Starduct Round Diffusers (louver face) have frame made of aluminum sheet grade A6063-T5 and 2-6 cores/blades made of 1.0mm aluminum sheet . Cones are jointed together by X-shape aluminum "skeleton" of the same grade that easily removed to access the OBD and other nearby parts of ducting system. Frame and blades are linked by spring latches.

Powder coating finish in RAL9010 standard colors or optional color as requested with Jotun paint or equivalent, service life over 5 years

The radial OBD is made of steel sheet, black painted, adjustable from the front of the diffuser.

Production standards : Ashrea 70:2006. ASHRAE 70-2006 Standard “Method of Testing for Rating the Performance of Air Outlets and Inlets” ADC1062: GRD-84 “Test Code for Grilles, Registers and Diffusers”.

Scope of testing: A) Sound Power Level ((NC) B) Air Volume versus Static Pressure C) Area Factor D) Throw Pattern (test report pending)