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| The NL-DCB15K is a four-fan commercial DC inverter heat pump with photovoltaic inverter system compatibility, designed for central heating and cooling systems in commercial buildings. It can work with solar PV panels according to project design, helping commercial projects use renewable energy, reduce grid electricity consumption and lower long-term operating costs. The unit provides 46kW heating capacity and 32.5kW cooling capacity, making it suitable for hotels, schools, factories, office buildings and other large spaces that require stable temperature control. With DC inverter technology, EVI technology and smart defrosting, it can operate reliably in low-temperature environments from -35°C to 45°C. It also uses R32/R410A refrigerant options, a Panasonic EVI compressor, Danfoss plate heat exchanger and Danfoss electronic expansion valve to ensure efficient and stable performance. | |||||||||
NL-DCB15K
Nulite New Energy
The NULITE Commercial DC Inverter Air Source Heat Pump delivers efficient and reliable heating and cooling for large-scale commercial applications. With heating capacities ranging from 46kW to 90kW, a COP of up to 3.55, and advanced EVI compressor technology, it ensures stable performance and energy-efficient operation even in extreme temperatures from -35°C to 45°C. Equipped with high-quality compressors and Danfoss heat exchangers, the system provides dependable temperature control and long-term durability. Ideal for hotels, schools, office buildings, factories, and other commercial facilities requiring efficient centralized heating and cooling solutions.
The NULITE Commercial DC Inverter Air Source Heat Pump offers heating capacities of 46kW, 65kW and 90kW, providing flexible solutions for large commercial buildings and centralized heating systems.
Its four-fan design supports efficient air circulation and heat exchange, making it suitable for hotels, schools, office buildings, factories and other commercial projects with high heating and cooling demands.
Designed for extreme climate conditions, the commercial heat pump operates within an ambient temperature range of -35°C to 45°C. Advanced EVI compressor technology enhances heating performance in low-temperature environments.
Its optimized refrigeration system helps maintain reliable operation during cold winters, providing stable heating performance for commercial buildings in regions with challenging weather conditions.
Equipped with advanced DC inverter technology, the heat pump automatically adjusts its operating output according to actual heating and cooling demand. With a rated heating COP of up to 3.55 at A7/W45°C, it delivers efficient energy utilization.
Compared with conventional fixed-speed systems, inverter operation helps reduce unnecessary energy consumption, minimize frequent start-stop cycles and maintain stable indoor comfort, supporting lower long-term operating costs.
The NULITE Commercial Air Source Heat Pump integrates heating and cooling functions into one efficient system, providing year-round temperature control for large commercial buildings.
It can be integrated with fan coil units, underfloor heating, radiators and centralized water circulation systems. This flexible configuration helps simplify system planning, reduce the need for separate heating and cooling equipment, and improve overall project efficiency.
The commercial heat pump features high-performance EVI compressors, Danfoss plate heat exchangers and Danfoss electronic expansion valves, providing efficient heat transfer and reliable system operation.
These carefully selected components help maintain stable performance under demanding operating conditions, reduce unnecessary maintenance requirements and support long-term reliability for commercial heating and cooling projects.
Designed for diverse commercial applications, the NULITE four-fan heat pump combines high heating capacity, wide temperature adaptability and efficient inverter operation to meet different project requirements.
From hotels and office buildings to schools, industrial facilities and commercial centers, the system supports flexible integration with centralized water systems, providing distributors, contractors and project developers with dependable heating and cooling solutions.
The unit supports the Modbus RTU protocol, allowing seamless integration with building automation and energy management systems. Key operating data—such as water temperatures, compressor status, operating mode, fault codes, and energy consumption—are monitored in real time, while on/off control, mode switching, temperature setpoints, and special functions including quiet mode and legionella disinfection are managed remotely. Multi-unit networking enables centralized management of multiple heat pumps.Customers can use their existing control systems to remotely monitor and control heat pumps.
This heat pump employs PV DC direct-drive technology, in which the photovoltaic system's DC output directly powers the compressor—no inverter or battery is required—thereby maximizing solar utilization. With adequate daytime sunlight, it achieves energy savings of up to 90%, and approximately 60% overall. The transition between mains and PV power is seamless: PV takes priority, while mains automatically makes up for any PV shortfall.
The NULITE Commercial DC Inverter Air Source Heat Pump is engineered for durability, reliability and long-term performance in demanding commercial environments. Featuring a robust metal cabinet and a four-fan design, the unit combines strong structural protection with efficient airflow and heat exchange. Its carefully designed exterior helps protect internal components and supports stable operation under varying outdoor conditions. Built for hotels, schools, factories and large commercial buildings, this heat pump delivers dependable heating and cooling performance, making every investment a reliable choice for long-term commercial applications.
The NULITE Commercial DC Inverter Air Source Heat Pump features an optimized four-fan airflow design that promotes smooth air circulation, reduces airflow resistance, and improves heat exchange efficiency. Its carefully engineered air passage helps distribute airflow evenly across the heat exchanger surface, supporting stable operation and efficient energy utilization. Combined with advanced DC inverter technology, the system automatically adjusts fan and compressor operation according to actual heating and cooling demand, helping reduce unnecessary energy consumption and operating noise. Designed for demanding commercial environments, it delivers efficient, reliable, and long-lasting heating and cooling performance for hotels, schools, office buildings, factories, and other large-scale projects.
Commercial DC Inverter Heat Pump – Front & Rear View
Front View
Four High-Efficiency Fans: Ensure smooth airflow and efficient heat exchange.
Protective Fan Grilles: Protect fan components and support stable operation.
Lower Cabinet Panel: Protects internal components and simplifies maintenance
Rear View
Nameplate: Displays model information and technical specifications.
Water Inlet & Outlet: Connect to centralized heating and cooling systems.
Electrical Connection: Supports safe power supply and system control.
Service Panel: Provides convenient access for inspection and maintenance.
NULITE Commercial DC Inverter Air Source Heat Pumps are equipped with high-performance EVI compressors, Danfoss plate heat exchangers, and Danfoss electronic expansion valves. These premium components work together to improve heat transfer efficiency, maintain stable operation in extreme temperatures, and deliver reliable heating and cooling performance for demanding commercial applications.
The advanced touchscreen controller supports multiple languages, enabling easy operation for global users. With a clear interface and smart temperature management, it provides convenient control of heating, cooling, and domestic hot water functions for a comfortable living environment.
Site Preparation & Unit Placement
Choose a well-ventilated outdoor location with sufficient space for air circulation and maintenance access. Install the NULITE Commercial DC Inverter Air Source Heat Pump on a stable, level concrete foundation with appropriate vibration isolation. Keep the four fans unobstructed to ensure efficient heat exchange and reliable operation.
Water Pipe Connection
Connect the heat pump to the centralized heating and cooling system through the appropriate water inlet and outlet connections. The unit supports integration with buffer tanks, fan coil units, radiators and underfloor heating systems. Ensure proper water circulation, pipe insulation and correct installation of circulation pumps and safety components to maintain stable operation and system efficiency.
Hotels & Resorts
Schools & Campuses
Factories & Industrial Buildings
Office Buildings & Commercial Centers
Photovoltaic Commercial Projects
NULITE Commercial DC Inverter Air Source Heat Pumps are designed for a wide range of commercial heating and cooling projects worldwide, providing efficient and reliable temperature control solutions. From hotels and resorts to schools, office buildings, factories, and commercial centers, NULITE heat pumps deliver stable heating and cooling performance to maintain comfortable indoor environments throughout the year.
With heating capacities ranging from 46kW to 90kW, advanced DC inverter technology, and EVI compressor technology, the system supports efficient operation even in extreme climates from -35°C to 45°C, helping commercial customers reduce energy consumption and long-term operating costs.
NULITE continues to provide professional commercial heating and cooling solutions for global customers, offering flexible system configurations to meet different building sizes, climate conditions, and project requirements.
Interested in commercial heat pump installation cases for your region? Contact us for project references, technical support, and customized heating and cooling solutions!
What is the NL-DCB15K used for?
The NL-DCB15K is a four-fan commercial DC inverter heat pump designed for central heating and cooling systems. It is suitable for hotels, schools, factories, office buildings and other commercial buildings that need stable temperature control.
What is the heating and cooling capacity of this model?
Can it operate in low-temperature areas?
Can the NL-DCB15K work with a photovoltaic system?
What main components does the unit use?
