Figure 4-4. Supply Air Duct and Return Air Duct Connection

TM-9-4520-258-14 Heater Duct Type Portable Trailer Mounted 400 000 BTU/HR Model PH-400-G Manual
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TM 9-4520-258-14 4-7. INSTALLATION INSTRUCTIONS - continued. Figure 4-4. Supply Air Duct and Return Air Duct Connection 4-9

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