Heatilator RAVE4013I-C Owner's Manual page 21

3-1/2 IN.
NON-COMBUSTIBLE
BOARD SHIPPED
WITH APPLIANCE
1 IN.
1 IN.
AIR SPACE
Figure 5.8 Non-Combustible Zone
Heatilator • RAVE4013I-C • 2293-900 Rev. i • 4/14 21