Installation manual
15 
VENTING          
#800-WPT WALL PASS-THRU 
12-1/2” (318mm) HIGH x 10-7/8” (276mm) WIDE 
A.  Measure wall thickness; cut insulation panel (included) this length. 
B.  Install wall pass-thru section marked #1 (3/8” (10mm) flange) into framed opening. Secure to interior wall with screws (not provided). 
C.  From the exterior, place insulation between flange and top of framed opening in wall pass-thru section #1. 
D.  Install wall pass-thru section marked #2 into framed opening, overlapping metal sections as necessary to accommodate wall thickness. 
Secure to exterior wall with screws (not provided). 
FRAMING DIMENSIONS FOR #800-WPT KOZY HEAT WALL PASS-THRU 
IMPORTANT 
#800-WPT or #800-WPT2 Wall Pass-Thru must be used on all horizontal vent terminations using 5” x 8” venting.  
This  includes  both  interior  and  exterior  walls.    Follow  instructions below.  If  venting  requires  a  8”  x  6 -5/8”  Decreaser,  
follow vent pipe manufacturer’s installation instructions for their wall thimble. 
WARNING 
MAINTAIN ALL CLEARANCES AS STATED IN THIS INSTALLATION MANUAL. 
IMPORTANT 
If using Kozy Heat series flexible vent system, remove inner ring on each wall thimble section with a tin snips. This will provide 
adequate room for the flexible vent system. 
CUT RING OUT OF BOTH SECTIONS IF INSTALLING 
 #800-1 SERIES FLEX VENTING. 
INSULATION 
HEAT SHIELD MUST BE FLUSH 
WITH WALL PASS -THRU. 
3/8” (10mm) FLANGE MUST  
BE ON INSIDE WALL. 
Figure 15a 










