Diesel Heater Ducting
Diesel heater ducting carries the warm air from the heater to where you want it. Match the duct to your heater's outlet: most 2kW heaters use 60mm and most 5kW and 8kW heaters use 75mm, while 42mm is for small vents and inlets.
Keep duct runs short and with few bends, and insulate ducting that passes through cold spaces. Add a vent or louvre at the end and a tee if you want to split the heat.