Product review (1 stars): Did not work in my model 700
The lower quality of this replacement filter is visible, the coating was clumpy and thick.  Once installed, it failed to move the water properly, even though installed correctly, and (a lot of) water leaked out of the unit and onto the floor.  Once replaced with an OEM filter, no problem.  I used one of these previously and did not have a problem, but the coating seems to vary considerably between different panels.  I hate paying the Aprilaire prices, but not as much as I dislike mopping up my basement floor, I will buy originals from now on.