William Acorn, P.E., CFLC, FASHRAE

William Acorn, P.E., CFLC, FASHRAE is a forensic engineering expert specializing in HVAC systems evaluation and construction defects analysis. With a career spanning cleanroom design, building code compliance, and patent dispute resolution, he brings a multifaceted perspective to litigation work. His work centers on investigating HVAC system failures, assessing construction defects, and evaluating whether building code compliance has been met.

Mr. Acorn has been retained in numerous expert witness and consulting engagements across the United States, involving semiconductor facilities, data centers, and healthcare facilities. His Professional Mechanical Engineer licenses in AZ, CA, CO, IL, IA, NV, NH, NM, OR, TX, UT, and WA, along with his Fellow status in ASHRAE, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving complex engineering systems.