Non-metal building materials for ventilation in domestic, commercial and industrial use, namely, intake and exhaust filters; Non-metal vent cover for HVAC ducts; non-metal screens for HVAC ducts; non-metal increasers for HVAC ducts; non-metal reducers for HVAC ducts; non-metal couplers for HVAC ducts; non-metal adapters for HVAC ducts; non-metal connectors for HVAC ducts