Patterson-Kelley P-K STORM ST-1250 Installation & Owner's Manual page 20

Mark Description
Clearance to each side of center line
A
extended above meter/regulator
B Clearance to service regulator vent outlet
Clearance above grade, porch, deck,
C
veranda, or balcony
Clearance to window or door that may be
D
opened
Clearance to non-mechanical air supply inlet
E to building or the combustion air inlet to any
other appliance
F Clearance to a mechanical air supply inlet
For clearances not specified maintain clearance in accordance with local installation codes and the requirements of the gas supplier
Interior Component Clearances
All vent system components shall be installed so as to maintain the following minimum clearances:
Material
Unlisted single wall metal pipe
Single wall PVC pipe
UL 1738 listed Category IV vent
Flue Connection
The connection from the appliance to the vent should be as direct as possible and the upward slope of
any horizontal breaching should be at least 1/4 inch per linear foot. Examples of the complete exhaust
system with drain is in 3.5. The appliance connector should incorporate provisions to drain condensate
formed in the vent system. The connector should include an appropriate drain section (not provided).
Revised: October 2, 2019
Released: October 2, 2019
US Installations
12 in
4 ft. (1.2 m) below or to side
of opening
1 ft. (300 mm) above
opening
4 ft. (1.2 m) below or to side
of opening
1 ft. (300 mm) above
opening
3 ft. (91 cm) above if within
10 ft. (3 m) horizontally
Combustible
Do NOT Use
Do NOT Use
Per manufacturer's listing
 Patterson-Kelley 2019
All Rights Reserved.
P-K Storm TM Gas Fired Boiler
Technical Service 1.877.728.5351
Canadian Installations
3 ft. (91 cm) within a height of 15 ft. (4.6
m) above the meter/regulator assembly
3 ft. (91 cm)
6 in (15 cm) for appliances ≤ 10,000
Btuh (3 kW)
12 in (30 cm) for appliances > 10,000
Btuh (3 kW) and ≤ 100,000 Btuh (30
kW)
36 in (91 cm) for appliances > 100,000
Btuh (30 kW)
6 in (15 cm) for appliances ≤ 10,000
Btuh (3 kW)
12 in (30 cm) for appliances > 10,000
Btuh (3 kW) and ≤ 100,000 Btuh (30
kW)
36 in (91 cm) for appliances > 100,000
Btuh (30 kW)
6 feet (1.83 m)
Non-Combustibles
Do NOT Use
Do NOT Use
Per manufacturer's listing
2691000099 P-K Storm Installation and Owners
Manual.docx
Page 11