The Edge Tub Elite is our most powerful option, offering hot + cold functionality and is available in our standard and XL tub size. With a 1 HP chiller, it cools water down to 37 degrees or heats it up to 205 degrees in less than 2.5 hours. The Edge Tub Legacy is our most affordable option, with a lighter chiller, cold functionality only and is available in our standard tub size. The Legacy chiller has 0.8 HP and cools the water down to 37 degrees in 5 hours.