THE AIR-CONDITIONED PIR INSULATED DUCT BOARD SYSTEM: FIRE CLASSIFICATION We are starting today a series of articles about the A/C PIR insulated duct board. PIR insulated duct boards is a brilliant system to build ducts for air conditioning. WHAT IS THE AIR – CONDITIONED PIR INSULATED DUCT BOARD SYSTEM? It’s a system that uses pre-insulated … Continue Reading
