Most companies will tell you to have it done annually, but it depends upon a variety of factors, including the environment, pet dander, and personal preference, among others.
Yes, we have service vehicles that are supplied with truck mounted equipment so that we can easily clean all your duct work.
Yes, our technicians are fully trained in furnace, duct work cleaning, and all other services that we provide. You should make sure the company you select has trained personnel who are going to be performing these services. Our technicians are also fully bonded and insured.
The cost of the job depends upon many factors.