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Replies: 15
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All-In [36410]
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Need The Collective Wisdom of TNET
Mar 7, 2024, 9:34 AM
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Looking to replace 2 80gal gas hot water heaters that are in same closet with tankless. With kids gone but that visit sometimes I want to go to one tankless unit
Pro tips and insights needed. Thanks
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All-In [25823]
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Re: Need The Collective Wisdom of TNET
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Mar 7, 2024, 9:41 AM
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I went to tankless and it was the best thing I ever did as far as water heaters. I went with Rinnai.
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CU Medallion [57202]
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Re: Need The Collective Wisdom of TNET
Mar 7, 2024, 12:09 PM
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Me too. Three daughters. Thing handles extremely three long showers simultaneously like a champ.
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Orange Blooded [2596]
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Re: Need The Collective Wisdom of TNET
Mar 7, 2024, 2:28 PM
[ in reply to Re: Need The Collective Wisdom of TNET ] |
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I installed a Rinnai a few years ago. All the hot water you want. The only problem you may encounter is that it requires a certain minimum amount of water flow before the heater kicks on. Initially, I could not get hot water at the sink farthest from the heater unless I turned on another source because the flow was not good enough. Once I increased the flow to that faucet, I’ve had no problems. I would never go back to a tank.
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CU Medallion [64593]
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I have a tankless unit and it's awesome...
Mar 7, 2024, 9:42 AM
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If your existing hot water heaters are gas, since they use fuel combustion, you should not install them in a closet.
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110%er [7535]
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Re: Need The Collective Wisdom of TNET
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Mar 7, 2024, 9:54 AM
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2-80's would be hard to replace with one tankless but two 80's in one house especially in same room is unusual. Is your house that large where you would have 5-8 hotwater applications at one time? Often large homes with multiple heaters are strategically placed so that you get hotwater quickly to areas and dont waste lots of cold water trying to get water to far end of house.
Do you have natural gas? Little savings with electric tankless. If you still have over 5 simultaneous application, 1 tankless probably wont be enough. I have seen on large homes that put in a tankless also have a smaller 40gal HWH on far end of house often for showers or clothes that gets filled by tankless so it runs minimal but gives immediate hot water, whole house is run 90% by tankless but have extra heating for high demand.
But as stated, your starting point of two 80s is not a normal setup typically.
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All-In [44055]
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I have tankless and highly recommend it.***
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Mar 7, 2024, 10:03 AM
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All-In [44055]
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I see that colberttiger doesn't like tankless water heaters.***
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Mar 7, 2024, 1:30 PM
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Legend [16925]
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Orange Blooded [4059]
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Have had 2 tankless and love them
Mar 7, 2024, 11:02 AM
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Learn how to flush the tank yourself. It is easy to do with a smidgen of plumbing skill. Needs to be done annually, generally. The techs they send do not necessarily know what they are doing. Last flushing, they sent a very nice kid who (twice) did not do it properly. If not flushed properly, it will cease consistent operation.
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Orange Blooded [3456]
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Boy are you out of luck TNET has no wisdom
Mar 7, 2024, 11:05 AM
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Had tank less in late 70s over in Bangkok and loved it. Don't know why it has taken so long to get more popular in the US. It was still "new" 18 years ago when we were building our house, and at 9100 feet the builder didn't recommend it. I listened to him and regretted it as the water was so hard it just ate up the anodes in the water heater. Water softener pretty that solved that. Don't know how hard water will affect tank less though.
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CU Medallion [55433]
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Re: Need The Collective Wisdom of TNET
Mar 7, 2024, 11:37 AM
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From what I've heard about them, they would be the logical choice if you have a big family. But if just you and the wife and an occasional visit, I don't think they would be worth the cost. I just replaced a 40 gallon heater in my house with A O Smith heater from Lowes, and we haven't run out of hot water since I installed it. The change out is pretty easy to do yourself...
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Orange Blooded [4724]
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Re: Need The Collective Wisdom of TNET
Mar 7, 2024, 12:02 PM
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We did Tankless in our new build and so far it has been wonderful.
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CU Medallion [51098]
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Re: Need The Collective Wisdom of TNET
Mar 7, 2024, 12:21 PM
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Only drawback with gas tankless is that it still needs electricity to operate (or at least mine does) and as soon as the power goes off, you can't get a quick shower like you can with a tank that stays hot for a while.
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CU Medallion [64593]
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Unless you also have a whole house generator.***
Mar 7, 2024, 1:21 PM
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Legend [16733]
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Re: Need The Collective Wisdom of TNET
Mar 7, 2024, 1:50 PM
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Dude how many water heaters do you got?
How many bathrooms do you have?
I'm scratching my head looking at your demand, two 80 gal and at least one tankless. Your conventional water heaters are gas. Are they leaking/not working?
IF you have that many bathrooms, a gas fireplace, gas heat, gas dryer, gas range you may have a huge BTU requirement that your gas line can not provide. You need to do some serious math to add up all BTU load.
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Replies: 15
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