Definitions - Dunkirk DCBF-125 Installation, Operation & Maintenance Manual

Figure 5-1 - Venting Support
5 - COMBUSTION AIR AND VENT PIPING

5.3 Definitions

1.
Coaxial piping – Exhaust and air intake pipe have a
common axis.
2.
Twin Pipe – Exhaust and intake air are separate pipes,
can be terminated using single wall terminals from the
vent manufacturer or field built configuration using elbows
or tees.
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240012564 REV A, [05/15/2019]