Winona Heating & Ventilating is fully certified company offering air and water systems testing and balancing services. It offers precision balancing equipment and also provides indoor air quality testing, air ventilation levels assessment services. The company provides regular maintenance services for heating and cooling equipments and environmental control systems. Established in 1902, the company provides expertise in all types of roofing services, such as membranes, built-up systems, modified bitumens and spray-on coatings. Winona Heating & Ventilating offers 24-hour sales and installation services of roofing and testing and balancing. It has fully equipped vehicles for on-site repair and maintenance services. The company provides custom architectural fabrication services, including flashing, scuppers and accessories and ornamentation of metals. It is located in Winona, Minn.