Mendota DXV-42 Installation & Operating Instructions Manual page 13

L.P. Gas or High Altitude (Above 4,000 Ft. but Below 7,500 Ft.)
Minimum Height Required for Horizontal Termination
7" MAXIMUM SECTION CAN BE USED FOR HORIZONTAL RUNS.
WARNING: For L.P. gas and high altitude installations (above 4,000 ft. but below 7,500 ft), 45° elbows must be used in
place of 90° elbows.
NOTE: This requires 32" minimum height to center.
CAUTION: If 90° elbows must be used, a 3-foot vertical starter section must be used off the top of the fireplace.
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