Mr Fix It Plumbing 4320 Atlantic Ave #230, Long Beach, CA 90807 (562) 988-2454 http://www.mrfixitplumbing.com/ A combustion air opening in an exterior wall of one-square-inch for each 4000 Btu score of drinking water heater is needed throughout the higher and lower 12 inches from the enclosure. Are you addressing https://mortone332xmc1.actoblog.com/profile