Browse a selection of top-quality oil unit heaters at F.W. Webb. An oil-fired heater is an efficient and reliable solution for heating a factory, boiler room, warehouse, or large commercial area; mount an oil-fired heater on the ceiling to maximize space. This oil heater also uses less electricity than a traditional unit, helping you save costs at your commercial facility. Explore oil unit heaters from trusted maker Modine to find the best fit for your needs.