Installation / Operation Instruction Manual

8
M=
Clearance under a veranda, porch,
deck, or balcony
12 inches
(30 cm) ‡
*b
1
In accordance with the current CAN/CGA-B149 Installation Codes.
2
In accordance with the current ANSI Z223.1-(Latest edition)/NFPA 54 National Fuel Gas
Code.
† A vent shall not terminate directly above a sidewalk or paved driveway that is located
between two single-family dwellings and serves both dwellings.
‡ Permitted only if a veranda, porch, deck or balcony is fully open on a minimum of two sides
beneath the floor.
*a) A minimum clearance value determined by testing in accordance with section 5.21.1 of
ANSI Z21.10.1, latest edition.
*b) “Clearance in accordance with local installation codes and the requirements of the gas
supplier”.
The vent system must terminate so that proper clearances are maintained as
cited in local codes or the latest edition of the National Fuel Gas Code, ANSI
Z223.1.73.4e and 7.8a, b as follows:
1. Do not terminate near soffit vents or crawl space or other area where
condensate or vapor could create a nuisance or hazard or cause
property damage.
2. Do not terminate the exhaust vent terminal where condensate or vapor
could cause damage or could be detrimental to the operation of
regulators, relief valves, or other equipment.
3. Do not terminate the exhaust vent terminal over public area or walkways
where condensate or vapor can cause nuisance or hazard.
4. The vent shall terminate a minimum of 12 in (25.4 cm) above expected
snowfall level to prevent blockage of vent termination.
Vent pipes serving power vented appliances are classified by building codes as
“vent connectors”. Required clearances from combustible materials must be
provided in accordance with information in this manual under LOCATION OF
WATER HEATER and CLEARANCES, and with the National Fuel Gas Code
and local codes.
Clearance to combustibles for all venting pipes and terminals
For installations in the US
0” minimum
For installations in the CANADA
Refer to vent pipe and terminal
manufacturer’s installation instructions for
clearances to combustibles
DO NOT place insulation or other materials in the required clearance spaces
between the venting to combustible material unless otherwise specified.
NOTICE
Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel
®
(polyphenosulfone) in non-metallic venting systems is prohibited and
covering non-metallic venting with thermal insulation is prohibited.