ASHRAE Biofilm Control Study
In 2009, ASHRAE commissioned a study through the University of Pittsburgh. The two parties established a protocol to evaluate chemical-free water treatment systems and their effectiveness in controlling sessile bacteria (biofilm) in cool water systems.
The initial test evaluated the industry-leading brand name systems using magnetic, electrostatic, ultrasound, and cavitation. None of these devices showed the ability to control microbial growth rates compared to the control.
In 2012, an evaluation was commissioned to test the Draught Guard technology using the same protocol at the University of Pittsburgh.
A 98% reduction of sessile bacteria (biofilm) was achieved against the control.
The technology used by the Draught Guard system is the only chemical-free system to have passed this test to date.