Choosing a duct cleaning company is not an easy task. In fact, a lot of homework needs to be done before you finalize on a particular duct cleaning company. The things you need to keep in mind while choosing a duct cleaning company are the following: Choose a NADCA certified company. It will ensure that the company professionals have undergone required hours of training. The duct cleaning company that you choose should have the right kind of equipment for duct cleaning. You should opt for “flat rate counting” instead of choosing the “vent counting” method. Always opt for the written estimate of the job which should include the cost of labor, materials, and other things. Take recommendation from friends and family when you are choosing a duct cleaning company. Lastly, you must check credentials of the company that you are choosing to clean the ducts of your home.