Exhaust flue clearances

Heating · Oil Furnaces · printed page 141 (PDF page 142)

Book index entries

Clearance – for Exhaust Flues on Oil Furnaces Exhaust Flue – Clearances for Oil Furnace Exhaust Flue Clearances Oil Furnace – Clearances

Text in the illustration

exhaust flue cross section
cold air return
hot air supply
oil furnace
the required clearance to combustible materials for single wall oil furnace exhaust flues is 9" to 18" (depending on the appliance)

Generated explanation

The illustration shows an oil furnace with a cold-air return duct, hot-air supply duct, and an exhaust flue extending toward a wall. The single-wall flue rises through elbows from the furnace and continues horizontally to the wall connection. A cross-section inset and dashed circle indicate the clearance zone around the flue. The annotation specifies a required clearance to combustible materials of 9 to 18 inches, depending on the appliance.

Components

oil furnace single-wall exhaust flue flue elbows cold-air return duct hot-air supply duct oil burner wall floor

Materials

metal flue pipe sheet metal ductwork

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