Clean Test’s principle is to measure weight of dust deposit inside ventilation ducts. The dust is vacuumed and collected in a filter, which is weighted before and after testing. The dust weight is calculated to grams per square meter [g/m²].
 

The vacuum method is preferred over other methods as it gives an objective test result. See page 53 in Dr. Holopainen's thesis "DUST IN VENTILATION DUCTS: ACCUMULATION, MEASUREMENT AND REMOVAL".
 

Calibration equipment is included. 6-50 l/min ±5 %
 

Standard filter cassette for dust sampling
 

Magnetic folio template for exact test area. Ensures high accuracy
 

Remote controlled power switch. Simplifies sampling
 

Powerful and compact vacuum pump
 

 All packed in a rugged box with handle and padlocks
 

Standard setup for APIRAC - Portugal, test
 

Can easily be converted to the NADCA Vacuum Test method