Allied Air A80DS2V Installation Instructions Manual page 16

Warm air gas furnace variable speed downflow air discharge

Table of Contents

Capacity of Type B Double Wall Vents with Single-Wall Metal Connectors

Serving a Single Category I Appliance

NOTE: Single appliance venting configurations with zero lateral lengths are assumed to have no elbows in the vent system. For all other vent

configurations, the vent system is assumed to have two 90 ° elbows. For each additional 90° elbow or equivalent (for example two 45° elbows equal

one 90° elbow) beyond two, the maximum capacity listed in the venting table should be reduced by 10 percent (0.90 x maximum listed capacity).

Table 6

Page 16 of 64

Issue 1251

506892-01

Table of Contents