I was in a very similar situation with an older condo that had changed owners several times. Nobody could tell me when the ductwork had last been serviced, so I started reading about what was normally recommended for older buildings. During my search duct cleaning company GTA I found info about Best duct cleaning company GTA — verified and insured technicians. The information helped me understand when duct cleaning makes sense and what the inspection usually includes. That gave me enough confidence to arrange a visit instead of guessing. The technician explained everything clearly, showed me the condition of the ducts, and completed the cleaning in one appointment. A few days later, I noticed less dust collecting around the vents, and the air in the condo seemed much fresher. For an older unit with an unknown history, I felt the service was definitely worthwhile.