YES! At Marks Duct Cleaning we do guarantee our duct cleaning services every time we take a cleaning assignment in Melbourne. We have a dedicated team of extremely skilled and intelligent cleaners who have been doing duct cleaning for more than 10 years now. They know their job inside out and we are sure that you will be impressed with their performance. We have an invincible record of 100% satisfied customers since the establishment of our company. However, in any case if you do not feel satisfied then we will not ask for any payment.