This small commercial water heater gives you high heating power without taking up much space. It is perfect for small businesses like便利店, small shops, and small offices. Our company has 17 years of experience. We can customize products from your drawings or prototypes. Monthly output for home models reaches 5000 sets. For commercial ones, we have enough capacity for large orders. We accept USD, EUR, and RMB. Bulk orders get better prices. Repeat orders ship faster. This small commercial water heater helps you save on costs.
Four Models with Complete Data
| 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 |
| Hot water output | 386 L/h | 473 L/h | 770 L/h | 1550 L/h |
| Hot water temp | 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 | No |
| Auxiliary electric heating | Yes | Yes | Yes | Yes |
| Indoor signal control | Yes | Yes | Yes | Yes |
| Modular control | No | No | Yes | Yes |
This small commercial water heater runs on R410A refrigerant. The compressor works smoothly. Noise stays at 58-64 dB. Models 18, 22, and 36 include a built-in water pump. Model 72 does not have one. The unit works from -15°C to 43°C. Pipe connections are standard DN25 or DN40. Installation is quick. We support OEM and ODM. Standard products ship in 15-20 days.Dedicated personnel handle all after-sales issues. This compact commercial water heater is a smart choice for small shops and offices.
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