This large scale commercial heater is a professional hot water solution for commercial applications. Hangzhou Honny Heat Energy Technology Co., Ltd. was established in 2009 and has extensive experience in the heat pump industry. Our factory covers 7,000 square meters and employs 52 skilled workers. This large scale commercial heater is designed for distributors and agents worldwide and is suitable for a wide range of commercial applications.
We offer four standard models: KFRS-18E2, KFRS-22E2, KFRS-36E2, and KFRS-72E2.
We also offer a high-temperature version capable of providing outlet water temperatures of up to 75°C. Standard high-temperature models include the KFRS-20K7 and KFRS-45K7. These units use R134a refrigerant and scroll compressors, with optional variable-frequency water pumps and variable-frequency fans.
Our factory operates under the ISO 9001 quality management system. Every unit undergoes a complete inspection before shipment, and key components are subject to additional quality checks. Third-party inspections are also accepted upon request.
This large scale commercial heater uses R410A refrigerant and operates reliably in ambient temperatures ranging from -15°C to 43°C. Installation is simple with standard DN25 or DN40 pipe connections. Models KFRS-18E2, KFRS-22E2, and KFRS-36E2 are available with optional built-in water pumps. All models support auxiliary electric heating and indoor signal control. Models KFRS-36E2 and KFRS-72E2 also support modular control.
For overseas distributors and agents, we provide free spare parts with bulk orders. In the event of verified batch-quality issues, our company will take responsibility and provide appropriate corrective support. Standard production lead time is 15–20 days.
OEM and ODM services are also available.
Choose this large scale commercial heater for hotels, factories, schools, hospitals, and large commercial buildings requiring reliable hot water solutions.
Key Specifications
| Parameter | KFRS-18E2 | KFRS-22E2 | KFRS-36E2 | KFRS-72E2 |
| Heating capacity | 18 kW | 22 kW | 36 kW | 72 kW |
| Rated input power | 4.2 kW | 5.3 kW | 8.6 kW | 16.8 kW |
| COP | 4.29 | 4.15 | 4.19 | 4.17 |
| Rated hot water output | 386 L/h | 473 L/h | 770 L/h | 1550 L/h |
| Hot water temp range | 20-55°C | 20-55°C | 20-55°C | 20-55°C |
| Floor heating capacity | 14 kW | 17.5 kW | 28 kW | 58 kW |
| Floor heating COP | 3.9 | 3.8 | 3.8 | 3.8 |
| Circulating water flow | 3.1 m³/h | 3.8 m³/h | 6.2 m³/h | 7.8 m³/h |
| Water resistance | ≤35 kPa | ≤35 kPa | ≤50 kPa | ≤50 kPa |
| Compressor type | Rotary | Rotary | Rotary | Scroll |
| Number of compressors | 1 | 1 | 1 | 2 |
| Refrigerant | R410A | R410A | R410A | R410A |
| Noise | 58 dB | 58 dB | 64 dB | 64 dB |
| Net weight | 120 kg | 125 kg | 250 kg | 270 kg |
| Unit dimension (mm) | 1000×390×1370 | 1000×390×1370 | 950×1110×1670 | 2025×1030×1995 |
| Water pipe connection | DN25 | DN25 | DN40 | DN40 |
| Ambient temperature | -15~43°C | -15~43°C | -15~43°C | -15~43°C |
| Water flow switch | Optional | Optional | Built-in | Built-in |
| Built-in water pump | Optional | Optional | Optional | Not built-in |
| Auxiliary electric heating | Supported | Supported | Supported | Supported |
| Indoor signal control | Supported | Supported | Supported | Supported |
| Modular control | Not supported | Not supported | Supported | Supported |
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