Mistral MPP274S Installation Manual And User's Manual page 8

Calculating the effective length of the exhaust system
For setting up the exhaust system, we recommend a metal pipe of 6'' (15.25 cm) in diameter with a
maximum length of 35 feet (10.7 m). For optimum performance, DO NOT use more than three 90° elbows.
To calculate the length of the exhaust system required, add the equivalent length (feet/meters) of all the
components used in the circuit.
Pipe component
45° Elbow
90° Elbow
6" (15.25 cm
)
2.5 ft
0.7 m)
(
5.0 ft
1.5 m)
(
Example of an exhaust system - 6" (15.25 cm)
90° Elbow
Maximum length
1 - 90° Elbow
1 - Discharge exit
1 - Pipe (straight)
Total length
8
Mural
discharge
exit
= 35 ft (10.7 m)
= 5 ft (1.5 m)
= 5 ft (1.5 m)
= 9 ft (2.75 m)
= 19 ft (5.8 m)