ACCO Engineered Systems
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Large national commercial HVAC and engineering firm with strong Pacific Northwest presence. BBB profile exists for Seattle location. No consumer review aggregator data — primarily serves institutional and commercial clients.
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About ACCO Engineered Systems
ACCO Engineered Systems is one of the largest commercial mechanical and HVAC contractors in the United States, with over 3,000 employees across 32 locations. Their Seattle office, located at 5300 Denver Avenue S, serves the Pacific Northwest with comprehensive HVAC construction, plumbing, and facility services for commercial and industrial buildings. ACCO's Seattle team has completed notable projects including the Adobe Data Center and South Sound Behavioral Health facility. ACCO's energy management division conducts commercial energy audits in accordance with ASHRAE standards, performing Energy Utilization Analysis (EUA) by reviewing 12 months of utility billing data for each meter. Their engineers deploy portable data loggers for HVAC system monitoring, run Building Automation System (BAS) diagnostics, and produce Life Cycle Cost Analysis (LCCA) for investment-grade capital projects. They also assist clients with Energy Star certification and compliance with Seattle's mandatory commercial energy benchmarking ordinance. Services extend to full mechanical system retrofits and commissioning, making ACCO a one-stop shop for large commercial and institutional building owners who need audit, design, and construction under one roof. Their 24-hour service line (800-998-2226) supports facilities with around-the-clock maintenance needs. The company serves exclusively commercial, industrial, and institutional clients — no residential work. ACCO is the right choice for building owners managing large commercial portfolios in the Seattle area who need ASHRAE-compliant audits tied directly into capital improvement planning and mechanical construction capacity. They are particularly strong for data centers, healthcare facilities, and multi-site commercial operators.