my heat exchanger core idea.
i am going to cut coroplast to go in the middle then when i get the 3" duct work i am going to make some reducers for it, then mount those onto the cube and 80 mm fans.
can i plead lazy on that front.?
but yes i do see your point, if i was going to be making one that i would use for the whole house, i would make it about 150mm square, bigger fans ect, then i would look much harder for aluminum plates to use.