These 15-27.5-ton rooftop units exceed Department of Energy (DOE) 2018 guidelines by up to 25% and already surpass future DOE 2023 part-load standards by nearly 10% to reduce energy use. Features a lightweight design that is up to 33% lighter than existing Coleman models. Multiple outdoor air options, including both factory and field installed versions of low-leak damper economizers, constant volume powered exhaust and modulating powered exhaust.