Tankless Water Heater and BTUs

Hello, I would like to replace my heated watertank with a tankless heater. The system is gas. I am trying to figure out how much/min BTUs the new system should have. ANyone knows? Thank you I would like to replace my heated watertank with a tankless heater. Why??? What is the reasoning? Whatever the BTU rating of the unit is the amount of btu's you need to supply it.... Didn't think of that. lol thank you very much. I'm not sure that was an answer though... WHY are you wanting to do this? If your existing tank is still in good shape and working well, keep it until it craps out, THEN think about something different if you wish. So to your question: Did you mean to ask: How big a unit (BTUs) would I need? To answer that, a lot more info is needed. How many baths? How many people? Hot tub? Laundry? etc... one would need to know the demand on the system before sizing it. The reason is: The conventional water heater right now is in a little storage room in the garage. This storage room adds exactly to the wall on the shower. I would lke to take the heater out, close the storage room and use the space to build a larger walk in shower. That's why I would like to replace that with a tankless heater, because it can be just placed on the wall in the garage. The house has two full baths and right now occupied with one person, me. Generally speaking, tankless heaters are a lot better on paper than in real life. With only you living there, the odds go up that you can make one work but keep posting back here with the details so the pros can walk you through the process - there have been many people who looked at tankless only to realize it was not the best choice for them and we want you to find that out before you buy one and pay to have it hooked up rather than afterward if that's going to be the case. So you are saying that the one I have would be a better choice than the tankless? If so, would it be difficult to move the heater I have out of the room into a corner in the garage? Hmmmm.... Thats a nice spot for the heater.... State select made by AO smith. That will probably last you a lot more years.... Anyway if you really want to go tankless here is the thing.... 1. You need more gas... You most likely need to run a dedicated line from the meter to the unit. This drives the cosy way up. 2. Tankless are pricey plus more controls and such to go wrong. Factor repairs in. 3. the vent will need to be rerouted and with speacial pipe if you do notpick a unit that vents with PVC. Do you have an idea where the vent will go. 4. You need to run electric to the unit. A dedicated circuit from the panel. With all of the above you will get a sanwich effect with a tankless... Meaning a cold slug of water while your bathing. To eliminate that a small 19 gallon buffer tank is installed. Additionally a small circ is installed to keep the buffer tank hot. Hmmm... state select 40 gal are $358 here in NJ.... Tankless $1800.....Gas line run $1200.... electric $600...venting...$300. ....$3900!!!!! If so, would it be difficult to move the heater I have out of the room into a corner in the garage? You have to move gas and vent...... Why? to make a shower bigger? Not worth it IMO. I am sure there are other options you can do in the bathroom..... But its your house... We are just letting you know whats involved. Why? to make a shower bigger? Yes. The shower right now is very tiny. I thought of extending it to the water heater site.

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