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NateDiggityDogg
Member
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# Posted: 2 Mar 2017 09:15pm
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Several years ago we purchased a Rinnai tankless water heater for our cabin. We are just getting around to attempting to connect propane to it. We would like to hook a 250 gallon tank to it however the condition of our road would not allow a gas truck to get in for several months (if this year). We've looked into using a 100lb tank but the propane guy says it won't work. "The smaller bottles uses 3/8 hose and the water heater has a 3/4 feed line. You won't be able to keep it fed." What y'all use?
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MtnDon
Member
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# Posted: 2 Mar 2017 09:35pm
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Check the user manual, the specs. Look for the input BTU's rating. There is a good chance the water heater requires more BTU's input than can be taken out of a 100# cylinder.
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MtnDon
Member
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# Posted: 2 Mar 2017 09:40pm
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Temperature of the propane affects delivery. Some info here.
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NateDiggityDogg
Member
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# Posted: 2 Mar 2017 09:42pm
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The heater is 120k BTUs
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MtnDon
Member
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# Posted: 2 Mar 2017 10:42pm
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Look at the 2nd table in my link.... at 20 F a single 100# cylinder does not have the ability to deliver the needed BTU once it falls to less than 70% full.
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bldginsp
Member
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# Posted: 3 Mar 2017 08:52pm
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On demand water heaters regulate the input according to need, so yours would probably not be anywhere near 125,000 btus in normal use. A single shower takes maybe 30-50,000 btus max to keep going.
But why not get the 250 gallon tank, or larger, and fill it in the early fall? Should be enough to last the winter.
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Wendigolake
Member
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# Posted: 3 Mar 2017 10:19pm
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You might want to install a few 100lb tanks and hook them together with a proper manifold system if you don't want to go the 250 lb route.
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darz5150
Member
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# Posted: 3 Mar 2017 11:04pm
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Have you considered getting a different water heater that can be hooked up to propane tanks from 20# on up? Ecotemp ,Marey, Coleman are a few brands. Some of them are powered by a battery and a BBQ size propane tank.
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NateDiggityDogg
Member
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# Posted: 4 Mar 2017 09:10am
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We would go to a bigger propane tank but we can't get the propane trucks down our road.
Please tell me about hot water heaters that we can run off of smaller bottles.
We have a 6500 watt Honda generator and a tanked water heater at the moment but we don't run the generator all of the time and it's a load on it 1500 watts.
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darz5150
Member
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# Posted: 4 Mar 2017 09:50am
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http://www.small-cabin.com/forum/1_7385_0.html
Look on amazon for lp water heaters.
You can search this site also. Lots of posts about them.
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NateDiggityDogg
Member
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# Posted: 4 Mar 2017 10:06am
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Anything you'd suggest?
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darz5150
Member
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# Posted: 4 Mar 2017 10:36am
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Ecotemps seem to be good. L5 and L10. They have a combo on amazon with the water heater and pump.
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NateDiggityDogg
Member
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# Posted: 7 Mar 2017 09:58pm
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The user reviews don't look great for the Eccotemp. Other suggestions?
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bldginsp
Member
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# Posted: 7 Mar 2017 10:02pm
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I had an eccotemp L10, but it didn't work because my system has low pressure. The L10 requires at least 20 lbs pressure. So I sold it and got a Marey, their smallest model, the portable. Works fine
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Steve_S
Member
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# Posted: 7 Mar 2017 10:14pm
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You may want to have a look at Takagi as they are quite a nice product but that's reflected in the cost. I have a TH3-M Propane for my radiant flooring.
http://www.takagi.com/products/tankless-water-heaters
https://www.amazon.com/s?h=n%3A3754791%2Cp_4%3ATakagi
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