Patterson-Kelley P-K STORM ST-8000 Installation And Owner's Manual page 44

Vent Sizing
The vent must be sized in accordance with the ASHRAE Systems and Equipment handbook, Chapter
30 or according to the vent manufacturer's recommendations. When using manufactured venting
systems, consult your vent supplier for correct sizing and structural support requirements. See the
table below table for vent design parameters.
®
P-K STORM Boiler Model
ST-2500, ST-3000,
ST-3500, ST-4000
ST-2500, ST-3000,
ST-3500, ST-4000
ST-5000, ST-6000,
ST-8000
If the combustion air intake ductwork and the exhaust vent terminate on the same wall of the
NOTE:
building, they must utilize the same type of termination fitting.
Patterson-Kelley recommends including a motorized combustion air damper in each
NOTE:
appliance's air intake ductwork. Refer to
NOTE: ST-2500-ST-4000: Total combined vent pressure not to exceed 0.44" W.C.
ST-5000-ST-8000: Total combined vent pressure not to exceed 1.0" W.C.
Revised: February 2, 2024
Released: February 2, 2024
Draft Stack Temperature
Category II
-0.01" to -0.05" W.C.
Category IV
+0.01" to +0.44" W.C.
Category IV
+0.01" to +1.0" W.C.
3.4.3 below for
 Patterson-Kelley 2024
All Rights Reserved.
P-K Storm
Technical Service 1.877.728.5351
220 °F (gross)
220 °F (gross)
220 °F (gross)
more information.
2691000403 P-K Storm ST2500-ST8000
Installation and Owners Manual Rev G.docx
®
Gas Fired Boiler
CO
2
Natural Gas
8.75%
8.75%
8.75%
Page 33