Clearing the air

Repair of water-damaged buildings cause often massive emissions of harmful airborne microbes. To prevent the exposures of the occupants safe repair and drying methods were evaluated. The work area was sealed and maintained under negative pressure by a recently developed air handling unit that can clean and dry air. The development work has been done in co-operation of VTT and Hesasbest Ltd, which is the largest company in Finland specialised in asbestos removal and repair of water-damaged buildings. Experiments made during repair work have shown that with the new method very high control efficiencies can be achieved.