A quick calculation: space heating in food service normally uses 46 trillion BTU of energy [1]. That's 0.05% of all energy consumed in the US, which has dipped

A quick calculation: space heating in food service normally uses 46 trillion BTU of energy [1]. That's 0.05% of all energy consumed in the US, which has dipped by about 10-15% [2]. So if these space heaters would increase heating energy use 5-fold annually across the entire food service industry (I think that's a high estimate), that would undo 2% of the dip. [1] https://www.eia.gov/consumption/commercial/data/2012/c&e/pdf/e1-e11.pdf https://www.eia.gov/consumption/commercial/data/2012/c&e/pdf..., table E1. [2] https://www.eia.gov/totalenergy/data/monthly/pdf/sec2_3.pdf https://www.eia.gov/totalenergy/data/monthly/pdf/sec2_3.pdf