I am a home service technician, and I recently completed a furnace maintenance job for a customer. The customer requested an estimate for radon and duct cleaning. I inspected the furnace and determined that it was in good working condition, but I recommended that the customer have the radon and duct cleaning done to improve the air quality in their home. I provided the customer with an estimate for the cleaning and explained the process to them. They agreed to have the cleaning done, and I scheduled the appointment for the next day. I arrived on time and completed the cleaning quickly and efficiently. The customer was pleased with the results and thanked me for my service.