How small rmh to be able to vent thru window akin to air conditioning unit

How small rmh to be able to vent thru window akin to air  conditioning unit?

I've searched the forums and don't see a simular idea or discussion about the pro/cons. Point me to it if it exists please!

The idea is a small rmh that is able to be broken down into pieces to move as our life needs change. I imagine 4 or 5 pieces that are mortared together with the idea that they have fault lines that can be broken apart predictable. ... cleaned up and then reassembled. .

Then also, is it possible that it could be sized that it would be feasible to have a couple inch opening of a window for both the intake and exhaust. ..?

Am I dreaming impossible dreams?

What size is feasible!

Thoughts?  Experiences?

Thankee!

I am not sure size is an issue.
You don't need an outside air intake,and a even a 8" rocket exhaust could pass through most windows with room to spare.
The opening around the exhaust should be closed off with something non-flammable,like sheet metal.

Mass will probably be more of an issue.
Minimum structural changes, minimum foot print, transportable, all point to a relatively small mass.
Since a mass can only be charged so much, there is little point in a large rocket.
I would build a 6" J-tube,or 4" batch box rocket for your application.
Ian told that things get tricky any smaller than that.