They are in front of the elevators at an outdoor multi story parking garage around my area. That's all I wanted to share, thanks.
I responded further down but the infrared equivalent to these are very useful and explicitly solve for the energy waste issue you describe. Infrared heaters canβt heat open air which means heat-energy is transferred right to solid surfaces. It is extremely efficient in areas with any amount of airflow as the heat isnβt able to be blown away as itβs radiating from the surfaces below the heater, not the heater or the air between.