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Old 02-07-2009, 11:53 PM   #15
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Originally Posted by FLYNCLD View Post
Actually now that I look more carefully, the heater says it works well where the incoming water is above 60 degrees. So I guess it's performance will depend on the temp of the water in you tank or you hose if you are on a hookup.
Yeah, I'm sure it works with colder water as well, but here's the issue. When I've got 33 degree water running into the water heater, it will heat warm enough to run a shower at a comfortable temperature. However, the heater is designed to check it's outgoing temperature, and if it isn't warm enough, it thinks there's a problem with the propane source and just flips out and shuts off.

Thus, it's not much fun if you're taking a shower, and somebody turns on the kitchen sink. Rather than a temperature fluctuation, the increased volume flow causes the heater to shut down and you soon have a VERY cold shower. The thing is just too smart for it's own good. I expect that when I get my pump house insulated, this issue will go away for me, so inside your warm rv may not be a problem.

Remember that I'm talking about a different water heater than you're looking at there. I'm just guessing that this one of the reasons why they're giving you the 60 degree temp as a baseline.

I'm not trying to talk you out of the tankless heater. I think it's the most efficient way to go. It's simply not as convenient however and will cause you problems if you've got a spouse who has no tolerance for delays in modern conveniences.
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Old 02-08-2009, 08:53 AM   #16
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When I was shopping for a replacement water heater, I considered the tankless but went with the regular "tank" kind because of concerns about wasting water while waiting for it to get hot and the temperature of the exhaust heat going out of the trailer through vents etc...

There is a post about adding a valve at the end of the line and recirculating cold water back to the tank while you wait for the hot to come through the lines. That way, you are not wasting water. Tankless still intrigues me, but I am glad I stuck with the "tried and true" type and we never run out of hot water.
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Old 02-08-2009, 09:17 AM   #17
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I love the tankless water heater (TWH) concept and would love to add one as well. Do you know that this one is RV rated? I see where the ad states "Camping", but no other information is given. RV rated TWH's are available, but they do cost a pretty penny more than the published price for this unit.

Things move, shake, and rattle pretty good when a trailer is in tow. As such I would be very reluctant to install a gas appliance in my AS that was not rated for RV use.


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Old 02-08-2009, 09:22 AM   #18
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Has anyone taken out the old hot water heater and installed a compartment door there to cover up the old hole?
Take a look at this 1956 Flying Cloud - Access Doors
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Old 02-08-2009, 10:06 AM   #19
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Well thanks for all of the tips about doors....as far as the tankless issue we never boondock....we are always using full hook ups....and if we do boondock it is where there are shower facilities....we have been this way in our previous SOB and will be the same in the AS. Now with that said...we are still researching the tankless sytem...i found that tank through balrgn on his forum for the http://www.airforums.com/forums/f417...erd-46118.html and that is the system that he has purchased.....he has not added the unit as of yet.....This seems to be the best sized and priced out of the units that I have looked at so far. I would have went back with a "regular" water heater unit but it just took up way to much space and we would not have had any room in the cabinets. So now we are going with the tankless and going to try and install this in the cabinet that is in the rear bathroom. As we progress with this will keep everyone up on it. Most of our camping is done in between the spring and fall, so hopefully water temp will not be too big of an issue, but you never can tell.
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Old 02-08-2009, 04:13 PM   #20
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From what I am reading Kevin245 is right. I don't believe the unit you are considering is approved or suitable for RV use. The only one I have found that is, is expensive, but I would be careful about using the other one in an RV. Could void you insurance if there was a fire!

Here is a link to the approved unit.

RV 500 Recreational Vehicle Propane Gas Tankless Water Heater (LP). RV 500 on demand hot water heater by PrecisionTemp
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Old 02-08-2009, 06:03 PM   #21
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I have sent an email to this dealer to see if they have anything about Travel Trailers...to see what the response would be...I am still looking into other options for them.
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Old 02-08-2009, 06:19 PM   #22
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Rv 500

Be careful with a thankless water heater that is not approved for RV use. I installed the RV 500 which is an approved RV replacement. It fits in either the standard 6 gallon or 10 gallon water heater space and can be ordered with a great looking brushed aluminum cover. I have attached pdf files with pictures of my install (RV 500) and some additional info. It works great. The electronic sensor detects water movement in the hot water line and ignites the burner. With in 2 to 3 seconds you have hot water flowing. Turn off the water and the burner goes off. As long as you have a water supply and propane you have have hot water.

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Old 02-10-2009, 01:06 PM   #23
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This is part of the email that I got back from the tankless contact.....
Obviously, for a "mobile" unit you'd want to be sure there are no fragile components (which these have none) and fuel storage safety.
Since it opeates on LP gas, the source of gas is containerized in UL listed - tanks that are safe for travel trailers.One note: This unit does not have a standing pilot light, so there is only CO2 when the unit is operating I think that this is the tank that we are going to go with and see how it goes.
Sorry should really have said "tankless"!!!
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Old 02-12-2009, 12:03 PM   #24
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How does it vent

Quote:
Originally Posted by mouth012006 View Post
This is part of the email that I got back from the tankless contact.....
Obviously, for a "mobile" unit you'd want to be sure there are no fragile components (which these have none) and fuel storage safety.
Since it opeates on LP gas, the source of gas is containerized in UL listed - tanks that are safe for travel trailers.One note: This unit does not have a standing pilot light, so there is only CO2 when the unit is operating I think that this is the tank that we are going to go with and see how it goes.
Sorry should really have said "tankless"!!!
How does this unit vent to the outside when operating?

Don
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