altEnjoy ideal temperatures in your boating environment year-round with Dometic’s EnviroComfort air conditioning systems. We offer a wide range of capacities from 5,000 to 15,000 BTU/hr, so you can size the system to suit your boat for ultimate cooling and heating comfort. All EnviroComfort models use R-417A refrigerant, an environmentally safe gas. The EnviroComfort kit includes everything needed for a professional installation on boats with or without an existing air conditioning system. EnviroComfort units use high-velocity blowers that eliminate blower-motor overhang for a smaller installation footprint.