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Hello Wall....long time since I've visited and was hoping for some experienced advice. Here in Sandy storm savaged long island I'm getting repeated requests for wall hung combination gas heat/dhw units. I've used some Baxi Luna units mainly because ther are available. The Dhw output is minimal with restricted pressure. It's a nice compact unit but think it will be a nightmare to service....probably will have to be taken down off the wall to service/replace the expansion tank/plate heat exchanger...etc? I plan to get trained it the installation & repair of these unit but can anyone shed some light on them in the meantime. Maybe recommend a superior branf that will satisfy some of the larger homes we service with multiple baths?