The FT Series Heating Only, Boiler
Page 27
2. Provide two openings to allow for circulation of
combustion air as specied by ANSI Z224.1/NFPA 54.
In Canada refer to CAN/CSA B-149.1
NOTE: The FT needs fresh air for safe operation and must
be installed so there are provisions for adequate
combustion and ventilation air.
Model FTHW100 FTHW140 FTHW199
Maximum Input (BTU/H) 100,000 140,000 199,000
Indoor make up air is provided,
a minimum free area of 1 in
2
per 1,000 BTU/H
100 in
2
13 1/4˝
(W) x 13 1/4˝ (H)
140 in
2
13 1/4˝
(W) x 13 1/4˝ (H)
199 in
2
13 1/4˝
(W) x 13 1/4˝ (H)
Table 6. Adequate Free Area
4.7.3 Indoor Combustion Air
Read and Follow Sections 4.3 Guidelines First.
1. Insert the termination end cap into the intake air duct.
Vertical Vent Termination
• Direct Vent - Vertical Terminations
with Sloped Roof
All Terminations:
• After connecting terminals, install vent screens on both the vent and air inlet.
Two 3” vent screens are included with each unit. Additional replacement screens are available for purchase.
2” Vent Screen P/N - FT1508
3” Vent Screen P/N - FT1730
Vent Screens
are required
4.8 Vent / Air Pipe Termination