Founded by Ronaldo Diaz in 2005, Diaz Sheet Metal, LLC fabricates custom ductwork and provides HVAC and plumbing services for Maryland homes, businesses, and industrial projects. The Hyattsville company stands out for pairing CNC-assisted, SMACNA-compliant duct fabrication with mechanical service, including rapid-response support for urgent plumbing and HVAC needs. It is Maryland licensed and insured and identifies its specialty as precision custom ductwork.
SMACNA-compliant fabrication
NFPA 96 compliant grease duct
Compliance program
Maryland Licensed and Insured
EPA 608 Universal
OSHA Certified
Phoenix MetalsPhoenix Metals is a Baltimore-area sheet metal manufacturer that produces custom metal components and HVAC ductwork. Founded in 1996, it grew from its contracting-sector roots and operates a 55,000-square-foot manufacturing facility near the Port of Baltimore, serving commercial projects across the United States and overseas.BALTIMORE, MD
Fresh Air ConceptsFamily-owned and operated since 2003, Fresh Air Concepts provides residential and commercial HVAC, electrical, and mechanical services from its Linthicum, Maryland base across the Baltimore–Washington region. The company combines HVAC expertise with in-house automated sheet-metal fabrication and is a Mitsubishi Diamond Commercial Contractor, supporting customized systems from home installations to complex commercial facilities. Fresh Air Concepts is also a nine-time Carrier President’s Award winner.LINTHICUM HEIGHTS, MD
Wm. H. Brady, IncWm. H. Brady, Inc. is a custom sheet metal fabricator in Elkton, Maryland, specializing in ductwork and custom metal fabrication. Founded in February 1962 by Wm. H. Brady, Jr., this family-run business is now in its third generation and operates a 25,000-square-foot manufacturing facility with two shifts and a separate 5,000-square-foot storage facility.ELKTON, MD
Cool Breeze Heating & Air ConditioningServing Gaithersburg and surrounding communities since 1981, Cool Breeze Heating & Air Conditioning provides residential and commercial heating, cooling, and plumbing services. Founded and led by Ronnie Tolbert, the company has installed thousands of HVAC systems over more than 40 years, while its plumbing division brings more than two decades of experience. Cool Breeze also maintains its own sheet-metal shop, allowing its craftsmen to build custom HVAC applications for faster installation.ROCKVILLE, MD