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General, Venting, Requirements for installation in canada – Lochinvar Sync Condensing Boiler 1 User Manual

Page 16: Sizing

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16

Installation & Operation Manual

2

General

venting

Requirements for installation in
Canada

1. Installations must be made with a vent pipe system

certified to ULC-S636.

2. The first three (3) feet of plastic vent pipe from the

appliance flue outlet must be readily accessible for visual

inspection.
3.

The components of the certified vent system must not be

interchanged with other vent systems or unlisted

pipe/fittings.

Sizing

The SYNC boiler uses model specific combustion air
intake and vent piping sizes as detailed in Table 2A
below.

When determining equivalent combustion air and vent
length, add 5 feet for each 90° elbow and 3 feet for each
45° elbow.

EXAMPLE: 20 feet of PVC pipe + (4) 90° elbows + (2)
45° elbows + (1) concentric vent kit (CVK3003) = 49
equivalent feet of piping.

Table 2A Air Intake/Vent Piping Sizes

Increasing or decreasing combustion air or vent piping sizes is not authorized.

NOTICE

Model

Air Intake

Diameter

Air Intake

Min. Length

Air Intake

Max. Length

Vent

Diameter

Vent

Min. Length

Vent

Max. Length

Input

De-Rate per

25 feet of Vent

SB 1000

6"

12'

100'

6"

12'

100'

1.25%

SB 1300

6"

12'

50'

6"

12'

50'

2.90%

SB 1300

7"

12'

100'

7"

12'

100'

0.95%

SB 1500

6"

12'

50'

6"

12'

50'

3.30%

SB 1500

7"

12'

100'

7"

12'

100'

1.65%

Note: When using a 7" vent or air pipe, a field supplied increaser is required.