21. Horizontal inline engines are quite common in industrial applications such as underfloor mounting for buses. 22. Underfloor with 30 mm high skid block.23. The underfloor space is often screened with lattice and used for storage or a carport. 24. The fuel, gaseous Hydrogen, is stored in underfloor hydrogen tanks at 350 bar. 25. Warm air came through underfloor ducts from a coke-fired stove beneath the church. 26. The E7 is based on the Peugeot Expert and has a sliding underfloor wheelchair ramp. 27. The Street also features underfloor heating, three vending machines, lockers, and watercoolers. 28. Later models were equipped with underfloor heaters; the first heated tramcars on the continent. 29. Heating was provided by means of a hypocaust, an underfloor heating system of pipes. 30. An underfloor heating system was installed.