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VENTING & AIR INLET PIPING

A. GENERAL

1. Install the

ure

ire

boiler venting system in

accordance with these instructions and with the National

Fuel Gas Code, ANSI Z223.1/NFPA 54, CAN/CGA

B149, and/or applicable provisions of local building

codes.

2. The

ure

ire

boiler is approved for positive

pressure exhaust venting using either indoor air or

air piped from outside. It is ETL Listed as a Category

IV (Positive Pressure, Condensing Exhaust Vent)

Appliance.

B. APPROVED MATERIALS

1. Table 3.1 lists approved materials for vent pipe (and

adhesives where applicable). Use only these materials

for exhaust vent piping.

2. PVC Pipe and fittings are not to be used for exhaust

venting in confined spaces such as closet or alcove

installations or vent pipe that passes through attics.

3. Table 3.2 lists appropriate materials for air inlet

piping. Air inlet piping is to be sealed suitably to

prevent introduction of dirt, chemicals or other

contaminants to the inlet air stream.

4. Use of cellular core PVC (ASTM F891), cellular core

CPVC, or Radel

(polyphenolsulfone) in venting

systems shall be prohibited. Covering non-metallic

vent pipe and fittings with thermal insulation shall be

prohibited.

* PVC pipe/fittings are not to be used for venting within

confined spaces.

Notice: Installations in Canada require compliance with

ULC S636 - Standard for Type BH Gas Venting Systems.

C. EXHAUST VENT/AIR INTAKE PIPE

LOCATION

1. Install vent piping before installing water, fuel,

or condensate piping. Working from largest to

smallest diameter reduces the complexity of piping

interferences.

2. Vent and air intake piping is to be installed so that

there is sufficient access for routine inspection as

required in Section 11, of this manual.

3. The vent piping for this boiler is approved for zero

clearance to combustible construction. However, a

fire stop must be used where the vent pipe penetrates

walls or ceilings.

3. VENTING & AIR INLET PIPING

The venting system for this product is to be installed
in strict accordance with these venting instructions.
Failure to install the vent system properly may result in
severe personal injury, death or major property damage.

WARNING

This vent system operates under positive pressure.
Vent connectors serving appliances vented by
natural draft shall not be connected into any portion
of this venting system. Failure to comply may result
in serious injury, death or major property damage.

WARNING

Only the materials listed below are approved for use
with the

ure

ire

boiler. Use only these components

in accordance with these instructions. Failure to
use the correct material may result in serious injury,
death, or major property damage.

WARNING

This appliance uses a positive pressure venting
system. All joins must be sealed completely to
prevent leakage of flue products into occupied
spaces. Failure to do this may result in severe
personal injury, death or major property damage.

WARNING

Use of cellular core pipe for any exhaust vent
component is prohibited. Use of cellular core pipe
may result in severe personal injury, death, or major
property damage.

WARNING

Table 3.1: Approved Materials for Exhaust Vent Pipe

Description

Material

Conforming to

Standard

Exhaust

Vent Piping

& Fittings

PVC (Sch 40 or 80)

ANSI/ASTM D1785

CPVC (Sch 40 or 80)