Exhaust flue length

Plumbing · Oil Tanks, Burners and Venting · printed page 277 (PDF page 278)

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Book index entries

Exhaust Flue – Length for Oil Water Heater Exhaust Flue Length for Oil Water Heater Plumbing

Text in the illustration

an elbow is equivalent to about 10' of straight flue
general rule:
maximum flue length should be 10' plus two elbows
oil water heater
side view

Generated explanation

The side-view illustration shows an oil-fired water heater with a burner mounted near its base and an exhaust flue connected near its top. The flue runs toward the wall through two elbows, a vertical section, and a horizontal section. An annotation states that an elbow is equivalent to about 10 feet of straight flue, and a general-rule note gives a maximum flue length of 10 feet plus two elbows. Two water pipes extend above the tank, with red and blue arrows indicating outgoing hot water and incoming cold water; a shutoff valve is shown on the cold-water pipe.

Components

oil-fired water heater oil burner exhaust flue connector flue elbows hot-water outlet pipe cold-water supply pipe cold-water shutoff valve

Materials

metal flue pipe metal water heater jacket

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