A small selection of our projects. 43 are under way as of November 2026.
A small selection of the projects we have completed. Many are on secure military sites, so we have no photos of them to share.
HVAC and odor controlHVAC and odor control for King County's new Brightwater Treatment Plant, built between 2006 and 2011 and one of the largest wastewater treatment plants built in Washington State in recent decades. We performed all of the HVAC and odor control work, including the fans, on the solids portion of the site, built by Kiewit. It was a $12 million project for Miller Sheetmetal.
HVAC and odor controlOdor control and HVAC systems for the influent pump station down the hill from the Brightwater Wastewater Treatment Plant. Miller Sheetmetal provided and installed the HVAC and odor control systems, including carbon scrubbers and biological scrubbers that treat hydrogen sulfide from the pump station, along with large generator shrouds and ductwork.
Dry-side HVAC and kitchen exhaustHome of the Seattle Mariners. Miller Sheetmetal provided and installed the dry-side HVAC for the ballpark, including air handlers and ductwork, along with the hoods and exhaust systems for the kitchens and concession stands.
HVAC replacementReplacement of the HVAC system throughout the South Satellite terminal at Seattle-Tacoma International Airport. Working as the dry-side subcontractor, Miller Sheetmetal replaced all of the ductwork, set the equipment and installed the refrigeration piping, including refrigeration piping for the food service tenants.
Miller Sheetmetal provided extensive HVAC ductwork and equipment for the replacement of the airport's baggage handling and claim system, along with revised ventilation and HVAC throughout Seattle-Tacoma International Airport. This was a long-duration project.
The Navy's new second explosives handling wharf at Bangor, a $344 million project completed in 2016. Miller Sheetmetal was the dry-side mechanical contractor, providing the HVAC and refrigeration piping. We were also responsible for the controls, including integrating the DDC system and the SCADA system.
Precision coolingElectrical and server rooms dedicated to providing hardened, secure power and communications for the flight line at Joint Base Lewis-McChord. Miller Sheetmetal provided the precision cooling system, which was shake-table tested to keep working through a seismic event.
Prime mechanical contractor, Divisions 22 and 23A new 68,000 square foot elementary school for about 600 students, built with Absher Construction to replace the old Grant Street Elementary, which was demolished. Miller Sheetmetal was the prime mechanical contractor for Divisions 22 and 23, providing the ductwork and HVAC equipment ourselves and managing the plumbing and other mechanical subcontractors under our contract.
Custom copper claddingCustom copper cladding for the fountains at Bremerton's Harborside Fountain Park. Each fountain is an ellipse, and the cladding was shop fabricated to that shape to suit the park's naval theme, with the fountains designed to suggest submarines rising from the water.
Air handling unit replacement, prime mechanical contractorA $7 million project replacing nine custom air handling units in mechanical rooms throughout the Naval Hospital. The units were 30 to 40 feet long, 12 to 15 feet high and 12 to 15 feet wide, and each one had to be brought in as knocked-down sections through a very small freight elevator and assembled in place. A large temporary HVAC system kept the hospital ventilated during the changeout. The work also included duct modifications, controls and wet-side piping. Miller Sheetmetal was the prime mechanical contractor, with subcontractors under us.
A large air handling unit replacement. The existing air handlers sat on catwalks 30 to 40 feet above the building floor. We removed the rooftop penthouses to reach them, took the old units out in sections and lifted them through the roof by crane, then lowered the new units in sections and assembled them in place. Miller Sheetmetal was the prime mechanical contractor, with the wet-side mechanical subcontractors working under us.
A process facility at Naval Air Station Whidbey Island used in processing jet engines. The project included seven heated varnish dip tanks built of 316L stainless steel, ranging from 500 gallons to over 15,000 gallons, along with ventilation hoods, an all-welded stainless steel industrial exhaust system and a makeup air system. All of the ductwork and the tanks were fabricated in house.
An industrial stainless steel ventilation and makeup air system at Dry Dock 6, providing process air filtration for contamination control. The ductwork was an all-welded stainless steel system, built and pressure decay tested to the nuclear test requirements for welded stainless steel ductwork.
HVAC and odor controlAn odor control and HVAC project in Seattle. The work included FRP odor control ductwork and stainless steel, aluminum and galvanized HVAC ductwork, with a full range of HVAC equipment providing heating, ventilation and air conditioning. Industrial ventilation systems remove corrosive and chemical contaminants from the airstreams and treat the air.
A longer list from our contract job records, grouped by type of work.
A note on photos: much of our work is on secure military installations where photography is not allowed, so we cannot show pictures of those projects. Most of the photos here are public works and fabrication.
