Same as the base mount blower, it evacuates air in basements and crawl spaces when test results indicate abnormal radon readings. It may be installed on a sump pit, in sheet metal base board or wall and slab pipes. Pipe not included
Specifications for In-Line Blower: 
115VAC, 60 Hz 
Self cooling, overload protected 
65 CFM at 0" static pressure 
8' 3-wire SJ cord with ground plug 
4" inlet and discharge 
In-line speed control to customize ventilation requirements.
Manufacturer: Wells