Carrier F96CTN - Ble

F96CTN and G96CTN (Series A): Installation, Start-up, Operating, Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
40
A10497
Fig. 51 – Vent Terminations for Ventilated Combustion Air
Table 12 – Maximum Allowable Exposed Vent Lengths Insulation Table
Maximum Allowable Exposed Vent Length in Unconditioned Space - Ft.
Winter
Design
Temp
°F
Unit Size
40,000* BTUH 60,000 BTUH
Uninsulated
3/8-in.
Insulation
1/2-in.
Insulation
Uninsulated 3/8-in. Insulation 1/2-in. Insulation
Pipe Dia.
in.
1 ½ 2 2 ½ 1 ½ 2 2 ½ 1 ½ 2 2 ½ 1 ½ 2 2 ½ 3 1 ½ 2 2 ½ 3 1 ½ 2 2 ½ 3
20 20 20 20 20 50 45 20 60 50 20 30 30 25 20 75 65 60 20 85 75 65
0 10 5 5 20 25 20 20 30 25 15 15 10 10 20 40 30 25 20 45 40 30
-20 5
20 15 10 20 20 15 10 5 20 25 20 15 20 30 25 20
-40
15 10 5 15 15 10 5 20 15 15 10 20 20 15 10
3” (76 mm)
12” (305 mm)
Pipe hangar
Ventilated Combustion Air
intake termination in crawl
space
Ventilated Combustion
Air intake pipe
CRAWL SPACE
ATTIC
highest level of insulation