This heat pump system is designed for versatile applications including sanitary hot water, floor heating, and swimming pool heating. It features a specialized compressor and operates efficiently with an eco-friendly refrigerant. Advanced components such as a two-speed fan motor, electronic expansion valve, and enhanced heat-exchanger cycle contribute to stable performance across both high and low ambient temperatures. The hydrophilic-coated air exchange mechanism and innovative tube-in-tube heat exchanger improve reliability while combating scaling concerns. A durable galvanized and powder-coated housing ensures protection and longevity. With LCD controller support, hot-water return control, flexible scheduling, and automatic operation tied to tank temperature, the system offers both convenience and efficiency. Additional protections — including defrosting, freeze prevention, and water-flow monitoring — ensure safe operation, while auxiliary heating integration helps maintain optimal comfort.
Designed specifically for heat pump applications
Eco-friendly refrigerant R410a
Two-speed fan motor for better high-temperature performance
Electronic expansion valve for precise refrigerant control
Optimized heat-exchanger cycle for low-temperature operation
Fin-coil air exchange system with hydrophilic coating
Tube-in-tube heat exchanger with spiral design (shell-type option available)
Galvanized housing with durable powder-coat finish
LCD display wire controller
Hot-water return control for consistent warmth
Customizable operating times and user-friendly scheduling
Automatic mode linked to tank temperature
Automatic defrosting function
Freeze-prevention feature for winter operation
Built-in water-flow protection
Auxiliary heater control for maintaining set temperatures
Download the catalog to view specifications for other models.
| Model | KFRS-18E2 | KFRS-22E2 |
|---|---|---|
| Power supply(V/Ph/Hz) | ||
| 380/3/50 | ||
| Hot water model | ||
| Heating capacity (kW) | 18 | 22 |
| Rated power input (kW) | 4.2 | 4.9 |
| COP | 4.3 | 4.5 |
| Rated hot water output (L/h) | 390 | 480 |
| Hot water temperature (℃) | 20 – 55 | |
| Floor heating | ||
| Heating capacity (kW) | 18 | 22.5 |
| Rated power input (kW) | 3.6 | 4.6 |
| Rated current (A) | 6.8 | 8.7 |
| Range of Water temp (℃) | 20 – 55 | |
| Max Power Input (kW) | 7.2 | 7.5 |
| Max Current Input (A) | 13.5 | 15 |
| Circulating water flow (m³/h) | 3.2 | 3.9 |
| Water Drop (kPa) | 50 | 50 |
| Compressor type | Scroll | |
| Refrigerant Type | R410a | |
| Refrigerant Filling capacity (kg) | 4.8 | 6.4 |
| Noise (dB(A)) | 64 | 64 |
| Net weight (kg) | 180 | 200 |
| Unit dimensions (L×W×H) (mm) | 1000×390×1380 | 1000×390×1380 |
| Water pipe connector (mm) | DN25(1") | DN25(1") |
| Ambient condition (℃) | -10 – 43 | |
| Water flow switch | Optional | Optional |
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