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| Place of Origin: | Beijing,China |
| Brand Name: | Holtop |
| Certification: | CE |
| Model Number: | HLN-050B1-DC |
The HLN-050B1-DC Holtop Condensing Exhaust Heat Recovery Air Handling Unit (AHU) delivers a continuous supply of fresh, pre-conditioned air while maintaining strict indoor air quality standards. Its intelligent control system enables precise adjustment of airflow and heat recovery rates, adapting seamlessly to changing environmental conditions. Built for durability and low maintenance, this unit provides long-term reliability and exceptional energy-saving performance for sustainable ventilation solutions.
Compared with conventional chilled water systems, the ventilator's evaporation temperature is 8–10 °C higher, and no secondary chilled-water heat exchange is needed to transfer cooling capacity — raising the refrigeration energy efficiency ratio by more than 30%.
Heat recovery efficiency exceeds 92%. Low-temperature, low-humidity indoor exhaust air is used as the cooling air for the evaporative condenser, utilizing both the sensible heat (temperature difference) and latent heat (humidity difference) of the exhaust. This delivers a far better condensation effect than using outdoor air directly as cooling air, avoiding the energy loss caused by air conversion ventilation. Likewise, during heating operation, the high-temperature, high-humidity air discharged from the room serves as the heat-exchange source on the evaporator side. Compared with traditional central air conditioning systems, fresh air load energy consumption is reduced by approximately 50%, and the sensible heat exchange type (optional) offers even higher efficiency.
The unit directly processes fresh air introduced from outside and discharges indoor polluted air generated by human activity and building materials to the outdoors. Fresh air supply and exhaust use independent channels, and air-isolation heat exchange meets control and regulation requirements while ensuring absolute air freshness — fundamentally eliminating cross-contamination between air streams. The unit can also be equipped with ozone disinfection, ultraviolet sterilization, and high-voltage electrostatic dust removal, making it suitable for hospitals and other facilities with stringent air quality requirements.
During the transition season, fresh air alone bears the indoor load, and only the supply and exhaust fans operate to provide automatic ventilation without starting the compressor. No independent ventilation system is needed, making the energy-saving effect even more pronounced. When temperature meets design requirements but humidity does not, fresh air can be treated without starting the air conditioning host system.
The unit features an integrated structure with no outdoor unit, cooling tower, or high-power cooling water pump. The power distribution of the fan and water pump significantly reduces initial project investment and improves efficiency. The evaporative condensing unit adopts tubular evaporative condensing technology, fully utilizing water film evaporation on the fin surface to cool and condense the working medium in the condenser through mass and heat transfer.
Compared with conventional chilled water systems, the ventilator's evaporation temperature is 8–10 °C higher, and no secondary chilled-water heat exchange is required to transfer cooling capacity — increasing the refrigeration energy efficiency ratio by more than 30%.
The unit uses a full Chinese LCD interface and microcomputer intelligent controller, offering advanced control, complete functions, and a high degree of electromechanical integration. It supports unit start/stop program management, timing control, full-function fault alarms, and fault self-diagnosis. The controller provides comprehensive automatic control with strong anti-interference capability, plus multiple protections including phase loss, phase sequence, three-phase imbalance, compressor overload, fan overload, start-up delay, and abnormal exhaust pressure.
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