Holtop DC DX Air Handling Unit includes DC Inverter DX air conditioner outdoor unit and constant frequency DX air conditioner outdoor unit these two series. The capacity of DC inverter DX AHU is 10-20P, while the capacity of constant frequency DX AHU is 5-18P. On the basis of constant frequency DX AHU, the newly developed DC inverter DX AHU adopts the enhanced vapor injection technology to open a new era of low-temperature heating. The new design of air-conditioning system and self-developed control program give full play to product performance and bring users a more comfortable air-conditioning experience.
| Item/Series | DC Inverter Series | Constant Frequency Series | ||
| Cooling capacity (kw) | 25 - 509 | 12 - 420 | ||
| Heating Capacity (kw) | 28 - 569 | 18 - 480 | ||
| Airflow (m3/h) | 5500 - 95000 | 2500 - 80000 | ||
| Frequency Range of Compressor (Hz) | 20 - 120 | / | ||
| Max. length of Pipe (m) | 70 | 50 | ||
| Max. Drop (m) | 25 | 25 | ||
| Operating Range | Cooling | Outdoor DB temperature (°C) | -5-52 | 15 - 43 |
| Indoor WB temperature (°C) | 15 - 24 | 15 - 23 | ||
| Heating | Indoor DB temperature (°C) | 15 - 27 | 10-27 | |
| Outdoor WB temperature (°C) | -20 - 27 | -10-15 | ||
Indoor Unit
1. Heat exchanger: There are cross-flow total heat exchangers, cross-flow plate heat exchangers or rotary heat exchangers to choose from to meet the different needs of customers.
3. Indoor formaldehyde removal solution The indoor unit can be added with a formaldehyde removal module to effectively filter and decompose formaldehyde molecules; coupled with the replacement and dilution of heat exchangers and filters, double removal of formaldehyde. 
4. Bring fresh outdoor air With this AHU, fresh outdoor air will be brought into the room. By increasing the oxygen concentration, reducing carbon dioxide, removing odors and other harmful gases, the indoor air quality is greatly improved.
Outdoor Unit
STRUCTURAL FEATURES OF THE TOP DISCHARGE OUTDOOR UNIT
STRUCTURAL FEATURES OF SIDE DISCHARGE OUTDOOR UNIT
