Size of filter box under furnace

[danglerb]

Looking at a York PV8 furnace not 100% sure if a A size or B size cabinet (14.5" vs 17.5") and noticed last night that it comes with a cheesy old fuzzy thing filter, so I am planning on having the contractor add a filter box to the bid.

York looks a LOT like the Honeywell with same model numbers etc. F100F, and I also looked at Aprilaire, does brand matter much?

My closet door width is 19 3/4, widens inside a few inches to 23", and I would like to use the largest filter size practical, which in Honeywell/York is 16x25 and 20x25. It isn't clear enough in the picture to see if the just the pull out part is slightly narrower so that it would fit through the closet door?

[flick]

If space is an issue, and you want good filter system. Try the Trion right angle Air Bear. Not so taxing on space. Pulls from the front. Doesn't bump your return drop so far from furnace. It uses the 20 X 25 X 5

[danglerb]

Humbug, more quality flashlight and tape measure time. My closet door is just a hair less than a full 20" wide at the bottom, but the material isn't wood, its that cheesy metal stuff that goes right over drywall. Worse, I paid more attention this time and noticed my lineset comes out of the plywood platform the furnace sets on and cuts off about 2" of the width, so 16" looks like best I can hope for, unless the lineset gets wiggled all the way to the side (new hole, widen etc.).

My upstairs return is directly under the furnace platform, so I had a moment of wow maybe I could access the filter from the bottom side of the plywood, but phoo, nice looking wide grille, with a good 4" on each side showing wall, not opening, so actual access width is maybe 16" or 18".

Back to keeping it simple.

[flick]

If you have the head room, set it on a metal box with filter rack built in to accomidate size of filter. Wouldn't need much of a box.

[danglerb]

I'm not sure I follow you, let me clarify my end.

73 3/4" tall x 55" deep (inside the closet) with maybe ductwork in the back part of that 55". Opening is 19 3/4" wide x 65" tall, with another 2 1/2" if a top trim bit is removed, and bottom of opening is flush with the platform. Below the plywood platform is an open area that has openings for the return air, but no real ductwork.

Airflow is bottom to top, and everything would be stacked, filter box on the bottom, then furnace, with evaporator on top (but maybe going in second.

Contractor says it all fits, but to get tier 2 energystar he had to find a funky coil, CAP4817A, 17" wide and 35" tall.