Model naming instructions 1."HW-" stands for the abbreviation of the company name (positions in grid 1-3) 2. Fan type (F represents a forward tilt fan, B represents a backward tilt fan, A represents an axial flow fan, and C represents a cross flow fan) (positions in grid 4) 3. Outer diameter dimension of impeller (position in grid 5-7) 4. Impeller height dimension (position in grid 8-10) 5. Motor code (D for DC motors, E for EC motors, A for AC motors) (position in grid 11) 6. Voltage code (positions in grid 12-14) |