1800B furnace can be replaced with either paraffin oil (USA: cerosine) or diesel oil operated furnace. The 1800B has 2x90 mm warm air ducting and 60/43 mm exhaust piping. The replacement devices have different dimensions in the ductings and pipings. You need to have new exhaust pipes and with the new exhaust fittings and warm air ductings you need various adapters. The tables below show which adapters are needed in various installations.

When changing the deck exhaust fitting to hull exhaust fitting 2467, the hole in the deck will be covered with plate 2464 and the exhaust fitting adapter is not needed.