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KFXRS-21 II/C Efficient Swimming Pool Thermostat Pump

 
Swimming Pool Constant Temperature Control

TENESUN swimming pool constant temperature control machines utilize innovative electric motivation technology and there is no need to consume traditional fuels. By efficiently absorbing free heat from the air and change it to thermal energy, they provide a constant and stable warm for the pool. They have double advantages for energy and cost savings and safely environmental protection.
 
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Product Overview


The KFXRS-21 II/C Efficient Swimming Pool Thermostat Pump is a compact, high-efficiency air-source swimming pool heat pump designed to deliver precise constant temperature control for commercial and high-end residential pools. By integrating innovative electric drive technology and intelligent temperature management systems, it abandons traditional fuel consumption, instead absorbing free heat from the air to warm pool water. This eco-friendly solution solves the long-standing pain points of traditional heaters—high energy costs, large temperature fluctuations, and environmental pollution—while maintaining a temperature control accuracy of ±0.5℃. With a heating capacity of 22.5kW, COP of 6.52, and compact dimensions (1153×480×1100mm), the KFXRS-21 II/C Efficient Swimming Pool Thermostat Pump is ideal for space-constrained commercial venues and luxury private pools, enabling year-round comfortable swimming with low operational costs.


KFXRS-21-II-C


Scenario-Based Solutions: Versatile for Commercial & High-End Scenarios


Boutique Commercial Venues: Perfect for Boutique Hotels & Private Clubs

For boutique hotels, resort clubs, and small-scale chain gyms with swimming pools (50-300㎡), the KFXRS-21 II/C Efficient Swimming Pool Thermostat Pump offers a balance of efficiency and space-saving design. Its compact size allows flexible installation in limited equipment rooms, while the 22.5kW heating capacity efficiently maintains stable water temperatures for guest use. The low energy consumption (3.45kW rated power input) reduces utility bills for small to medium-sized commercial operators, and the IPX4 waterproof rating ensures safe operation in humid environments. It also supports integration with hotel management systems, enabling centralized control and temperature adjustment based on guest occupancy.


High-End Residential & Villa Pools

Luxury villas, courtyard private pools, and high-end residential communities (10-50㎡ pools) benefit from the KFXRS-21 II/C Efficient Swimming Pool Thermostat Pump’s quiet operation (60dB(A)) and smart functionality. It operates without disturbing daily life, even during nighttime heating, and supports mobile APP remote control—allowing homeowners to pre-set temperatures and monitor operation anytime, anywhere. The anti-corrosion coil heat exchanger withstands outdoor weather conditions, reducing maintenance needs for long-term residential use. With a rated water flow of 3.9m³/h and water pressure drop of 45kPa, it adapts to small to medium pool circulation systems, ensuring uniform heating.


Educational & Community Small-Scale Pools

For primary school indoor pools, community mini-fitness pools, and rehabilitation centers (30-80㎡), the KFXRS-21 II/C Efficient Swimming Pool Thermostat Pump prioritizes safety and stability. Its precise temperature control (34℃-36℃ for rehabilitation pools, 28℃-30℃ for student pools) prevents health risks from temperature fluctuations, while the Class I anti-electric shock protection ensures user safety. The machine’s super-high stability handles daily teaching and fitness use, and the low energy consumption aligns with schools and communities’ cost-saving needs.


Core Product Features: Efficiency, Precision & Reliability


Accurate Constant Temperature Regulation

Combines high-precision sensing systems and PID intelligent algorithms to adjust water temperature in real time, maintaining a ±0.5℃ range for consistent comfort.

Symmetrical heating design eliminates cold spots in the pool, with customizable temperature settings for different usage scenarios (competitive, fitness, rehabilitation).

Operates stably across a wide ambient temperature range (-15℃ to 45℃), solving frost issues in low temperatures via intelligent defrost technology (defrosts only when frost is present).


Superior Energy Efficiency & Environmental Friendliness

Achieves a COP of 6.52 (at 20/15℃ ambient temp, 25℃ input water temp), outperforming traditional electric heaters and gas-fired equipment in energy efficiency.

Utilizes air-source heat recovery technology, converting free atmospheric heat into usable energy, reducing carbon emissions and environmental impact.

Automatically adjusts operating power based on ambient temperature and water temperature deviation, optimizing energy use and lowering operational costs.


Durable & Easy to Maintain

Adopts updated anti-corrosion materials for heat exchangers and body components, resisting corrosion from pool chemicals and outdoor elements.

Integrated intelligent protection system includes overload, overheating, and water shortage protection, extending equipment lifespan and reducing failure risks.

User-friendly easy repair design allows quick access to key components, simplifying maintenance and minimizing downtime for commercial and residential users.


Customized System Solutions


To meet the unique needs of commercial energy systems, we provide tailored services for the KFXRS-21 II/C Efficient Swimming Pool Thermostat Pump:

Custom system design: Adjust heating capacity, pipeline layout, and control systems based on pool size, usage frequency, and regional climate conditions.

Intelligent integration: Connect with building automation systems (BAS) and energy management platforms for centralized monitoring and data analysis.

Professional installation & training: Certified technicians handle on-site installation, commissioning, and operator training to ensure optimal performance.

Long-term after-sales support: Regular maintenance services, 24/7 technical support, and genuine spare parts supply to maximize equipment reliability and service life.



Model: KFXRS-


21Ⅱ/C

42Ⅱ/A

55Ⅱ/A

76Ⅱ/A

95Ⅱ/A

Ambient Temp.(DB/WB):20/15℃; Water Temp.(Input):25℃

Heating Capacity

kW

22.50

43.2

59.6

85.0

103.0

Heating Power Input

kW

3.45

6.50

8.90

12.80

15.50

COP

W/W

6.52

6.65

6.70

6.64

6.65

Power Supply


380V 3N~50Hz

Ambient Temp.(DB/WB):43/26℃; Water Temp.(Output):55℃







Max. Power Input/Current(Water Temp.(Out)55℃)

kW/A

7.3/12.5

15.0/27.0

20.0/35.8

30.0/54.0

35.8/67.0

Max. Power Input/Current(Water Temp.(Out)45℃)

kW/A

6.2/11.5

12.0/22.5

16.5/30.6

24.0/45.0

30.5/56.6

Rated Water Flow

m3/h

3.9

7.4

10.2

14.6

17.7

Water Pressure Drop

kPa

45

75

80

85

75

Operation Ambient Temperature

-15~45

Body size(L×W×H)

mm

1153×480×1100

1450×850×1390

1900×950×2080

1900×950×2225

Water-Proof Grade


IPX4

Anti-Electric Shock Rate


Noise

dB(A)

60

59

65

67

68

Diameter of Pipe

mm

DN25

DN40

DN40

DN50

DN65


Thread

Net Weight

kg

130

320

380

550

750


Refer to Standard JB/T11969-2014 Swimming Pool Air source Hot Water Heat Pump.

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