Stanley Furnace and Duct Cleaning uses most powerful truck mount equipment with custom build, which are rated at 20,000 c.f.m. (cubic feet per minute) of vacuum draw, which is combined with 250 to 300 psi high pressure air force method cleaning system of all your vents, duct and furnace. Also highly qualified technician can do the job professionally. Serving Calgary and surrounding areas, please call us today for a free estimate! more... See more text