Quest MERV 13 Replacement Filter for Dual 105, 155, 165, 205, 225 and 155 50-Hz - 19.5 x 15.5 x 1.75 ARCS and the material arrives clean

and the material arrives clean

1 pH accuracy at 25°C

and evaporative cooling applications

This bag is 20" x 20" x 40" - enough space for almost anything you need

Included with the filter are two pre-filters that catch larger particles to maintain efficiency and prolong the life of the carbon

Quest MERV 13 Replacement Filter for Dual 105, 155, 165, 205, 225 and 155 50-Hz - 19.5 x 15.5 x 1.75 ARCS and the material arrives cleanQuest Dual MERV 13 Filter: the Finer Grade for the Same Slot Quest part 4039391 is a pleated MERV 13 panel cut to the Dual overhead's filter opening. Nothing about the unit or the install changes. What changes is the media. The EPA holds MERV 13 to 50 percent or better capture from 0. 3 to 1 micron. MERV 11 is only held to 20 percent on that same band. It is where mold spores travel. Quest's own wording is 20 percent more effective than MERV 11 and 65