Tjernlund AS2 AireShare Room to Room Transfer Fan with Multiple Speeds,130 CFM
Brand: Tjernlund
Can effectively add comfort to rooms up to 275 sq. ft
Fan, grille, diffuser and speed capacitors all included
Can be permanently set at 3 speeds up to 110 CFM and as quiet as 1 sone (nearly silent)
Fits between standard 2"x4" or 2"x3" wall construction, 16" on center. No ducting required
Transfer air through interior walls from room to room