1 or 2 slot linear floor diffuser with high induction alternating jet discharge and low velocity vertical air pattern with displacement spread across the floor. Suitable for installation against facade.

	Location – below: Air supply from the floor, typically at least 200 mm from seated occupants.
	Displacement airflow: Thermal displacement room airflow, with low level, high induction alternating muliti-jet mixed flow supply for rapid discharge velocity and temperature differential decay into the occupancy microclimate. Displacement airflow spreads gently across the floor. Heat and contaminants rise by natural convection in thermal plumes to stratify at a high level. Enhanced levels of indoor air quality are attained in the breathing zone.
	VAV dependent throw: Suitable for VAV applications with limited turn-down. Throw height is dependent upon airflow rate.
	Linear face shape: Narrow profile provides linear aesthetic.
	Slot face pattern: 1 or 2 slot appearance.
	Metal Face: Powder coated steel.

Options

Plenums: Side or bottom entry connection boxes.

Airflow rate

• 14 – 50 L/s/m (50 – 180 m³/h/m)

Nominal length

• 800 mm
• 1000 mm

Face width

• 1-row: 70 mm
• 2-row: 100 mm

Discharge height

• 0 m

Features

• 1 or 2 slots
• Alternating multi-jets
• High induction multistream air pattern
• Flanged side and end profiles
• Metal finish, powder coated
• Installation flush with floor

Function

The LTG Linear Multijet Floor Diffuser, type LDU, is a 1 or 2 slot linear diffuser with alternating jet discharge to produce vertically directed low velocity multi-stream airflow along facades with displacement airflow spread across the floor.

When cooling, high induction vertical multi-stream discharge adjacent to the facade produces a strong reduction in velocity and rapid supply-to-room air temperature equalisation with throw restricted to head height of seated occupants. Facade loads are dealt with at the source. Cool supply air then gently descends to spread as displacement airflow across the floor. An occupancy micro-climate of enhanced indoor air quality is created in which convective currents from occupants and other heat sources rise upwards in thermal displacement plumes. Heat and contaminants stratify in conentrated form at a high level, where they are removed from the space. High levels of indoor air quality and comfort are achieved.

Due to stratification of heat, relatively large supply-to-return temperature differentials are achievable – dependent upon ceiling height – despite the relatively high supply air temperature (typically 18°C), thereby minimising fan energy. Energy savings also accrue from the extended free cooling range often achieved by the elevated supply air temperature, as well as from the potential to reduce outdoor airflow rates due to the enhanced indoor air quality of the occupancy micro-climate.

High induction floor level discharge ensures extremely effective heating performance, due to cool room air, which pools above the floor, being scavanged by the diffuser’s high aspiration, whilst thorough mixing diffuses the warm supply air into the occupancy space.