Technological advancements have improved the energy efficiency of these units.
Some merchandisers use a heating system without fans, calrods or heat lamps for added energy efficiency.
Low-wattage elements and elements that cover the entire holding surface eliminate cold and hot spots, distributing heat more efficiently.
A product sensor feature on some models turns the unit on only when product is inside, saving energy during slow periods.
Changes in lighting and heating technology have resulted in reduced power consumption.
Newer technology will automatically reduce the merchandiser's power consumption when certain areas of the case are not in use.