The filters do not get all the grease. I have a Jenn - Air downdraft at my presnt - and former homes. Both piping systems drip grease from me not sealing them when I or the former owner here installed them. :BangHead:
I believe code allows maximum of 25 feet of pipe to vent a dryer and I'm not sure about an exhaust hood. You must also allow a deduct of 5 feet for every 90 degree elbow you use.
You will probably end up enlarging the outside flapper. If you use an indoor dryer recovery system, you may be able to get an HVAC contractor to make you a box that will accept the smallest available furnace filter to catch any lint. It should have a boot on one side to attach the dryer hose.
You must also consider what you will be doing in the summertime. You will be adding moisture and heat into the conditioned space causing the A/C to work harder to cool the apartment.
MTCW
These are GUYS remember, you don't think there're going to be doing laundry do you:rotflm: