In Auto Mode, when higher levels of contaminants and odours are detected, fan speeds and noise levels (dBA@3m) will increase until the levels of contamination/odour have been removed/filtered and maintaned. The Air Quality Colour indicators will also change as readings increase and decrease.

When low levels of contamination and odour are being detected, fan speeds are reduced, therefore noise levels are also lowered and could be described as whisper quiet.

OLS-K07 (29.5 - 76dBA)
OLS - K09 (26 - 68dBA)
OLS - K15 (22 - 66dBA)