CONNOLS-AIR Model NKP diffuser is constructed of electro-galvanized steel with round inlet, a adjustable dual-purpose disc and a face panel designed to provide a horizontal radial air discharge that adheres tightly to the ceiling. This feature makes the diffuser suitable for use with variable air volume system. NKP diffusers are available in two nominal sizes, 600 x 600 and 1200 x 600 mm that maximize visual continuity throughout the building space served. The diffuser blends in perfectly with the inverted tee bar ceiling, the plaster ceiling and metal panel ceiling.

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VAV system with VAV box is able to save significant amount of energy due partly to the box’s ability to operate at high turndown ratio thereby saving on cooling and fan energy. However, the VAV box cannot do it alone. The VAV box provides the minimum airflow required to maintaining the desired room temperature, however, selection of the right type of diffuser is necessary to maintain proper air distribution leading to uniformity in room temperature and air velocity and, therefore, comfort. NKP diffuser is able to provide horizontal air throw without dumping for airflow down to 50 per cent of its design maximum airflow.

The diffuser is designed for installation on inverted tee bar, plaster, and metal ceiling. As a standard the diffuser is painted in powder coated baked white enamel RAL 9010. The diffuser may be used as matching return with or without plenum.

Each supply diffuser is supplied with a circular disc-balancing damper for minor throttling. The disc damper is easily adjusted without special tool from the room side. For severe balancing, a damper should be located upstream at the duct takeoff to avoid generated noise from disc dampening.

Engineered plenum may be supplied with the diffuser internally insulated with acoustical and naturally fire retardant foam for absorption of noise from upstream devices such as the VAV box and balancing damper. Each plenum is constructed of 0.5 mm thick hot-dipped pre-galvanized steel with optional inlet damper for airflow balancing. Upon request, the plenum may be externally insulated.