If you are experiencing sudden allergies in your new home, it could be that the previous owners had a furry pet. Pet dander is microscopic and the allergens in it remain strong for an extremely long time, so people can still experience an allergic reaction even after the pet has left the home. Dander clings to furniture, walls and other surfaces. It also gets into the air ducts, where it is blown throughout the home whenever your furnace or air conditioner kicks on. Four Seasons can help you fight pet dander and breath easier with a thorough air duct, carpet and upholstery cleaning.