Heat Pump
Manufacturer & Supplier in China
When you source heat pumps from Legom, you specify air source units that provide both winter heating and summer cooling from a single outdoor unit, running on low-GWP R32 refrigerant and a high-efficiency full DC inverter compressor that holds efficiency in temperatures as low as -35°C. Legom’s range spans 5kW to 16kW, sized from small two to three bedroom homes up to large houses and light commercial buildings, reaching a coefficient of performance of 4 or more under favourable conditions, all CE and RoHS certified and ready to feed underfloor heating, radiators, or domestic hot water from a single factory-direct source.
5kw Heat Pump
6kw Heat Pump
9kw Heat Pump
16kw Heat Pump
Product Range
Legom manufactures air source heat pumps for residential and light commercial heating and cooling, available across four capacities: 5kW, 6kW, 9kW, and 16kW. Every unit runs on R32 refrigerant with a full DC inverter compressor, delivering heating in winter and cooling in summer from a single outdoor unit. The range is engineered to keep working in temperatures as low as -35°C, and all models are CE and RoHS certified, produced at our own facility in Jiaxing, Zhejiang Province, and available for OEM and ODM customization.
Compare the Heat Pump Range
| Model | Heating Capacity | Refrigerant | Compressor | Functions | Best For |
|---|---|---|---|---|---|
| 5kW Heat Pump | 5 kW | R32 | Full DC inverter | Heating and cooling | Small to medium homes, 2 to 3 bedrooms |
| 6kW Heat Pump | 6 kW | R32 | Full DC inverter | Heating and cooling | Medium homes with moderate heat demand |
| 9kW Heat Pump | 9 kW | R32 | Full DC inverter | Heating and cooling | Medium to large homes |
| 16kW Heat Pump | 16 kW | R32 | Full DC inverter | Heating and cooling | Large homes and light commercial buildings |
5kW, 6kW and 9kW Heat Pumps
The 5kW, 6kW, and 9kW units share the same compact residential platform and are sized to cover most homes. The 5kW model suits small to medium houses with two to three bedrooms, while the 6kW and 9kW models step up for medium and larger homes. Each runs on R32 refrigerant with a full DC inverter compressor that adjusts output to the real heat demand, holding a stable indoor temperature while keeping energy use down.
| Parameter | Specification |
|---|---|
| Heat Source Type | Air source |
| Heating Capacity | 5 kW / 6 kW / 9 kW |
| Functions | Heating and cooling |
| Refrigerant | R32 (GWP 675) |
| Compressor | High-efficiency full DC inverter |
| Min. Ambient Operating Temperature | Down to -35°C |
| Coefficient of Performance (COP) | Up to 4 or more |
| Power Supply | Single phase, 220 to 240V / 50Hz |
| Certification | CE, RoHS |
| Recommended Application | Residential heating and cooling |
16kW Heat Pump
The 16kW unit is the high-capacity model in the range, built for large homes and light commercial buildings where heat demand is higher. It uses the same R32 and full DC inverter platform as the smaller units, scaled up for larger heating and cooling loads while keeping the low-temperature operation down to -35°C.
| Parameter | Specification |
|---|---|
| Heat Source Type | Air source |
| Heating Capacity | 16 kW |
| Functions | Heating and cooling |
| Refrigerant | R32 (GWP 675) |
| Compressor | High-efficiency full DC inverter |
| Min. Ambient Operating Temperature | Down to -35°C |
| Coefficient of Performance (COP) | Up to 4 or more |
| Power Supply | Single or three phase, confirm with the technical team |
| Certification | CE, RoHS |
| Recommended Application | Large homes and light commercial heating and cooling |
All models are air source heat pumps using R32 refrigerant and a full DC inverter compressor, providing both heating and cooling and rated to operate down to -35°C. Exact COP, noise level, dimensions, and power supply vary by model and configuration. Contact the Legom Technical Team to confirm full specifications and select the right capacity for your building.
How to Select the Right Heat Pump
Choosing the correct heat pump comes down to the heat load of your building, the climate it will run in, and how it connects to your heating system. Confirm these three points before ordering:
Capacity and building size
Match the kW rating to the heat load of the property. The 5kW model suits small to medium homes with two to three bedrooms, the 6kW and 9kW models cover medium to larger homes, and the 16kW model is built for large houses and light commercial buildings. An undersized unit struggles in cold weather, and an oversized one cycles inefficiently, so size to the actual load.
Climate and operating temperature
Legom heat pumps are engineered to keep running in temperatures as low as -35°C, so they suit cold-climate projects where many standard units lose performance. The R32 refrigerant and full DC inverter compressor maintain a usable COP across a wide ambient range, which is what protects efficiency through winter.
System integration
Decide how the heat pump feeds your heating system. It can supply low-temperature water to a manifold-based underfloor heating loop, to radiators, or to a domestic hot water tank. Pairing it with Legom manifolds, floor heating pipe, and room thermostats builds a complete, controllable hydronic system.
Once you have these three points, the Legom engineering team can recommend the right capacity and configuration, or start a custom OEM project. Contact us via WhatsApp or info@legomsmart.com.
Manufacturing Capacity
Legom's heat pumps are produced at our facility in Jiaxing, Zhejiang Province, China, with in-house chassis and cabinet assembly, refrigeration circuit build, refrigerant charging, electrical and controls integration, and full performance testing on every unit. This integrated production gives consistent quality and batch-to-batch repeatability for distributors and HVAC system integrators worldwide.
| Parameter | Detail |
|---|---|
| Production Location | Jiaxing, Zhejiang Province, China |
| Product Type | Air source heat pump, heating and cooling |
| Capacity Range | 5 kW, 6 kW, 9 kW, 16 kW |
| Refrigerant | R32 (GWP 675) |
| Compressor | High-efficiency full DC inverter |
| Min. Ambient Operating Temperature | Down to -35°C |
| Certification | CE, RoHS |
| Quality Inspection | Performance and leak testing on every unit |
| Primary Export Markets | 90+ countries served globally |
| Shipping Methods | Sea freight / Air freight / Express courier |
| OEM Partners | 400+ globally |
As a direct manufacturer, Legom supplies heat pumps to HVAC distributors and underfloor heating system builders across 90+ countries through 400+ OEM partners. The company also produces the matching components for a complete hydronic system, including manifolds, floor heating pipe, thermal actuators, HVAC valves, and room thermostats.
Production Process
7-Stage Production Process
Every Legom heat pump passes a structured 7-stage process, ensuring the build quality, refrigeration integrity, and verified performance that B2B buyers depend on at scale.
Component Intake
Compressors, heat exchangers, fans, and electronics inspected for grade and specification
Cabinet and Chassis Build
Outdoor unit chassis, panels, and coil assembly built and prepared for the refrigeration circuit
Refrigeration Circuit Assembly
DC inverter compressor, heat exchangers, and piping assembled and brazed into a sealed circuit
Vacuum and R32 Charging
Circuit evacuated, vacuum held, then charged with R32 refrigerant to the correct weight
Electrical and Controls
Inverter board, sensors, and controller wired and configured for heating and cooling operation
Performance and Leak Testing
Each unit run-tested for heating and cooling output and checked for refrigerant leaks
Final QC and Packaging
Function, finish, and labelling verified before packaging for export
Each Legom heat pump is produced through this controlled process at our Jiaxing facility. Inspected components are built into the chassis and refrigeration circuit, the sealed circuit is evacuated and charged with R32, and the electrical and control system is wired for heating and cooling. Every unit is then performance and leak tested before passing a final quality check and packaging for export.
What Legom's OEM Service Covers
Legom's OEM and ODM service for heat pumps covers the full development and production cycle:
- ● Capacity selection: Legom's engineering team helps you select the right capacity from the 5kW to 16kW range based on the heat load and climate of your target market.
- ● Branding and appearance: Casing colour, logo, nameplate, and packaging can be customized to your brand for private-label supply.
- ● Controls and configuration: Controller, display, and operating parameters can be adapted to your control scheme and connectivity requirements.
- ● Sample and approval cycle: Samples are produced and performance tested against your specification before production commitment.
- ● Production batch testing: Performance and leak test records are available for production batches.
- ● Confidentiality: All OEM and ODM projects are handled under strict NDA.
Applications
Legom heat pumps are used wherever a building needs efficient heating and cooling from a single electric unit. They sit at the heart of a low-carbon HVAC system in homes, commercial buildings, and renovation projects, transferring heat instead of burning fuel.
Underfloor Heating Systems
The primary application. The heat pump supplies low-temperature water to a manifold-based floor loop, an efficient pairing because underfloor heating runs at the low flow temperatures heat pumps deliver best. Combine it with Legom manifolds and floor heating pipe for a complete system.
Residential Heating and Cooling
A single unit covers winter heating and summer cooling, with the 5kW to 9kW models sized for small to large homes and the 16kW model for the largest residences.
Radiator Central Heating
The heat pump can replace a gas or oil boiler in a radiator system, feeding hot water to existing or low-temperature radiators for a lower-carbon heat source.
Domestic Hot Water
Paired with a hot water cylinder, the heat pump produces domestic hot water efficiently, covering both space heating and hot water from one system.
Light Commercial Buildings
The 16kW model suits offices, shops, and small commercial spaces where a single high-capacity unit, or several units, can cover the heating and cooling load.
Cold-Climate and Retrofit Projects
With operation down to -35°C, the range suits cold-climate regions and renovation projects switching from fossil-fuel heating to an efficient electric heat source.
Frequently Asked Questions
Legom manufactures air source heat pumps in four capacities: 5kW, 6kW, 9kW, and 16kW. All run on R32 refrigerant with a full DC inverter compressor, provide both heating and cooling, and are produced in-house at our Jiaxing facility with CE and RoHS certification.
It depends on the heat load of the building, not just floor area. As a general guide, the 5kW model suits small to medium homes with two to three bedrooms, the 6kW and 9kW models cover medium to larger homes, and the 16kW model is for large houses and light commercial buildings. Insulation, climate, and the number of zones all affect sizing, so confirm the load with our technical team before ordering.
Yes. Legom heat pumps are reversible, providing efficient heating in winter and cooling in summer from the same unit. The system moves heat into the building in heating mode and out of the building in cooling mode, so one unit covers both seasons.
R32 has a Global Warming Potential of 675, far lower than older refrigerants such as R410A, which makes it a more environmentally responsible choice. It also has strong heat absorption during evaporation, which supports a higher coefficient of performance and helps the heat pump run efficiently at typical operating temperatures.
A DC inverter compressor varies its speed to match the real heat demand instead of switching fully on and off. This keeps the indoor temperature stable, avoids the energy spikes of constant cycling, and lowers running costs. It is the technology that lets the heat pump hold efficiency across a wide range of conditions.
Legom air source heat pumps are engineered to keep running in temperatures as low as -35°C. This makes them suitable for cold-climate regions where many standard units lose output. Performance does drop as the ambient temperature falls, which is normal for any heat pump, so cold-climate projects should be sized with the design temperature in mind.
COP, the Coefficient of Performance, is the ratio of heat output to electricity input. A COP of 4 means the unit delivers four units of heat for every unit of electricity it uses, because it moves heat from the air rather than generating it directly. Legom heat pumps can reach a COP of 4 or more under favourable conditions, which is why they cost far less to run than direct electric heating.
Yes, and it is one of the best pairings. Underfloor heating runs at low water temperatures, which is exactly where a heat pump is most efficient. The heat pump feeds a Legom manifold that splits the flow into individual floor loops in floor heating pipe, each controlled by a room thermostat for room-by-room comfort.
Yes. Legom is a direct manufacturer offering full OEM and ODM services for heat pumps, including capacity selection, casing and branding, controller and parameter configuration, and packaging. All customization projects are handled under strict confidentiality. Contact our team to discuss your requirements.
Legom is a manufacturer. Our heat pumps are produced at our own facility in Jiaxing, Zhejiang, China, with in-house assembly, refrigerant charging, controls integration, and performance testing. We supply distributors and system integrators in 90+ countries directly, and we also manufacture the matching manifolds, floor heating pipe, thermal actuators, HVAC valves, and room thermostats for complete hydronic systems.