Updated to incorporate modern energy efficient EC motors these simple Direct Drive Air Handling Units have a neat and compact design. Access can be on the left or right hand side. Units can be internal or external (external specified at time of order.

Mini Direct Drive Unit - Duties from 0.05m³/s to 2.25m³/s
A compact and economical range of units with directly driven backward curved EC centrifugal fans. There are five standard sizes with all units the fans incorporate speed controllable via the EC motor for added flexibility. The standard unit consists of a 100mm M5 panel filter, l.p.h.w. or electric heater, direct drive centrifugal fan and flexible connectors.

Suitable for internal mounting as standard, models suitable for external mounting with inlet weather cowl are available to order.

Specification
Direct Drive Fans have backward curved centrifugal impellers factory matched to an energy efficient EC motor, statically and dynamically balanced to ISO 1940 G6.3 for smooth long life operation. All motors incorporate EC motor controls o provide fully variable speed control via a 0-10V input. Motors and electronics are protected to IP44 as a minimum and are suitable for operating in ambient conditions of up to 40°C and atmospheres up to 95% R.H.

Flexible Connectors
The Flexible Connectors are manufactured from Revertex JPT 20 with ductmate flanges to DW142.

LPHW Heater Batteries
L.P.H.W. Heater Batteries are constructed from copper tube, mechanically bonded to aluminium fins with the complete assembly housed in a galvanised steel casing. The coil headers and return bends are totally enclosed within the air handling unit casing. Flow and return connections are located on the same side of the unit and have male B.S.P. thread. L.P.H.W. Heater Batteries are pressure tested under water to 250p.s.i.

Electric Heater Batteries
Electric Heater Battery elements are constructed from Nichrome 5 spiral resistance wire surrounded by magnesium oxide powder and sheathed in stainless steel. The elements are carried on a galvanised steel frame. All electric heaters incorporate a thermal cut out device. Electrical connections are via a flush mounted terminal box on the outside of the air handling unit casing.