[DKAudio]

I don't need one but found a Bosch Aquastar (4.6 GPM) for $300, it has been mounted but is pretty much new. I was wondering how hard these are to install? My vent for the water heater is connected to the same one as my furnace. It is in the middle of my basement going straight up through the roof. I want to mount the tankless heater on the wall to get it out of the way. What are my options for venting this thing? Anything I should know about them? Your replies will determin if I am going to buy it or not. Thanks