(1) Every unit heater using either steam or hot water as the heating medium shall be installed such that the clearances between the appliance and adjacent combustible material conform to Table 6.2.9.3.
Tables & Figures referenced
Table 6.2.9.3 : Clearance Between Steam or Hot Water Pipes and Combustible Material : Forming Part of Sentences 6.2.7.1.(1), 6.2.8.1.(2) and 6.2.9.3.(1)