High-Efficiency 4kW 220V Ground Source Water-to-Water Heat Pump

High-Efficiency GMCC Rotary Compressor

Powered by a reliable GMCC rotary compressor, the RFJ-WW-4X delivers stable 4 kW thermal output with high operational efficiency, drastically lowering heating bills compared to traditional electric boilers or fossil-fuel heating systems.

Dual High-Performance Plate Heat Exchangers

Equipped with high-efficiency brazed plate heat exchangers on both ground-loop and load sides, optimizing thermal transfer from vertical rock boreholes, surface soil, ground water wells, or lake collectors.

Built-in Protection & Simplified Control

Features an integrated water flow safety switch to protect against low-flow operation, paired with a user-friendly simplified digital controller for straightforward temperature management and operation.

• Standard Components: GMCC rotary compressor, dual brazed plate heat exchangers, built-in water flow switch, and simplified digital controller.
• System Design Notes:
  • Heating-Only Configuration: Designed specifically for residential hydronic heating systems.
  • External Pump Requirement: Unit does not include an internal water pump; external circulation pumps are required for ground and load loops.

• Residential Hydronic Radiant Heating: Ideal for small residential homes, cottages, and villas using underfloor heating loops, fan coil units, or low-temperature radiators.
• Geothermal Ground Loop Systems: Compatible with all standard geothermal ground sources including vertical rock boreholes, horizontal ground loops, open/closed ground water, or lake heat exchangers.
• Energy-Saving Heating Retrofits: Designed to replace traditional electric resistance heaters or fossil-fuel boilers to cut carbon emissions and operational costs.

Ruifujie is an established manufacturer and global exporter in the HVAC and industrial refrigeration sector with over two decades of technical expertise. Our complete product catalog includes scroll, reciprocating, rotary, semi-hermetic, and screw compressors, alongside commercial heat pumps, cold storage units, and industrial ice-making machinery. Supported by full B2B OEM/ODM customization and strict factory testing protocols, Ruifujie serves engineering contractors and equipment distributors across the United States, Russia, the United Kingdom, the United Arab Emirates, Saudi Arabia, and over 60 countries worldwide.