Air Supply Furnace & Duct Cleaning James 10/10 Commercial air duct cleaning. About 1 year ago, Cleaned air ducts with 10 or so RTUS. Work was done over night on weekends over 3 weeks or so. Very satisfied. 23,000+ sq foot building. Job Price Was this review helpful? Company ResponseThank you for your review. I'm glad you were satisfied with the work.