<p>Maybe a person displaces 20 gallons of water…</p>
<p>So I am down to 77 gallons…</p>
<p>Keep it simple… :)</p>
<p>What size water heater do I need?</p>
<p>How hot do you need that water?</p>
<p>you should google search “water heater capacity”.</p>
<p>one of them
[Home</a> Tips : Storage Water Heater Buying Guide](<a href=“http://www.hometips.com/buying-guides/water-heaters-conventional-storage.html]Home”>http://www.hometips.com/buying-guides/water-heaters-conventional-storage.html)</p>
<p>Would those instant hot water set ups work?</p>
<p>You should post a photo, that sounds like a cool tub, but an average hot water heater is 40 gallons, it would take 2-3 tankfuls to fill that tub!</p>
<p>If you’re talking about the water heater for the entire house, the capacity of the tub is only one concern. What if you also want to run the dishwasher and the washing machine at the same time? What if you’re taking a shower while someone else is in the tub?</p>
<p>If this is a water heater just for a hot tub, then I’ll quietly slip away, since then I don’t know what I’m talking about.</p>
<p>I would get a flash heater, maybe two to be sure. They heat the water directly after it passes over a coil, and they sit within the thickness of your wall. No tanks needed so no hot water to run out of.</p>
<p>[Tankless</a> Water Heater Buying Guide](<a href=“http://www.tanklesswaterheaterguide.com/]Tankless”>http://www.tanklesswaterheaterguide.com/)</p>
<p>The tub is a little longer, wider and deeper than most tubs…</p>
<p>I have a 50 gallon water heater now…but it has mineral deposits in it. It makes a gurgling noise after a few minutes of running…and we run out of hot water before we fill up the tub…</p>
<p>We haven’t lived in the place long…but I can’t believe the 50 gallon water heater never did the job…but…maybe it didn’t.</p>
<p>Looks like the water heater can heat up to 84 gallons an hour…
I am reading the energy guide on the heater…</p>
<p>I am going to re-calculate. :)</p>
<p>dstark - we have a Jacuzzi tub that holds 2 people. (which I think we did only one time) I cannot remember the # of gallons, but 10 years ago when we built our house we got a 75 gal hot water heater so there would never be an issue with not enough water to fill the tub. It fills it nicely…but then…the water gets cold and there is not enough hot water to keep it toasty. We should have put a heater on the tub. (said tub is now a dust collection site) 75 gals is enough for 3 people to shower in the morning. The 4th can shower with hot water providing the other 3 were not water hogs. </p>
<p>Don’t you have sticker shock from the price of any hot water heater over 50 gallons?</p>
<p>We haven’t really priced it yet. </p>
<p>Kajon…your tub is larger than mine. Mine only fits one person. A bather reclines in the tub. Like a chair. It is not a straight back.</p>
<p>If you can do 75, maybe we can do 50. That’s interesting. There are just 3 of us here and we don’t need hot water at the same time.</p>
<p>I am concerned that we can heat up the water, .but then we can’t refill when the water cools down. </p>
<p>The same issue that you have. </p>
<p>Then again…we may not even be able to heat it up the first time.</p>
<p>This conversation may be moot. I don’t know if we have room for a larger water heater. The heater is in a closet in our living room.</p>
<p>“dstark - we have a Jacuzzi tub that holds 2 people. (which I think we did only one time).”</p>
<p>:)</p>
<p>We replaced a 100 gallon (never ran out of hot water even filling jetted tubs, running laundry and doing dishes at the same time when all the kids were home) with a 50. The kids were all home last year and we were all showering, doing dishes and laundry at the same time and it lasted until the bitter end…my shower. My husband downsized the water heater without consulting me…needless to say I was spitting mad as I stormed out of the shower but with just 3 of us in the house and never have we had two jetted tubs going simultaneously we have not yet run out of hot water so 50 is OK but I’m not not pleased as it doesn’t “save” us a plugged nickle other than the cost of the water heater.</p>
<p>Hmmm…when I read kajon and momofthree… 's posts…maybe a 50 gallon water heater is going to fly…a 50 gallon water heater that is new and doesn’t have mineral issues.</p>
<p>I don’t get the lack of consulting…</p>
<p>How about keeping the water temperature high when you expect to fill the tub? That’s what I do. We have a small whirlpool, 89 gallons that we don’t use much. An hour or two before anyone wants to fill the tub, I turn the temperature setting up. A little nuisance but for something that is rarely used, a good compromise.</p>
<p>Igloo…I am going to try that…</p>
<p>We have two 40 gallon water heaters for our large whirlpool tub. We never run out of hot water (even after 6-10 showers in the morning when we have company). It’s a GREAT set up.</p>
<p>Tankless is THE way to go. You’ll save $ in the long run, because you only heat the water you use. You never run out of hot water.</p>
<p>Kajon: “Said tub is now a dust collection site.”</p>
<p>This has been our experience with giant tubs of all kinds after the first bit of newness wears off. Lived in several homes with two person jacuzzi/soaking tubs in oversized master bathrooms. One giant jacuzzi was a lot of fun because our two oldest were young enough to use it as an indoor bubble filled swimming pool. </p>
<p>Since then all giant tubs are just big clothing hampers… Even the normal sized tub in our present master bath serves that purpose. I can’t remember the last time I took a bath.</p>
<p>My in laws put a giant hot tub in a new construction addition to their home 15 years ago. With its cover on it is a wonderful staging area for the luggage when we visit. They never get the chemicals balanced, so anyone who sits in it for more than a few minutes feels as though their lungs are on fire. </p>
<p>I’ve had one neighbor who actually loved and used her giant tub (with a glass of wine and music playing) every evening. No kids…very healthy marriage. ;)</p>
<p>I am not 100% sure what I have but I never run out of hot water(I would go look but my utility room is downstairs in an outside room and it is a cold day). I have a soaking tub that I use nightly. I can fill it even after H has just showered. I think the key is not the number of gallons but the recovery rate.</p>
<p>Our house has no tubs–we have shower enclosures with tiling that the kids USED as a tub when they were little. D sometimes still does, but really not often since they have gotten older. My brother has a hot tub & other brother had a Japanese furo tub. Neither use it much (2nd brother never used it before he had it taken out). My sister just built a house that has a large tub – believe it is used most by her little nieces. Believe they may have several water heaters to go with their multiple bathrooms, but haven’t asked her.</p>
<p>We have a 100 gallon hot water heater. My Japanese soaking tub (no whirlpool) holds 50 gallons, so I’m fine. But I have noticed that our extremely well-insulated hot water heater, while I’m sure it was costly to the previous owner, keeps a lot of hot water very hot for a long time, even if turned off. I think of it as just one more piece of useful equipment in a power failure.</p>
<p>A quick google leads to the discovery that generally the cost of operating a hot water heater (a new, well-insulated one) is somewhat independent of the size–mostly it’s about how much hot water you USE.</p>