Maanshan Leonon Energy Saving Technology Co., Ltd.

Best Air Source Heat Pump Manufacturer & Supplier in China

Leomon's air-source heat pumps are exported worldwide. We currently have a network of distributors and agents in over 60 countries.

Leomon also partners with local heat pump companies on OEM/ODM services. We can customize heat pumps for our partners' brands and produce them in accordance with European standards.

Leomon boasts three air-source heat pump production bases, 40 automated production lines, and 24 international laboratories certified by TÜV Rheinland, Intertek, SGS, and Kiwa. Our total annual production capacity exceeds 2 million units.

Advanced equipment and experienced workers ensure our robust production capabilities.

Leomon prioritizes product R&D and technological innovation. We operate 20 in-house validation laboratories, including 10 -45°C enthalpy difference chambers and 10 long-term durability testing laboratories.

We also have a CNAS-accredited laboratory.

As one of China's largest heat pump manufacturers, Leomon employs over 2,000 people. Our heat pump manufacturing center boasts four production sites with 24 production lines, including two automated ones. All production lines are monitored by a manufacturing execution system (MES) to enhance efficiency.

Leomon boasts a strong technical team of over 350 people and a modern R&D center. We have obtained 430 patents covering a wide range of technologies, including ultra-low temperature EVI, CO2, and ultra-high temperature. Our products are certified to the standards of most countries worldwide.

2005
Leomon was established, specializing in solar water heaters.

2006
Leomon participated in the first central hot water system.

2007
Leomon developed the first commercial air-to-water heat pump and obtained ISO 9001 and ISO 14001 certifications.

2008
Leomon's first large-scale order for air-source heat pumps was exported to Europe.

CE certification was obtained.

2011
A production base was established in the Ma'anshan Development Zone.

2012
Leomon obtained TUV's 3C certification and EN14511 test report.

2013
Leomon was named one of China's top ten heat pump brands for the first time. Leomon's EVI-25°C cold-climate heat pump attracted numerous customers worldwide.

2014
Sipson was awarded the title of High-Tech Enterprise and again ranked among China's top ten heat pump brands.

2016
Leomon's production base expanded threefold.

2017
Leomon was named one of China's top ten heat pump brands for the third time and developed a DC inverter heat pump.

2018
Leomon designed Wii control for its air source heat pump.

2020
Leomon's enhanced DC inverter heat pump received ERP A+++ certification.

2021
Developed an R32 DC inverter heat pump.

2023
Developed a CO2 (R744) heat pump.

2025
Developed a high-temperature heat pump (water outlet temperature up to 150°C).

Quality Control
We understand the importance of quality control. Every SPRSUN heat pump undergoes rigorous quality testing to ensure it can withstand harsh weather, humidity, mold, and other real-world environmental conditions. Quality assurance begins early in the entire value-added chain, from system design inspection, incoming material inspection, pipe connection control, to final assembly system testing.

1. System Design Quality Control
System design, component design, housing design, piping design, and wiring design

2. Incoming Material Quality Control
Supplier evaluation, material quality inspection,
Heat exchanger leak inspection, and electrical unit inspection

3. Pipe Splicing Quality Control
Bending, pipe drilling, shrinking, expanding, grinding, cleaning, and welding

4. Assembly System Quality Control
Welding, leak detection, vacuuming, refrigerant charging, pipe insulation application, silencer application, and control system connection

OEM Customization Services
We have over 560 strategic partners in over 60 countries worldwide and have established OEM/ODM partnerships with heat pump companies, making us one of China's leading heat pump manufacturers.