or light commercial, and providing customized solutions for users in different fields, such as skyscrapers, hotels, airports, subways, entertainment venues, supermarkets, and apartment villas. Carrier's advancement and reliability have been verified by many well-known projects. In the 2008 Beijing Olympics, Carrier Air Conditioning won nearly 70% of the air conditioning projects; Carrier also has a presence in magnificent buildings such as Shanghai Oriental Pearl Tower and Jinmao Tower. In addition to innovative products and comprehensive solutions, Carrier is also involved in promoting the development of the green building industry in China. Carrier is one of the founding members of the China Green Building Council, committed to promoting smarter and more sustainable buildings.
Johnson Controls (China) Investment Co., Ltd.
Johnson Controls (China) Investment Co., Ltd.
Address: Room 1C103, Building 11, No. 518, Fuquan North Road, Changning District, Shanghai
Company website: https://www.york-iwe.com/
Company Overview
York, a global independent professional manufacturer of HVAC and refrigeration equipment, was formally established in York, Pennsylvania, USA in 1874. For more than 130 years, York's production technology and sales service network have been continuously expanded, and now it has hundreds of branches, maintenance stations, production plants and affiliated institutions around the world. York has become an independent manufacturer of HVAC and refrigeration equipment. Today, York is considered a leader in the application of refrigeration technology in the world. In 1994, York was officially listed on Wall Street in the United States, symbolizing York's important position in the world market. At present, York's air-conditioning equipment production bases include China, the United States, the United Kingdom, France, Mexico, Australia, Malaysia, Japan, Italy and Spain. York's products have a wide range of applications and can be mainly divided into three categories: civil, commercial and industrial refrigeration equipment. York's civil equipment provides heaters, small fully enclosed compressors and various window or split air conditioner series for residential buildings. York's commercial equipment includes various large commercial chillers, air handlers and group control equipment. Industrial refrigeration equipment provides a variety of screw compressors, supporting refrigeration systems, cold storage and food freezing equipment, artificial ice and snow sports field equipment, etc. The quality of York equipment has been proven by the trust and selection of major construction projects around the world. Johnson Controls York brand continues to pursue innovation, continuously develops and produces innovative products, and provides excellent technology and solutions to meet customer needs. Johnson Controls Asia Technology Research and Development Center was established in 2004, with a cumulative asset investment of more than 280 million yuan. It currently has more than 60 internationally leading laboratories, such as HALT full life cycle acceleration laboratory, ultra-low temperature laboratory, key component laboratory, etc. The laboratory-related certifications obtained include China National Accreditation Service for Conformity Assessment (CNAS), International Laboratory Accreditation Cooperation Organization Mutual Recognition Agreement (ILAC-MRA), American Refrigeration, Air Conditioning and Heating Association (AHRI) laboratory certification, Intertek certification, etc. The R&D center not only gathers a group of innovative and pioneering R&D engineers, but also adopts advanced product development tools and mature product development processes, and uses advanced testing technologies such as intelligent testing software, big data analysis, and wireless sensors to continuously iterate innovative technologies and optimize product features and functions. In order to better serve the Chinese and Asia-Pacific markets, we focus on global resources and continue to invest in product development in HVAC, building automation and other related fields. Since its establishment, we have obtained 177 patent authorizations. Johnson Controls Asia Technology R&D Center mainly designs and develops commercial air-cooled and water-cooled chillers, heat pumps and heat recovery systems, industrial refrigeration and food refrigeration equipment, commercial and household central air-conditioning units, air terminal treatment equipment, compressors, inverters, heat exchangers, and monitoring equipment and air handling systems for refrigeration units. It also includes Metasys building management systems and comprehensive security solutions.
Nanjing Tianjia Environmental Technology Co., Ltd.
Nanjing Tianjia Environmental Technology Co., Ltd.
Address: No. 6, Hengye Road, Economic and Technological Development Zone, Nanjing, Jiangsu Province
Company website: https://www.tica.com//
Company Overview
Founded in 1991, TICA is a professional company integrating R&D, manufacturing, sales and service in the field of environment and thermal energy utilization. It has five major bases in Nanjing, Tianjin, Guangzhou, Chengdu and Kuala Lumpur, and more than 70 sales and service outlets. TICA's Nanjing headquarters base has also obtained the National 001 Industrial Green Building Three-Star Certification. TICA's distinguished customers include: Zhongnanhai, the Great Hall of the People, Beijing Bird's Nest Stadium, Water Cube, Wukesong Sports Center, PetroChina, Sinopec, State Grid, Nanjing China Power Panda, Hangzhou Xiaoshan Airport, HNA Group, Shangri-La, Manila National Ocean Park, Abu Dhabi Al Muneera, Philippines SM Plaza, Unilever, etc. TICA is an excellent central air-conditioning supplier for Chinese subways. It has successfully served nearly 70 subway lines in many cities such as Hong Kong, Beijing, Shanghai, Guangzhou, Shenzhen, Nanjing, Suzhou, Hangzhou, Wuhan, etc. TICA is a professional clean environment system integration supplier and service provider in China, and in the professional purification fields such as microelectronics industry, hospital operating room, biopharmaceuticals, TICA's market share exceeds 40%. In the field of clean environment, TICA focuses on indoor air quality (IAQ). Its product lines include clean units, fresh air smog removers, clean air handlers, modular units, multi-unit units, screw units, centrifuges, and ORC low-temperature waste heat power generation systems. In terms of international cooperation, TICA established a global strategic joint venture with United Technologies Corporation (UTC) in 2015. TICA centrifuges, water-cooled screw units, and air-cooled screw units are manufactured under the technology license of Carrier, a subsidiary of UTC. At the same time, TICA acquired the Purecycle series ORC low-temperature power generation system of Pratt & Whitney, a subsidiary of UTC, and TICA obtained the Purecycle trademark and more than 100 international patent copyrights. This low-temperature power generation technology can be used in geothermal power generation/six major industrial waste heat power generation/photothermal power generation. As of 2019, hundreds of TICA Purecycle units have been generating electricity normally in projects in the United States, Europe, Japan and other regions. In 2018, TICA acquired SMARDT, the global founder of oil-free chiller (OFC) technology. In 2019, Tianhe Thermal Energy and Golden Eagle International jointly acquired Italy's Exergy, the world's second largest ORC geothermal power generation equipment manufacturer.
Gree Electric Appliances, Inc. of Zhuhai
Gree Electric Appliances, Inc. of Zhuhai
Address: Office 608, No. 108, Huitong 3rd Road, Hengqin New District, Zhuhai City, Guangdong Province
Company website: http://www.gree.com.cn/
Company Overview
Gree Electric Appliances Co., Ltd. of Zhuhai was established in 1991 and listed on the Shenzhen Stock Exchange in November 1996. In its early days, the company mainly relied on the assembly and production of household air conditioners. Now it has developed into a diversified, technology-based global industrial manufacturing group, with industries covering two major fields: household consumer products and industrial equipment, and its products are exported to more than 190 countries and regions.
Qingdao Hisense Hitachi Air Conditioning System Co., Ltd.
Qingdao Hisense Hitachi Air Conditioning System Co., Ltd.
Address: 7th Floor, Building 5, Hisense R&D Center, No. 11, Jiangxi Road, Shinan District, Qingdao City, Shandong Province
Company Overview
Qingdao Hisense Hitachi Air Conditioning System Co., Ltd. was established on January 8, 2003. It is a large-scale joint venture established in Qingdao by Hisense Group and Johnson Controls Hitachi Air Conditioning. It integrates commercial and household central air conditioning system technology development, product manufacturing, marketing and user services. It is Hitachi Air Conditioning's large-scale variable frequency multi-split air conditioning system production base outside Japan. Hitachi Air Conditioning developed the scroll compressor for air conditioning in the 1980s, opening a new chapter in the air conditioning mileage for the world refrigeration industry and becoming one of the leading companies in the industry for variable frequency multi-split air conditioning systems. Hisense and Hitachi are both technology-oriented companies. Hisense's development concept is "innovative technology, a century of trust", and Hitachi's positioning is "future pioneer". Hisense Hitachi, which specializes in central air conditioning systems, is eclectic, using technology to promote product innovation and continuously meet the latest needs of users. Hisense Hitachi has internationally advanced production equipment and quality assurance facilities. On the basis of fully mastering the world's leading core technologies, it continues to launch pioneering new air conditioning products. Adhering to the principle of a high starting point, the company actively promotes a business system of professional technology, professional manufacturing, professional marketing, professional design, professional service and professional management, bringing the world's advanced air-conditioning technology to China, spreading it to the world, leading the continuous progress of China's air-conditioning technology, and creating a better ecological environment for mankind.
Clement Refrigeration Equipment (Shanghai) Co., Ltd.
Clement Refrigeration Equipment (Shanghai) Co., Ltd.
Address: No. 88, Baiyun Road, Spark Development Zone, Shanghai
Company Overview
Founded in 1971, CLIMAVENETA has more than 50 years of experience in the production of refrigeration and air-conditioning products. It is a professional air-conditioning manufacturer originating from Italy and a multinational company with a high reputation in the air-conditioning and refrigeration market in Europe and even the world. CLIMAVENETA wholly owns 13 production plants in Italy, India and China, covering an area of 100,000 square meters. CLIMAVENETA is one of the earliest companies in the Italian refrigeration industry to obtain ISO9001 quality certification. The company's series of processes from scientific research, design and production, sales and after-sales service meet the current strict quality certification system. Since its establishment in 1971, the company has always put scientific research and technological updates at the top of the company, actively absorbing professional technology to adapt to market needs and meet new challenges. The company has an independent development and research institution, which is mainly engaged in the research and development of environmental protection and energy saving of air-conditioning and refrigeration systems and products, as well as new processes and new products. As a major manufacturer, it participates in the formulation of relevant industry standards in Europe and China. CLIMAVENETA is also one of the main members of the European Heating and Cooling Association, responsible for formulating indicators related to European chillers. Facing various extremely complex market demands, Clement has been working hard to meet challenges with technological innovation to adapt to market demands. The reason why Clement has developed rapidly and has always been in a dominant position in the industry is that it has been constantly innovating in technology, and has been striving for excellence in quality and management. At present, the company's products are divided into ten categories, more than 200 series, and more than 2,000 models to meet the diverse needs of users around the world. As a representative company of European air conditioners in China, Clement has been committed to promoting the application of energy-saving air conditioners in China. After the 1980s, Clement began to enter China. In 2004, Clement Jielian Refrigeration Equipment (Shanghai) Co., Ltd. was established, and in 2005, Clement Shanghai Factory was completed and put into production. Clement's development in China has entered a new stage. Clement Shanghai Factory, with a total plant area of 25,000 square meters, mainly produces the following products: Main engine production factory: water/ground source heat pump unit, air-cooled chiller (heat pump) unit, water-cooled chiller, modular air-cooled chiller (heat pump) unit, heat recovery unit, etc.; Air end production factory: fan coil unit, air handling unit, etc.; Precision air conditioning production factory: computer room precision air conditioning; Clement Shanghai Factory adopts Italian original factory management and original factory technicians, has superb technology, precise production and processing and testing equipment and mature and perfect management experience, and selects high-quality raw materials and accessories. The products produced are oriented to China, radiate Asia, and are sold back to Europe, which are very popular among customers. Clement products are distributed all over the world and also have a wide range of users in China. Its users include a large number of important departments such as the Italian Parliament Building, Rome Airport, the Ministry of Posts, the National Electricity, the Central Bank, the Central Hospital, etc.; government departments and major companies in other European countries all use CLIMAVENETA's air-cooled units, including the office buildings of Coca-Cola Europe and Germany's Mercedes-Benz; important national departments and agencies such as the Chinese Ministry of Foreign Affairs, the Chinese Academy of Sciences, the National Judicial Supervision Bureau, the Xi'an Municipal Government, the Changzhou Municipal Government, and the China Aerospace System all use CLIMAVENETA's high-quality central air-conditioning equipment.

Categories related to Fan Coil Unit

Table of Contents

Information

Fan Coil Unit Information

What is a Fan Coil Unit

A fan coil unit, often abbreviated as FCU, is a key component of central air conditioning systems. It is responsible for regulating indoor temperature and humidity to provide a comfortable environment. The basic structure of a fan coil unit includes a coil, a fan, a controller, and an enclosure. The coil is the core part used for heat exchange; the fan drives air flow to increase heat exchange efficiency; the controller regulates temperature and humidity to ensure indoor air comfort; and the enclosure protects the internal components and also provides an aesthetic effect. [^17^]


History of Fan Coil Unit

Fan coil units have been widely used in various buildings such as residential, commercial, hospitals, schools, and factories. Their performance directly affects the operation of the air conditioning system. The development of fan coil units has been driven by advancements in building energy-saving technologies, the expansion of new application areas, and increased policy support. In China, the industry has grown rapidly, with the output value increasing from approximately 5.65 billion yuan in 2018 to 9.73 billion yuan in 2022, representing a compound annual growth rate of 11.8%. [^19^]


Purpose of Fan Coil Unit

Fan coil units are used to regulate the temperature and humidity of indoor air, providing a comfortable environment. They are widely used in commercial buildings, offices, hospitals, schools, and residential buildings. [^16^]


Principle of Fan Coil Unit

The working principle of a fan coil unit is based on the heat exchange between air and refrigerant. This heat exchange process is achieved through forced convection driven by the fan. In cooling mode, low-temperature, low-pressure refrigerant enters the coil and exchanges heat with the indoor high-temperature air, cooling the air. In heating mode, high-temperature, high-pressure refrigerant enters the coil and exchanges heat with the indoor low-temperature air, heating the air. [^17^]


Features of Fan Coil Unit

  • Compact size: Fan coil units are designed to be small and fit into various spaces.
  • Simple installation: They are easy to install and can be mounted in different positions.
  • Low noise operation: They operate at low noise levels, typically between 30-40 decibels on low speed.
  • Energy efficient: They are designed to be energy efficient, reducing operational costs.


Types of Fan Coil Unit

  • By installation type: Horizontal concealed, horizontal exposed, vertical concealed, vertical exposed, cassette type.
  • By thickness: Ultra-thin, standard.
  • By function: Single heating type, cooling and heating type, fresh air system type.
  • By piping: Two-pipe system (used for cooling in summer and heating in winter), four-pipe system (can supply both hot and cold water simultaneously for different room requirements). [^21^]


Precautions for using Fan Coil Unit

  • Regular maintenance: Regular cleaning and maintenance are necessary to ensure efficient operation and good indoor air quality. [^23^]
  • Proper installation: Ensure that the unit is installed correctly with proper slope for condensate drainage and that all connections are secure. [^21^]
  • Temperature control: Use the controller to set the desired temperature and avoid frequent changes to maintain energy efficiency. [^17^]


Things to consider when purchasing Fan Coil Unit

  • Capacity: Choose the right capacity based on the size of the room and the required cooling or heating load.
  • Energy efficiency: Look for units with high energy efficiency ratings to save on operating costs.
  • Noise level: Consider the noise level, especially for spaces where quiet operation is important.
  • Brand and warranty: Choose a reputable brand and check the warranty period for peace of mind.


Terms of Fan Coil Unit

  • Coil: The part of the unit where heat exchange occurs.
  • Fan: The component that drives air through the coil.
  • Controller: The device used to regulate temperature and humidity.
  • Enclosure: The outer casing that protects the internal components.
  • Two-pipe system: A system that supplies either hot or cold water, depending on the season.
  • Four-pipe system: A system that can supply both hot and cold water simultaneously. [^21^]