We moved into our 1980's-built home in late April, and did not run our heater at all before summer. Now that the weather is cooler we have been heating the house and have noticed our noses to be more stuffy, and eyes more itchy. There was also a "dusty/dirty" smell when the furnace would kick on. We decided to call DuctWorks and have them come out to clean the ducts/furnace as we did not know if/when the previous owners cleaned the ducts. We couldn't be more happy with the service and quality of work. The before and after pictures that were provided were reassuring of our decision, and explained a lot! Although it may not fix all of our allergy issues, we feel more comfortable knowing they are clean, and would recommend this service to anyone! The technician was courteous and knowledgeable, and cleaned up after himself. Worth every penny!