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การผลิตท่ออากาศหุ้มฉนวนล่วงหน้า
This guide provides a step-by-step overview of installing PIR, PU, and Phenolic pre-insulated air ducts—from tracing and cutting to folding, taping, reinforcement, and final sealing. Proper installation ensures airtight performance, better airflow, and long-term HVAC efficiency.
