General Requirements - Category I; Masonry And Metal Chimneys; Type B Vent Systems - Delta Performance PG-25 Installation And Maintenance Manual

Venting and Combustion Air Installation
SECTION VI - Venting and Combustion
Air Installation

General Requirements - Category I

The venting system must be installed in accor-
dance with:
- NFPA 54 National Fuel Gas Code, ANSI
Z223.1.
- NFPA 211 Standard for Chimneys, Vent
and Solid Fuel Burning Appliances.
For installations in Canada the venting system
must be installed in accordance with:
- CGA / B149 Installation Code for Gas
Burning Equipment.
- Prior to installing the appliance into an
existing chimney or venting system, the
vent system should be inspected for
condition and obstructions.
WARNING
If the inspection reveals the vent system
is not safe for the intended use, it shall be
repaired, rebuilt, lined, relined or
replaced with a vent or chimney to con-
form to NFPA 211, latest edition. Failure
to conduct such an inspection and/or
repair could result in severe personal
injury, death or substantial property
damage.
- No portion of the venting system shall
extend into or pass through any circu-
lating air duct or furnace plenum.
- The gas venting system shall be
installed, in accordance with their list-
ings and the manufacturer's instruc-
tions.

Masonry and Metal Chimneys

- The NFPA code book severely limits the
installation of the PERFORMANCE into
a masonry chimney. For applications
using either interior or exterior masonry
chimney a listed, approved metal chim-
ney lining system should be used.
BEST PRACTICE
For any applications using an exterior
chimney it is recommended that an insu-
lated or stainless steel chimney lining
system be used.
NOTICE
A chimney with one or more sides
exposed to the outside of the structure is
considered to be an exterior chimney.
- The chimney shall extend at least 5 feet
above the highest connected appliance
flue collar.
- The chimney shall extend at least 3 feet
above the highest point where it passes
through a roof of a building and at least
2 feet higher than any portion of a
building within a horizontal distance of
10 feet.

Type B Vent Systems

- The vent system should terminate in
accordance with NFPA 54, latest edi-
tion, provided the termination is at least
8 feet from a vertical wall or similar
obstruction.
BEST PRACTICE
The Type B vent system shall extend in a
general vertical direction with offsets not
exceeding 45 degrees.
having not more than one 60 degree off-
set shall be permitted. Any angle greater
than 45 degrees is considered horizontal.
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A vent system