HLN-010C1 Sustainable Ventilation Solution Holtop Condensing Exhaust Heat Recovery AHU for Smart Investment

The Holtop AHU is built with high-standard components and a robust structure, ensuring dependable, long-term operation with minimal maintenance requirements.

The heat recovery efficiency exceeds 92%. Low-temperature, low-humidity indoor exhaust is used as cooling air for the evaporative condenser, utilizing both the sensible heat (temperature difference) and latent heat (humidity difference) of the exhaust. This condensation effect far outperforms the direct use of outdoor air as cooling air, avoiding the energy loss caused by air conversion ventilation.

Similarly, during the heating season, 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%. The sensible heat exchange type (optional) delivers even higher efficiency.

The equipment directly processes fresh air introduced from outside and discharges indoor polluted air — caused by human activity and building materials — outdoors. Fresh air supply and exhaust use independent channels. Air-isolation heat exchange meets control and regulation requirements while ensuring absolute air freshness and 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 is needed, making the energy-saving effect more pronounced. When temperature meets design requirements but humidity does not, only fresh air treatment is required 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 fans and pumps significantly reduces initial project investment and delivers higher efficiency. The evaporative condensing unit adopts tubular evaporative condensing technology, fully utilizing water film evaporation 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 ℃ higher, and there is no need for secondary chilled water heat exchange to transfer cooling capacity. The refrigeration energy efficiency ratio is increased by more than 30%.

The unit features 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-diagnostics. 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.