Tankless sounds like a great idea especially in limited working space(s). However, I have read more bad,and not so good reviews on most brands of tankless and from users of tankless systems than good. It seems overall that they are tempremental ,and need the perfect "install environment" to work maintenance and hassle free. Most complained about the adjustments being less than expected to keep of with the demands of hot water needed, the down time needed to order some special part,and a host of other technical "might be's." The local Lowes and Home depot here have stopped carrying tankless,infact HD has sent the units they had back to the manufacturer. Being fare, others have experienced not the slightest of problems. I have seen whole house tankless gas or electric units priced at $190. TO $1500. No doubt, as with anything else you get what you pay for... The problems i have encoutered with conventional units were a heating element goes out after maybe more than reasonable years of service,or replaceing a whole unit for a bigger capacity. Both of those take less than 2 hours to remedy if that. All said, i am still open to the idea of tankless... i can just see it turning into undue problems to save 12" to 15" in my case. All others(i would be interested to know what plumbers have to say that have installed tankless too)with experience good or bad with tankless would be greatly appreciated!!Thanks!