Designer Guide

5
LOCHINVAR, LLC
300 MADDOX SIMPSON PKWY
LEBANON, TN 37090
www.lochinvar.com
Designer’s Guide / Knight XL Boiler
DIRECT VENT / SIDEWALL - CATEGORY IV VENTING
PVC / CPVC WITH CONCENTRIC VENT KITS (400-601 ONLY).
The exhaust piping terminates out the sidewall. The combustion air piping
terminates out the sidewall.
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.
 The concentric vent termination is provided by
Lochinvar and all other vent material are obtained
locally.
 Maximum distance – 100 equivalent feet of vent.
 Maximum distance – 100 equivalent feet of air intake.
Model
Kit Number
Equivalent vent length
KBN 400
CVK3007
5 Feet (1.5 m)
KBN 501
CVK3007
30 Feet (9 m)
KBN 601
CVK3007
30 Feet (9 m)