These powerful and extremely portable duct cleaning systems are ideal for residential and light commercial air duct cleaning. The slim, narrow three piece design allows the system to be maneuvered through the tightest doorways and staircases. These systems feature a unique 3-stage filtration system, including a final stage 99.97% HEPA filter to assure you that only absolute clean air will be returned back into the environment. The backward incline 1.5 H.P. motor and blower assemblies create a powerful vacuum and allows you to clean-up with confidence.