SandenVendo America now offers a full range of vending machines charged with R290 HC, hydrocarbon refrigeration systems. All models are cUL listed and meet or exceed DOE and Energy Star requirements. R290 is a safe and abundant natural refrigerant with a zero Ozone Depleting Potential and a Global Warming Potential (GWP) less than four , compared to HFC - R134a’s GWP of 1,430, so it’s clear that R290 is the sustainable choice of the future.