Want tankless h2o stove where on earth do i look?
Ebay
USA Steer clear of Home Depot. They receive the cheapest junk possible, sometimes second and stuff that the plumbing stores will not sell.
Renai and Bosch spawn the heaters. There are others. Go to a plumbing supply house - they will be happy to provide brochures and any other info they hold.
Research on line, below instantaneous water heaters or tankless hose down heaters. We put one in my brother's house - and he bought a hulking capacity space heater that can supply three showers simultaneously - and it reduced his spring/summer gas bill by $76 per month. The heater and parts to hook it up cost give or take a few $1200.
I have a conventional 40 gallon gas fired sea heater that works powerfully. When it stops working, I will put in an instantaneous. Right presently I am paying to keep 40 gallons of marine hot 24 hrs per day, use it or not. What a spend in dribs and drabs.
Answers: Google 'tankless water heaters'. You will acquire a ton of manufactures and suppliers