Retrotec Comparison between Duct Blaster and Retrotec DucTester 341 - Manual (Page 2)

SP803 Page 2 of 5 rev-2014-09-14
Duct Blaster ® Series B Model 341 DucTester
Four included flow ranges measure from 10 to 650 CFM*
at negative pressure which sucks register seals into place.
Optional Ring 4 for $85 to measures down to 2.4 CFM.
*Flow in Depressurization requires the flow conditioner which
limits flow to 650 CFM.
Four flow ranges are included for flows from 2.7 to 800
CFM in depressurization. Optional ranges go down to
0.005 CFM for $125 each.
Change ranges on the Duct Blaster by forcing the
U-shaped molding over the Range Ring and fan
body all the way round. ...and on the DucTester by snapping range plate
or plugs into place.