Chauffage Ventilation Aération / Ventilation / France Demandes

looking for electrical / plumbing / HVAC material suppliers

i need air duct I received a lot of feedback but they were all stockist I need equipment according to a technical spécifications and drawing

I'am looking for Hepa air filters manufacturer

i'm looking for absolute filter H13 with box for operating room air flow 1800 cmh speed 2 m/s