18-28-803.10.6 Clearances.

   Connectors shall have a minimum clearance to combustibles in accordance with Table 18-28-803.10.6. The clearances specified in Table 18-28-803.10.6 apply, except where the listing and labeling of an appliance specifies a different clearances, in which case the labeled clearance shall apply. The clearance to combustibles for connectors shall be reduced only in accordance with Section 18-28-308.

Table 18-28-803.10.6
Connector Clearances to Combustibles

Type of Appliance	Minimum Clearance (Inches)
Domestic-type appliances
Chimney and vent connectors
Electric and oil incinerators	18
Oil and solid fuel appliances	18
Oil appliances labeled for venting with Type L vents	9
Commercial, industrial-type appliances
Low-heat appliances
Chimney connectors
Oil and solid fuel boilers, furnaces and water heaters	18
Oil unit heaters	18
Other low-heat industrial appliances	18
Medium-heat appliances
Chimney connectors
All gas, oil and solid fuel appliances	36
High-heat appliances
Masonry or metal connectors
All gas, oil and solid fuel appliances	(As determined by the code official)

 

For SI: 1 inch = 25.4mm.