You can use the new FA-430 fume extraction Main Filter (PN: A1586) in your HJ3100 unit with the new Hakko Filter Adapter Frame (PN: 999-241).
Dimensions: 270 x 220 x 125mm
Weight: 1350g
Max suction capacity: 4.1m3/min (145cfm) with single duct, 4.7m3/min (167 cfm) with two duct
Filtering efficiency: Filters 98% of particles 0.3µm