These units have a small foot print for easy mounting, 1 or 3 plates for maximum flexibility and are thermostat controlled for a wide range of settings. Consrtuction is a powder coated galvanized base which is corrosion resistant and easy to clean. Fan cooled condenser increases efficiency while the DC compressor is quiet, vibration free, safe and dependable. The pure DC unit minimizes RF noise / Electrolysis and is designed to operate at a constant angle of 30 degrees. The unit is shipped with everything you need to complete the installation.