Patterson-Kelley P-K STORM ST-5000 Installation & Owner's Manual page 42

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-2500, ST-3000,
ST-3500, ST-4000
ST-5000 & ST-6000
ST-5000 & ST-6000
Revised: December 8, 2021
Released: December 8, 2021
Draft Stack Temperature
Category II
-0.01" to -0.05" W.C.
Category IV
(Sealed Combustion)
+0.01" to +0.22" W.C.
Category IV
(Exhaust Only)
+0.01" to +0.4" W.C.
Category IV
(Sealed Combustion)
+0.01" to +0.5" W.C.
Category IV
(Exhaust Only)
+0.01" to +1.0" W.C.
 Patterson-Kelley 2021
All Rights Reserved.
P-K Storm
Technical Service 1.877.728.5351
220 °F (gross)
220 °F (gross)
220 °F (gross)
220 °F (gross)
220 °F (gross)
2691000273 P-K Storm ST2500-ST6000
Installation and Owners Manual Rev C.docx
TM
Gas Fired Boiler
CO
2
Natural Gas
8.75%
8.75%
8.75%
8.75%
8.75%
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