Dispatched for noise in office area. At arrival the system was turned on. After a thorough inspection it was found to have air leaking through the return trunk creating a reed instrument noise. Solution is wrap duct work, clean duct work and for better performance adding a humidifier. Thank you for allowing us in your house to provide the perfect home service and for being a member of the perfect family service club from your LBA Lead Service tech Calvin. If I provided a positive or five star experience. I’d appreciate you sharing your thoughts in a review.