I have a hewescraft with bulkhead and my espar is mounted at the far back starboard side of the cabin. Previous owner was good at welding aluminum and made a nice bracket and heat shield for it. in a perfect world the metering pump would be outside but its a tin boat so unless it's floating in mid air you hear it everywhere. When i bought it the previous owner just piped a 60 mm hose to one vent on the starboard side windshield, that worked ok but i upgraded it last winter and added another vent on the port side. The hose is more expensive than unicorn tears if you buy the espar stuff so i just bought aluminum dryer vent 75mm and it works amazing. Now i run a pipe from aft starbord cabin to the front port for the second vent, and the cabin heats up so much faster, it used to run forever on boost now it cuts down way quicker. should have done this upgrade 5 years ago...