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Vent Pipe Sizing Worksheet
Step 1
Proposed vent pipe size : ______
Step 2
Termination kit catalog number : _____________
Vent pipe equivalency value from table 5 : ______
Step 3
Total number of 90° elbows required (indoors and outdoors)
______ X 5 = ______ equivalent feet of pipe
Step 4
Total number of 45° elbows required (indoors and outdoors)
______ X 2.5 = ______ equivalent feet of pipe
Step 5
Linear feet of straight pipe required : ______
Add equivalent feet of vent pipe listed in
Step 6
steps 2 through 5.
If the total is equal to, or less than, the allowable maximum given in table 6, the proposed pipe size is acceptable. If the
total exceeds the maximum allowed vent pipe length, repeat the process above using the next larger diameter pipe until
an acceptable total is achieved.
NOTE − In Direct Vent systems, total the equivalent length of either the exhaust OR intake piping run, depending upon which
will be LONGER. Intake and exhaust pipe diameter must be the same size and must be terminated in the same pressure
zone. Intake and exhaust pipe should be roughly the same length.
G61MP Start−Up & Performance Check List
Job Name
Job Location
Installer
Unit Model No.
Serial No.
Heating Section
Electrical Connections Tight?
Line Voltage
Blower Motor Amps
Fuel Type: Natural Gas?
Furnace Btu Input (High fire)
Low Fire Manifold Pressure
High Fire Manifold Pressure
Flue Connections Tight?
Combustion Gas Tested (high fire and low fire)?
Blower ON delay confirmed?
(45 Seconds Fixed On)
Blower OFF Delay Setting (60, 90, 120 or 180)?
Filter Clean & Secure?
Thermostat
Heat Anticipator Setting?
Job No.
City
City
Technician
Blower Motor H.P.
Gas Piping Connections
Tight & Leak−Tested?
LP/Propane Gas?
Line Pressure
w.c. − Nat.:
w.c. − LP/Propane
w.c. − Nat.:
w.c. − LP/Propane
Proper Draft?
CO
External Static Pressure?
(0.5 maximum)
Page 63
Date
State
State
CO
2
Temperature Rise
Thermostat Level?
Equivalent Feet
TOTAL
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