Venting options
I know this model can be vented to the outside, but can it be vented to the outside out the top?
Yes. Follow the instructions to take off the blower cover on the top, take out the two screws that hold the blower in place in the rear and rotate the blower so it is aiming up. Knock out the appropriate plates, mount the plate, put the two blower screws back in (in the rear) and replace the vent. There is an adapter piece that comes with the new units - this should help connect to the vent going to the outside.