All Exhaust Hood Systems are Guaranteed to pass all state and local codes. ALL NAKS® Commercial Exhaust Hood Systems are constructed in the USA from Heavy Gauge Steel and built to NSF and NFPA 96 Standards, are ETL Listed and comply with UL710 Hood Standards. HOODMART® offers a full line of the finest Exhaust Hood Systems and Custom Fabrication with the industry’s longest lasting and most energy efficient insulation.