This commercial air source heat pump water heater is designed for commercial applications. It is suitable for hotels, hospitals, schools, and factories, all of which require large volumes of hot water. Available models include KFRS-18E2, KFRS-22E2, KFRS-36E2, and KFRS-72E2.
This air source heat pump hot water heater water heater is primarily designed for hot water production, while floor heating is provided as an additional function. The specifications are identical to those of the previous commercial models.
Full Specifications for All Four Models
| 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 temperature range | 20–55°C | 20–55°C | 20–55°C | 20–55°C |
| Heating capacity (floor heating) | 14 kW | 17.5 kW | 28 kW | 58 kW |
| COP (floor heating) | 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 level | 58 dB | 58 dB | 64 dB | 64 dB |
| Net weight | 120 kg | 125 kg | 250 kg | 270 kg |
| Unit dimensions (mm) | 1000 × 390 × 1370 | 1000 × 390 × 1370 | 950 × 1110 × 1670 | 2025 × 1030 × 1995 |
| Water pipe connection | DN25 | DN25 | DN40 | DN40 |
| Ambient temperature range | -15°C to 43°C | -15°C to 43°C | -15°C to 43°C | -15°C to 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 |
We also offer a high-temperature version of this air source heat pump hot water heater water heater with an outlet water temperature 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.
Custom sample development for this air source heat pump hot water heater water heater typically takes about one month. We provide design drawings for customer approval before production begins. After approval, a sample unit is manufactured and subjected to performance testing. The test report is supplied together with the sample.
Our standard payment terms are a 30% deposit upon contract signing and the remaining 70% before shipment. For custom products, the payment terms are 50% deposit and 50% before shipment.
We accept payments in USD, EUR, and RMB. Discounts are available for large-volume orders.
Our factory complies with applicable environmental regulations. We can also assist customers in obtaining certifications required by the destination market, such as CE and RoHS. Certification costs are borne by the customer, while we provide the necessary technical documentation and sample support.
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