For commercial applications, TOUGHNESS is the name of the game. Because commercial-use doors see a lot of action, they need to be durable and long-lasting. C.H.I.’s line of tough, heavy-duty commercial doors are built to withstand a higher volume of operation, so you can be sure they’ll be around for a long time. And C.H.I. backs up all of its commercial doors with a 10-year limited warranty, because you want to feel good about your decision.