I did and My friend did
I own a 28 and bought a unit from flagship air and installed it in my hanging locker in my aft berth.After I did that,a friend of mine who has a 28.5 also bought a flagship unit.He installed his under the V berth,right under the front.He ran the discharge out the side under the V.I'll try and find out for you where he ran the Intake but I think he used the Through hull where the sink is.If you send me and email,I'll find out and email you back.Mine is paiscool@aol.com.