SootDevil Twin Motor RPV-25T HEPA Chimney Sweep Vacuum - Wheels 
 
2 x 1200w Motors
230v
17kg
25 Litre Tank Capacity
175CFM
H14 HEPA Filter 
82cm x 40cm x 40cm
2 x Independent Motor Switches
Robust 12mm Polypropylene Body
Side Folding Handles
4 x Lockable Stainless Steel Drum Clamps
4 x Caster Wheels (With Lockable Brakes) - All Wheels Can Be Removed 
Grey Industrial Rubber Cable Flex
Uses RPS 4BH Bags or Numatic HEPA 4BH Closed Bags
 
Airflow
When contemplating a vacuum purchase there is too much emphasis on the number of motors and the wattage a vacuum produces. More importantly is airflow, this should be the first consideration as this determines the strength of the vacuum and the air it can pull through the machine which is measured in CFM(Cubic Feet per Minute) with a pre-filter, HEPA filter and a vacuum hose connected. The SootDevil range of vacuums use robust Ametek motors that produce 108 CFM of airflow with one motor and 175CFM with both motors turned on.
 
Filtration
The SootDevil vacuum filtration use 3 stages of filtration, the first is the Hepa-Flo woven collection bag, then the pre-filter Dry Filter and  finally the H14 rated HEPA filter which is rated at 99.995% efficient, which compared to many popular brands that only use a H13 HEPA filter and are 99.95% efficient. This doesn’t sound a big difference, but it does when it’s keeping the fine dust out of the motors.