Roberts Gorden Low Intensity Unitary Heater Designed for Harsh Environments HE-40 User Manual | Page 5 / 72 | Original mode | Also for: Low Intensity Unitary Heater Designed for Harsh Environments HE-80, Low Intensity Unitary Heater Designed for Harsh Environments HE-175, Low Intensity Unitary Heater Designed for Harsh Environments HE-125, Low Intensity Unitary Heater Designed for Harsh Environments HE-60