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 1-sq.-inch for each 4000 Btu score of water heater is required inside the higher and lower twelve inches of the enclosure. With above 20 years https://clinte611wvm5.p2blogs.com/profile