Designer Guide

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LOCHINVAR, LLC
300 MADDOX SIMPSON PKWY
LEBANON, TN 37090
www.lochinvar.com
Designer’s Guide / Knight XL Boiler
DIRECT VENT / VERTICAL - CATEGORY IV VENTING
STAINLESS STEEL WITH TWO PIPE TERMINATION.
The exhaust piping terminates on the rooftop. The combustion air piping
terminates through the rooftop.
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.
 Maximum distance – 100 equivalent feet of air intake.