Etl listed these fans are available in duct sizes from 4 in.
High cfm duct fan.
144 378 4 6 dia 5 year warranty price.
138 82 soler palau usa brand gravity damper for model sqd square inline direct drive centrifugal duct fan.
Canarm belt drive axial duct fan 18in 4 110 cfm 3 phase 230 460 volts model bta18t30050m not yet rated only 1179.
Aerodynamic design allowing more air flow.
Ipower glfanxbooster8 a 8 inch 420 cfm inline duct vent blower booster fan for hvac exhaust and intake 5 5 grounded power cord low noise 8 4 0 out of 5 stars 73 31 98 31.
All vtx models come with galvanized mounting brackets allowing either horizontal or vertical installation.
Turbo tube pro series high powered inline duct fan cfm range.
The vtx models range from 175 cfm to 1140 cfm and the v series models range from 2050 cfm to 4515 cfm.