Both types are identical except for the front panel. Both provide the same amount of output and heat. Related ArticlesShould I choose an oil heater, floor heater or panel heater?Do Mill heaters have different power consumption and efficiency depending on the model?How do I set the day/night program my Mill Steel / Glass Panel Heater?Voluntary recall of Mill 250-watt glass panel heaters (MB250) and steel panel heaters (IB250) manufactured in 2018.What are the different power levels on the Mill Patio Heater?
