Product review (1 stars): The Aprilaire 35 is too thin to be a replacement ...
The Aprilaire 35 is too thin to be a replacement for the 700 model. I put four paint sticks along the two upright edges to act as fillers. That didn't work. I now have spent over $600 in furnace electrical repairs. I believe it is due to the leaky filter unit I have in it now. The original thicker filter never leaked.