Shop Cabinet on castors?

[Mr__Bill]

You can still attach to the door.
Build cabinet and attach to door at door handle side with hinges and a catch (loose pin hinge) on the door hinge side. When you need to open the door, release the catch and swing the cabinet out 90 deg and then open the door, cabinet should now swing to being just in front of bench and the door is open.

Bill, ever striving to find a way to make things more complicated

[LarryG]

Since they are double locking casters couldn't you lock them in place, acting as straight / non-swivel. Then once you get it out, you unlock it and turn it as needed.

Actually I was thinking the back two casters would be non-swivels, and the front two would be the double-locking jobs. Radhak mentioned a 29" width, so the cabinet I proposed would've been near enough to square that it would "drive" okay with this caster arrangement.

Radhak didn't supply any info about the inside dimensions of the closet and how much space was left around the WH and air handler. I'd no way of knowing if there was room for what I suggested until I asked.

All moot now.

[LCHIEN]

...
I don't think having a cabinet in the door way with a flange as Larry said / showed would cut off more than a door closed. Unless there is a big gap at the bottom. A cloth skirt at the bottom would help keep the dust out, and still breath for the combustion.

Some heater closet doors have louvers or gap at the bottom... easy to overlook when replacing the door as in this case, and human nature is to close the gaps when making doors. A cloth "skirt" would act as a filter and plug up with dust rapidly.

[TheRic]

Some heater closet doors have louvers or gap at the bottom... easy to overlook when replacing the door as in this case, and human nature is to close the gaps when making doors. A cloth "skirt" would act as a filter and plug up with dust rapidly.

Your right on both points, haven't seen a heater closet door in a long time but remember a louver being there now that you mention it. Maybe a screen instead of cloth. Oh well doesn't matter anymore.

[LinuxRandal]

On the issue of stability, one (or several) of the woodworking magazines had a bench design that could be modified for your setup. It was a box, that was then filled with sand, for stability. Recess the wheels a bit (towards the outsides so you still can access the locks) and it should stabilize it.