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| Place of Origin: | Beijing,China |
| Brand Name: | Holtop |
| Certification: | CE |
| Model Number: | HLN-060C1 |
The 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 robust performance and low maintenance, this top-selling Holtop unit ensures long-term reliability and exceptional energy savings.
Compared with conventional chilled water systems, the ventilator's evaporation temperature is 8–10 °C higher. No secondary chilled-water heat exchange is required to transfer cooling capacity, increasing the refrigeration energy efficiency ratio by more than 30%.
The unit is built with a high-standard configuration engineered for dependable, continuous operation in demanding ventilation applications.
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 the heating mode, 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) achieves even higher efficiency.
The equipment directly processes fresh air introduced from outside and discharges indoor polluted air caused by human activity and building materials to the outdoors. The fresh air and exhaust air use independent channels, and air-isolation heat exchange ensures absolute air freshness while fundamentally eliminating cross-contamination. 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 is used to bear the indoor load, and only the supply and exhaust fans operate to achieve automatic ventilation without starting the compressor. No independent ventilation system needs to be configured, making the energy-saving effect more pronounced. When the temperature meets design requirements but humidity does not, only the fresh air needs to be treated without starting the air conditioning host system.
The equipment 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 delivers higher efficiency. The evaporative condensing unit adopts tubular evaporative condensing technology, fully utilizing the evaporation of the water film on the fin surface to achieve cooling and condensation of 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 needed to transfer cooling capacity. The refrigeration energy efficiency ratio is increased 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, including protection against phase loss, phase sequence errors, three-phase imbalance, compressor overload, fan overload, start-up delay, and abnormal exhaust pressure.
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