Lennox GWB84-060E

20
7 - VENT INSTALLATION
WARNING







!
WARNING


!
7.1 Check Your Chimney



Chimney Sizing



codes.



1. 


a. 
unheated space.
b. 

2. 


a. enclosed in a chase, or
b. 

3. 
boiler and water heater.
4. 

5. 
1. 


2. 


7.2 Requirements
7.3 Chimney Inspection

and in good condition.


The National Fuel Gas Code,
7.4 Vent Pipe
• 

• 
sagging.
• 

• Vent pipe through crawl space, use double wall vent
pipe.
• 


NOTICE





listing.
3. 

National Fuel Gas Code

 Natural Fuel Gas and Propane
Installation Code

4. 





inch.
5. 




National Fuel Gas Code,







PN 240012889 Rev. A [07/31/2020]