Northwest Ohio's premier Air duct cleaning company with over 45 years in business using only the best truck mount duct cleaning units. My name is Greg Brown and our family has been in the indoor air quality business for over 70 years. My great grandfather and grandfather opened The W.R. Pringle Company in 1969. After splitting from the original Pringle company out in Walla Wall Washington they decided to start their new business right here in northwest Ohio. My dad Don Brown who has been there since the beginning is still here after 45 years.