Instinct Venting Manual

CHAPTER 1

CHAPTER 1 - PRE-INSTALLATION REQUIREMENTS

1.4. Vent/Combustion Air Equivalent

Lengths

• For all venting applications, PVC/CPVC or AL29-

4C® Stainless Steel the length must not exceed the

lengths listed in Table 2 below.

• For PVC/CPVC or AL29-4C® vent systems, reduce

the maximum allowable length for each elbow as

follows:

• 3 feet for every 45º elbow

• 5 feet for every 90º elbow

1.5. Vent Restrictions

1.5.1 2 Inch Vent System Restrictions

• The 2 inch vent system requires a 1 inch clearance

to combustibles.

• Use long sweep elbows to limit pressure drop and

to avoid excessive vent temperatures.

• In 2 inch PVC vent applications, the rst 7 equivalent

feet of the vent system must utilize CPVC material.

To avoid vent failure, the installer must use

CPVC vent material for the first 7 equivalent

feet of a 2 inch PVC vent system. The installer

must also utilize primer and glue that is cer-

tified for both PVC/CPVC materials. Failure to

comply with this requirement can cause the

venting system to fail, resulting in substantial

property damage, serious injury, or death.

WARNING

Table 2 - Maximum Allowable Vent or Combustion Air Piping Length

INSTINCT

Model

2 Inch [60 mm] Piping

3 Inch [80 mm] Piping

Feet Elbows Feet Elbows

Solo 110 33 0 100 0

Solo 155 33 0 100 0

Solo 199 N/A N/A 100 0

Combi 155 33 0 100 0

Combi 199 N/A N/A 100 0