IAQ ESTIMATE system very dusty from recent remodeling Ductwork and furnace/coil needs to be cleaned to remove allergens and return efficiency to system to prevent premature failure Biological growth present in the supply plenum and likely in the ductwork due to dust build up. Construction materials off gas chemical fumes for years depending on materials used All air quality products come with lifetime warranties on in the electrical components and 3 year warranties on the UV bulbs Coil should be resealed to the plenum. Can be added to any other estimate Emailed options to homeowner and will follow up later date