Low static ESP ducted single/double skin fan coil


The Polar Air low ESP ducted single and double skin fan coil units have been specifically designed to meet demanding market expectations.


The Polar Air low ESP ducted single and double skin fan coil units have been specifically designed to meet demanding market expectations. The PDWSS model is single skin for ceiling concealed applications with a 25mm filter and duct connection flange. The PDWSD model is double skin for ceiling concealed applications with 20mm thickness casing, 25mm filter and duct flange.


Product Range

The Polar Air Low ESP ducted Single and double skin fan coil have a range of AC and EC motor 230V/50Hz units with the following capacities.

  • 13 sizes of 2 pipe 3 row model from 2.82kW to 26.9kW (9600 BTU/H) cooling capacity and 2.81kW to 26.88kW (9600 BTU/H to 91700 BTU/H) heating capacity
  • 2 pipe models 4 row also available
  • 4 pipe models available by adding an auxiliary heating coil (3+1)
  • Variable external static pressures (ESP) up to 150 Pa (0.6 in wg)

The ducted low series offer a standard 25mm filter nylon net filter and drain pan with 3/4’’ male pipe thread (MPT) galvanised drain connection.

Product Accessories

Control Accessories

  • Infrared handset controller and wall holder
  • ABS external led receiver
  • Unlimited wired wall pad controller
  • DIP switch configuration service
  • Universal EC thermostat
  • STCD Series thermostats

Other Accessories

  • Electrical heaters
  • Valves and valve kits
  • Optional stainless-steel brainpan


The PDWSS model Single Skin: 1mm galvanised steel with 10mm insulation.

The PDWSD Double Skin: Sandwich panel with two inner high pressure PU foam insulated walls. Inner wall is made of plane galvanised 0.8mm steel, and the outer wall made of pre coated 1.0mm steel.

Water Coils

Built with seamless copper tubes and headers, mechanically expanded into corrugated aluminium fin material for a permanent primary to secondary surface bond. Tested at 35 bar with maximum operating limits at 20 bar.

Fan Blowers

The fan blowers are made from heavy gauge galvanised steel with die-formed inlet cones housings, inlet forward curved centrifugal type, statically and dynamically balanced for smooth and quiet operation.


  • EC motors including driven controls PCB
  • Constant torque
  • Permanent magnet
  • 3 speed pre-set to allow precise air balancing
  • AC 3 speed motors are PSC and are permanently lubricated type with internal thermal overload protection


Easily removable and washable filters made from self-extinguishing acrylic with EU2 (G2) (Merv 2-4) efficiency class. G4 (Merv 8) efficiency filters are optional.

Condensate Pans

Single wall painted steel drain pan and an outer wall lined with 5mm NBR insulation.


Selectable left or right side water connections.


  • Designed to prevent air leakage between casing and joint covers
  • Optimised forward curved metal centrifugal fans
  • Water circuit designs to guarantee utmost performance and low water pressure drops

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