Venting Portable A/C Unit Through Casement Windows
Build a bench to put the portable air cond. on and put wheels on the cart. have it to the height of the windows, then take some 1 inch styrofoam like they sell at home depot and cut it to shape it how you wnat the thing to cover the sides of the air unit to force then thing out the window that you cannot set the air cond. into. Just make sure you have it so the hot air travels out the window. you can then use another sheet to tape to the rest of the window and block the other part that the air unit does not cover. You only problem will be the wate that drops from the air cond. you might get a drip pan( one made out of metal or plastic and just sit the air unit into the pan on 2 in. blocks of 2X4's to keep it out of the water. you then take some pvc tubing or for that matter you can use rubber hose and attach it to the drip pan and put the other end out the window. This should work if you have 220 volts at your windows for the air unit.
Answer:
Casement windows require a unit that is taller than wide and made just for casement windows (read; more expensive). If you are talking about those "roll around" portable a/c units that have an exhaust hose for the warm air off the condenser... I came across a tenant that had replaced the casement window screen with a piece of plexi-glass. He put the plexi on with the same screen clips and some foam insulation strips around the edges. Portable unit vented through a hole he cut into the plexi. He said he first used plywood until he bought the plexi (which he bought to let in more light). , good you just need to open the window and then put a sheet of plywood over it and then cut a hole in it to shove the exhaust hose into the hole to get rid of the hot exhaust air. the ones i saw just collet the moisture into a 5 gallon water jug and you empty it when it gets full. they used ones like this, but bigger in an office building when the employees could not shut down in the main radio room and they just put the hose to the exhaust vent in the main air cond. unit. the one i saw was like the size of a motor cycle, this was a pretty good size office, and they used two of them. better than nothing. Just a note of experience with these. We bought three two years ago when we bought a house on the ocean in Massachusetts. We didn't expect to use them much and the house had casement windows so we actually cut holes through the walls and installed dryer vents to vent them. We cover the holes in the cool season. They will cool off a small room BUT they are the noisiest things I've ever heard. Imagine the noise of a window AC unit in the room with you instead of outside. The manual said to empty the condensation water every day but we found we often would empty it at bedtime and the unit would shut off during the night because it was full again. We ended up replacing three windows in the house with double hung windows and putting in regular window units. I wish we had done that to begin with. For the cost of three of these portables, three doublehung windows and three window units, somehow I think we could have figured out a way to install central AC even with the hot water baseboard heat.