Designer Guide

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LOCHINVAR, LLC
300 MADDOX SIMPSON PKWY
LEBANON, TN 37090
www.lochinvar.com
Designer’s Guide / Knight XL Boiler
ROOFTOP VENT WITH ROOM AIR OR SIDEWALL AIR - CATEGORY IV
PVC / CPVC OR STAINLESS STEEL VENT WITH AIR FROM THE
EQUIPMENT ROOM OR FROM DIFFERENT PRESSURE ZONES.
The exhaust piping terminates on the rooftop. The combustion air is
drawn from the equipment room or from a sidewall termination.
BULLET POINTS
 This is Category IV venting, positive pressure,
condensing stack.
 All joints and seams must be sealed gastight
and may not be common vented.
 All the vent material for this configuration will be
obtained locally, including the terminations.
 Maximum distance – 100 equivalent feet of vent.
IF PLANNING TO USE ROOM AIR, REMEMBER TO ORDER KIT30022, OPTIONAL AIR FILTER BOX.
Tip
PVC/CPVC
Reference Drawing A1 – Page ??
Stainless Steel