DBA-UTC55 (Ultra Thin)

The body is only 20 to 31 cm deep and sits above the false ceiling, installed the same way as a ducted air conditioner. All that shows in the room are a few supply grilles and a return grille. Where ceiling depth is tight, a wall-mounted model does the same job.

A single unit supports multiple supply outlets. In a home it sits above the corridor, with one outlet in the living room and one in each bedroom. In an office, clinic or hotel it can cover several rooms, or an entire floor.

Once an air conditioner reaches its set temperature the compressor slows or stops, and moisture removal stops with it. That is why a fully air-conditioned space still tends to sit at 65 to 75% RH. Keeping a whole site dry that way means every unit in every zone running all day. A ceiling dehumidifier uses around a quarter of the energy and holds the space steady at 50 to 60%.

A floor-standing unit has to be opened up and emptied every time the tank fills, which is both time-consuming and physical work. The ceiling unit's built-in pump lifts condensate up to 1.8 m and clears it through a drain line automatically. If drainage fails and the internal drain pan fills, the unit stops on its own. For an extra layer of protection, a leak-detection cable can be wired to the unit's input, and water anywhere along its length stops the unit immediately.

Inside are a horizontal compressor, a fan motor running on Japanese NSK bearings, and several layers of vibration isolation. On low fan speed there is little more than the sound of moving air, much like a ducted air conditioner. It suits spaces where noise matters, and keeps running right through trading or teaching hours. A UV-C lamp eliminates 99.9% of airborne bacteria and viruses, and the stainless steel filter washes out and goes straight back in.

The wall-mounted LCD panel shows current humidity and temperature at all times. Set the target humidity, fan speed and schedule once, and the unit starts and stops on its own with nothing further to do. The Tuya Smart app handles remote monitoring and adjustment. For projects, an RS485 Modbus port and dry contacts allow integration with a BMS or PLC, and shutdown via the fire alarm system. On multi-unit sites, every unit can be viewed from a single interface.