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Professional Service
Welded Grease Duct
Certified Kitchen Exhaust Systems
Premium welded blackout iron and stainless steel grease duct for commercial kitchen ventilation. We guarantee all our welded seams will pass the light test for code compliance and safety.
Our Services
Light Test Guarantee
We guarantee all welded seams pass the rigorous light test inspection.
Heavy Duty Materials
Available in 16ga, 14ga, or thicker Black Iron and Stainless Steel.
Kitchen Ready
Designed specifically for commercial kitchen exhaust and grease containment.
Access Solutions
Integrated cleanouts, drains, and access doors for easy maintenance.
Why Choose Diaz Sheet Metal?
Guaranteed code compliance for commercial kitchens
Superior leak-proof welded construction
Available in Black Iron and 304/316 Stainless Steel
Custom fabrication for tight spaces
Direct coordination with fire protection wrap
Fast turnaround for restaurant openings
Our Process
1
Field Measure
We verify measurements to ensure strict code compliance.
2
Precision Welding
MIG/TIG welding by certified fabricators in our shop.
3
Light Testing
Rigorous quality control testing of every seam.
4
Delivery
Careful transport to your job site, ready for installation.
Frequently Asked Questions
What is your Light Test Guarantee?▼
We are so confident in our welding quality that we guarantee every section of grease duct we fabricate will pass the standard light test inspection required by local building codes.
What materials do you use for grease duct?▼
We standardly fabricate with 16-gauge or 14-gauge Black Iron, but can also fabricate with 18-gauge to 10-gauge Stainless Steel (304 or 316) depending on your project specifications.
Do you provide cleanouts and access doors?▼
Yes, we can pre-install leak-proof grease duct access doors and drains to meet NFPA 96 cleaning and inspection requirements.
Can you provide fire wrap?▼
Absolutely. We are an authorized supplier of 3M™ Fire Barrier Duct Wrap 615+ and can provide it alongside your duct order.
Ready to Get Started?
Contact us today for a free estimate on your welded grease duct project.