ACCO Engineered Systems

ACCO Engineered Systems is a full-spectrum mechanical contractor serving the Treasure Valley from its Garden City headquarters. With a 4.6-star rating drawn from 21 verified client reviews, the firm handles everything from residential AC repairs to industrial chiller installations for Fortune 500 facilities. The company maintains 24-hour emergency availability and holds active licenses across multiple mechanical trades, including HVAC piping, process piping, plumbing, sheet metal fabrication, and fire sprinkler systems. ACCO operates as an employee-owned organization, meaning every technician on your job site has a direct stake in the quality of their work.

What distinguishes ACCO from regional competitors is their commercial-scale infrastructure and in-house fabrication capability. Unlike most Idaho contractors who subcontract sheet metal work, ACCO fabricates custom ductwork and piping in their own shop, enabling faster project delivery and tighter cost control. Their portfolio includes landmark builds such as SoFi Stadium in Los Angeles and the CCSF STEAM Center in San Francisco, demonstrating the engineering depth available for complex retrofits. Homeowners benefit from the same project-management rigor the company applies to stadium-scale jobs, including Building Information Modeling coordination and commissioning services that verify system performance before sign-off.

Local reviewers highlight several ACCO technicians by name. Brett arrived at a Garden City apartment within hours when the cooling system failed during a summer heat wave, keeping the homeowner informed throughout the repair process. For a Tenth and Main HOA, the ACCO team completed a difficult re-plumbing project that two previous contractors had declined, earning praise from reviewer Clayn Sonderegger for professionalism throughout the scope. A restaurant owner in the area credited ACCO with not only fixing an urgent leak but also proactively inspecting unrelated equipment during the same service call.