Toilet and Shower Tray With Heating Channel with Optional Duck BoardToilet and Shower Tray With Heating Channel Designed in house, for van conversions, these shower trays are a space saver; allowing for you to pass the heating ducting down the back of the shower tray, without having to raise the shower tray or build the wall out from the side of the van, to let you get heat to the back of the van when your heater is at the front, or vice versa. We have also removed the need to cut a large hole in the side of the van