I have read all the posts in this discussion and I am quite amazed. I had a Rinnai tank less providing heat and hot water in my home for 8 years with grea success. Bought a new home with a tank. 5 year rental before I can get rid of it. The day the rental agreement ends (62 DAYS FROM NOW) I will be replacing it with a tank less. Savings whatever they are are great, enviroment benefits excellent I guess, but when I want to fill my beachcomber hot tub, or have a shower after my two girls are done showering, the tank sucks. I want tank less because I want endless supply of hot water and a quiet little box that sits on the wall, takes no space, uses outside air for combustion and is never an issue. Yes I also distribute tank less, Navien as well as Noritz. We have well over 1500 in the market. We have had issues but unfortunately 75 per cent of them are caused by sales reps under sizing and over promising. I have also been called by end users who can not fill their bathroom tubs or fancy showers with their 50 gallon tank and have no room for another. Two tank less and they thank the contractor and myself every time very. Their are many reasons to purchase a tank less as well as not to.The most interesting part of this thread in my opinion is the one that picks on foreign products whoever may make them. Korean cars are winning car of the year awards, Japanese cars seem to have taken over the market maybe it is time for us North Americans to get our head out of the sand and start embracing and producing better products rather than calling them crap as they take over the market. European and Asian countries have paid much higher utility costs for years thus they produce more efficient products as a way to keep their costs down in the long run. When you talk payback don't forget oil, natural gas, propane and electricity are artificially low in price right now and will be going up in the very near future. PS no yelling or screaming is required as these are just "my thoughts"