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06-05-2008, 06:57 AM
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#1
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New Member
1964 24' Tradewind
Saint Joseph
, Missouri
Join Date: Jun 2008
Posts: 1
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Using Tankless water heater, possibly ventless type
My first post.
Having trouble getting pilot to stay lit, considering going to tankless LP, possibly LP elec combo water heater. Noticed one available says its ventless too, though very low output capacity. My trailer is a '64 Tradewind. Anyone use one of these or have any suggestions?
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06-05-2008, 07:41 AM
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#2
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Rivet Master
1956 22' Safari
2015 27' Flying Cloud
Vintage Kin Owner
Conifer/Evergreen
, Colorado
Join Date: Feb 2002
Posts: 12,701
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Make sure it's one rated for RV use, otherwise it ma rattle apart or be unsafe.
We are planning on using one from Precision Temp.
Shari
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06-05-2008, 01:07 PM
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#3
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Rivet Master
1975 29' Ambassador
Reno
, Nevada
Join Date: May 2003
Posts: 1,351
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The RV-500 precision temp is the only RV tankless water heater I have seen and it generally gets good reviews. Cost about $1k. fits in the same space a 10 gallon water heater does.
The RV-500 is a 50k BTU/hr heater which is about max for RV propane systems (11 in water column pressure and 3/8 inch tubing). That is barely sufficient for RV showers. It is equivalent to about 15 kilowatts or 8 standard 15 amp 120v household circuits. Electric just doesn't cut it unless you are talking 240v and high currents.
Venting is another issue. There are some gas powered water heaters that are not designed for external venting but they require larger spaces than is usual in an RV and special precautions - much like catalytic heaters. They are usually designed to serve as point of use water heaters for small volumes.
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06-05-2008, 01:28 PM
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#4
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_
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, .
Join Date: Dec 2004
Posts: 8,812
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hi careyB and welcome to the forums!!
member lewster only has a few 100 posts on this issue and his user/installer/service tech experience...
search 'tankless' with his user name and ALL the heated details will pour out...
i think he's on the road right now, and may not see your post...
cheers
2air'
__________________
all of the true things that i am about to tell you are shameless lies. l.b.j.
we are here on earth to fart around. don't let anybody tell you any different. k.v.
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06-26-2008, 01:23 PM
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#5
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2 Rivet Member
1971 25' Tradewind
houston
, Texas
Join Date: Apr 2007
Posts: 22
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hey guys..
i'm about to replace my water heater also. i just found this one at home depot.. Ariston 4.0 Gallon Point of Use Electric Water Heater - GL4.0 at The Home Depot
it only draws 12.5 amps on 120v. comes out to 1500 watts. not trouble for a 30 amp service or decent generator. at that price, if it doesnt work out in the AS, i could put it in the house for jenny's LONG HOT baths! not sure how it will hold up to rv use, but if i get a few years out of it, thats worth it to me! one turn on for me was that it's all electric.. and i'm going 100% elec in my tradewind. hopefully it will be installed this weekend so i can get some pics and details up while this post is fresh.
cody
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06-26-2008, 02:25 PM
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#6
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Rivet Master
2011 34' Classic
Westchester Cty.NY
, / Miami FL
Join Date: Jul 2007
Posts: 3,122
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scroll way down to the bottom of this thread and look at the related threads. you will find that the unit you mention is NOT safety rated for RV use.
__________________
Ricky
2012 F150 Super Crew 5-1/2' bed Ecoboost 4x4 3.73 elec. lock diff. Propride hitch
give life. kidney & pancreas transplant 9/9/06
Ingrid-my unofficial '"World's Oldest Streamer" 1909-2008 R.I.P.
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06-26-2008, 04:32 PM
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#7
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2 Rivet Member
1971 25' Tradewind
houston
, Texas
Join Date: Apr 2007
Posts: 22
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ok.. i stand corrected
after doing a little more reading in the add, this water heater HAS a tank(3.85 gal). still going to try it out. the design of this one is to assist a lager heater where more demand is needed, but with our little consumption, it shouldn't be a problem. anyway, just correcting my own mistake
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06-26-2008, 04:45 PM
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#8
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Rivet Master
1965 17' Caravel
1983 27' Excella
Walnut Grove/Laguna Woods
, California
Join Date: Jun 2004
Posts: 1,635
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We have a Precision Temp in our '65 Caravel. Works OK.
Up side: operates on 12v and propane, uses very little propane, does not sound like a tornado coming by your trailer, never heats water you are not using, never runs out of hot water, has freeze protection built in (comes on for a few seconds when needed in cold weather), fits in the same place and used the same connections as your old water heater. Customer service at Precision Temp is great.
Down side: not cheap to buy, wastes some water at each start-up (that's every time you turn on your faucet, an issue when boondocking), has two circuit boards and three temp sensors to go bad (had one board and two sensors go bad out of warranty, cost me $200.00), questionable AC at an RV park can cause noise in your 12v DC circuit and the unit will malfunction and not light (needs "reboot" by disconnecting the 12v)
Love it, and hate it.
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06-27-2008, 05:39 AM
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#9
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2 Rivet Member
1971 25' Tradewind
houston
, Texas
Join Date: Apr 2007
Posts: 22
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RV rated, huh?
hey jim, let me see if i understand this.. the expensive "rv rated" water heater you have is sensitve to noisy power, expensive to repair, and still wastes some water? no offense to any one using these, but i'm still gonna try a cheapo.. the cost of repairing yours would replace mine . hopefully i will have a chance to purchase and install this weekend, so we will see if the foot should go in the mouth or not.
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06-27-2008, 08:09 AM
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#10
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Rivet Master
1972 25' Tradewind
North Vancouver
, British Columbia
Join Date: Feb 2006
Posts: 3,421
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All water heaters will waste water. The amount depends on the volume of water standing in the run of pipe from heater to faucet.
__________________
Cameron & the Labradors, Kai & Samm
North Vancouver, BC
Live! Life's a banquet and most poor suckers are starving to death! - Mame Dennis
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06-27-2008, 08:54 AM
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#11
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Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
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Quote:
Originally Posted by Jim Foster
We have a Precision Temp in our '65 Caravel. Works OK.
Up side: operates on 12v and propane, uses very little propane, does not sound like a tornado coming by your trailer, never heats water you are not using, never runs out of hot water, has freeze protection built in (comes on for a few seconds when needed in cold weather), fits in the same place and used the same connections as your old water heater. Customer service at Precision Temp is great.
Down side: not cheap to buy, wastes some water at each start-up (that's every time you turn on your faucet, an issue when boondocking), has two circuit boards and three temp sensors to go bad (had one board and two sensors go bad out of warranty, cost me $200.00), questionable AC at an RV park can cause noise in your 12v DC circuit and the unit will malfunction and not light (needs "reboot" by disconnecting the 12v)
Love it, and hate it.
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Hi Jim, et al:
I have been using the RV-500 for 8 years, first in my 40' diesel pusher (full-timing) and then in my 19CCD A/S. I have NEVER had a problem with either unit, and they have performed flawlessly during this time.
They are the ONLY tankless water heater (to date) that is rated for RV use. Anything else is a crap shoot with your investment dollars and your safety.
Yes, they are expensive (check with me for the Forum Courtesy Discounted price ) but are well worth it if you are in this market.
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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06-27-2008, 11:36 AM
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#12
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Rivet Master
1965 17' Caravel
1983 27' Excella
Walnut Grove/Laguna Woods
, California
Join Date: Jun 2004
Posts: 1,635
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The water wasted by the RV500 over other water heaters is only the amount needed to get the flow meter going so that the unit knows that "this guy wants hot water, so I better turn this thing on." You can hear the unit fire on a second or two after you turn on the faucet. Never measured the amount of water, maybe a cup or two.
The unit was in our Caravel when we bought it.
I am not knocking the RV500 in any way. Only giving the full measure of our experience with our unit. Both the good and the bad. Ours is a very early unit. It is #38. When we had it repaired at the Precision Temp factory in Ohio, the fellow who made our unit was still working there and did the repair.
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04-11-2009, 04:22 AM
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#13
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4 Rivet Member
1977 31' Sovereign
Manchester
, New Hampshire
Join Date: May 2006
Posts: 347
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Quote:
Originally Posted by Leipper
The RV-500 precision temp is the only RV tankless water heater I have seen and it generally gets good reviews. Cost about $1k. fits in the same space a 10 gallon water heater does.
The RV-500 is a 50k BTU/hr heater which is about max for RV propane systems (11 in water column pressure and 3/8 inch tubing). That is barely sufficient for RV showers. It is equivalent to about 15 kilowatts or 8 standard 15 amp 120v household circuits. Electric just doesn't cut it unless you are talking 240v and high currents.
Venting is another issue. There are some gas powered water heaters that are not designed for external venting but they require larger spaces than is usual in an RV and special precautions - much like catalytic heaters. They are usually designed to serve as point of use water heaters for small volumes.
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Hey what about the wind kit and freeze kit is it worth it for the RV-500 ?
I ordered this heater and got a call from the place I ordered from and they said they recommend the wind kit and freeze kit is it really nessesary ?
__________________
1976 Airstream Sovereign International Landyacht (renovating)(found DOM plate said 1976)
1968 Airstream Caravel 17 footer
2004 Nissan Titan with BT package
K/N Cool intake air
Duel power exhaust
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04-11-2009, 07:05 AM
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#14
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Aluminut
2004 25' Safari
.
, Illinois
Join Date: Feb 2003
Posts: 10,477
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Here is the info off the company website:
RV-500 Accessories
Wind Protection Fan #1703
The RV-500/501 can be affected by swirling or gusting winds.
Gusting winds may affect the consistency of the water temperature.
Slide-out compartments that are on the same side as the water
heater will create turbulences. If you have a slide-out room on the
same side as the water heater you need the Wind Protection Fan. In
some circumstances, the internal wiring can become singed.
If you have a slide-out room or use your RV where wind gusts are
common such as the desert or shore areas or use your RV at high
altitudes, the Wind Protection Fan is strongly recommended. The
Wind Protection Fan can be easily retrofitted.
_______________________________________________
Cold Weather Package #1966 (includes #1703 Wind Protection
Fan)
Instantaneous water heaters only come on when you turn on the hot
water tap. Therefore, anytime the temperature drops to 32˚F (0˚C),
they are susceptible to freeze damage. The RV-500/501, however,
will turn itself on* for short periods of time as the temperature
approaches freezing. This will protect the unit down to temperatures
of 20˚ F (-6˚C). If it will be used in temperatures lower than this the
Cold Weather Package is required.
The Cold Weather Package includes heating wire with a plug-in,
insulation and the Wind Protection Fan. The Cold Weather Package
will protect the RV-500/501 at temperatures as low as -20˚F (-
29˚C).**
The Cold Weather Package is a factory installed option.
*If power and gas are left on.
** If plugged in and the power and gas are left on.
My guess is that if you RV in the winter where the outside temp will reach freezing, then you need the cold weather package. This also begs the question that if you boondock in temps at or below freezing, it would seem to me with the cold weather package you'd need to have ample power to run this long term.
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04-11-2009, 07:24 AM
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#15
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4 Rivet Member
1977 31' Sovereign
Manchester
, New Hampshire
Join Date: May 2006
Posts: 347
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What if you drain water for the winter?
Quote:
Originally Posted by Silvertwinkie
Here is the info off the company website:
RV-500 Accessories
Wind Protection Fan #1703
The RV-500/501 can be affected by swirling or gusting winds.
Gusting winds may affect the consistency of the water temperature.
Slide-out compartments that are on the same side as the water
heater will create turbulences. If you have a slide-out room on the
same side as the water heater you need the Wind Protection Fan. In
some circumstances, the internal wiring can become singed.
If you have a slide-out room or use your RV where wind gusts are
common such as the desert or shore areas or use your RV at high
altitudes, the Wind Protection Fan is strongly recommended. The
Wind Protection Fan can be easily retrofitted.
_______________________________________________
Cold Weather Package #1966 (includes #1703 Wind Protection
Fan)
Instantaneous water heaters only come on when you turn on the hot
water tap. Therefore, anytime the temperature drops to 32˚F (0˚C),
they are susceptible to freeze damage. The RV-500/501, however,
will turn itself on* for short periods of time as the temperature
approaches freezing. This will protect the unit down to temperatures
of 20˚ F (-6˚C). If it will be used in temperatures lower than this the
Cold Weather Package is required.
The Cold Weather Package includes heating wire with a plug-in,
insulation and the Wind Protection Fan. The Cold Weather Package
will protect the RV-500/501 at temperatures as low as -20˚F (-
29˚C).**
The Cold Weather Package is a factory installed option.
*If power and gas are left on.
** If plugged in and the power and gas are left on.
My guess is that if you RV in the winter where the outside temp will reach freezing, then you need the cold weather package. This also begs the question that if you boondock in temps at or below freezing, it would seem to me with the cold weather package you'd need to have ample power to run this long term.
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If you blow out water you should not have a problem correct?
__________________
1976 Airstream Sovereign International Landyacht (renovating)(found DOM plate said 1976)
1968 Airstream Caravel 17 footer
2004 Nissan Titan with BT package
K/N Cool intake air
Duel power exhaust
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04-11-2009, 07:55 AM
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#16
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Aluminut
2004 25' Safari
.
, Illinois
Join Date: Feb 2003
Posts: 10,477
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That is correct, but if you are using the unit in freezing temps, then are you really going to go out and blow out the unit after each use? If you are not, nor are you ever going to use this in 32F or lower, then yes, simply blow it out at the end of each season similar to what each of us frozen tundra dwellers do every year.
Since this is not like a tank heater that stays warm and is an on demand, water will stay in the heater and not be heated until a call for hot water is made. That means that water will sit in that unit, even though it does do trickle heat when it is cold. The company seems to be saying that the trickle heat in low temps is not good enough for 32F or below, and thus the need for the cold package?
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04-11-2009, 08:20 AM
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#17
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4 Rivet Member
1977 31' Sovereign
Manchester
, New Hampshire
Join Date: May 2006
Posts: 347
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Ok what if trailer is heated ?
Quote:
Originally Posted by Silvertwinkie
That is correct, but if you are using the unit in freezing temps, then are you really going to go out and blow out the unit after each use? If you are not, nor are you ever going to use this in 32F or lower, then yes, simply blow it out at the end of each season similar to what each of us frozen tundra dwellers do every year.
Since this is not like a tank heater that stays warm and is an on demand, water will stay in the heater and not be heated until a call for hot water is made. That means that water will sit in that unit, even though it does do trickle heat when it is cold. The company seems to be saying that the trickle heat in low temps is not good enough for 32F or below, and thus the need for the cold package?
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What if when you use it your using heat and when not using the heat you blow out water. What I am really going to be using the trailer for is a place to stay when i go snowmobling for like the weekends or vacation. I purchased the bigger furnace also 40000 btu which branches off to all three tanks to keep heated and has a vent in bathroom .I could also isolated the HWH so i can just blow that out making it easyier install of draining whole system. I have run all PEX throught the trailer.
__________________
1976 Airstream Sovereign International Landyacht (renovating)(found DOM plate said 1976)
1968 Airstream Caravel 17 footer
2004 Nissan Titan with BT package
K/N Cool intake air
Duel power exhaust
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05-02-2009, 11:26 AM
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#18
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New Member
Spanish Fork
, Utah
Join Date: May 2009
Posts: 1
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RV500 Tankless water heater
I just installed a RV500. It works fine when the access door is off, but won't stay lit when the door is on. Can anyone tell me how to correct this problem?
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07-26-2011, 08:37 PM
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#19
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1 Rivet Member
1958 22' Custom
Paradise
, California
Join Date: Nov 2010
Posts: 8
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I'm getting ready to buy a tankless hot water heater for my 1958 Flying Cloud. Looking at both the Girard and Precision models, which differ in price range considerably (Girard 650$ vs Precision 1,000$)
Anyone out there have any recommendations? Thanks! Ann
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05-12-2014, 08:04 AM
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#20
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2 Rivet Member
2014 27' FB International
Santa Rosa
, California
Join Date: Jul 2013
Posts: 29
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Tankless Water Heater replacement
Thanks for these insights. Has anyone replaced the existing water heater in a newer model, i.e. 2014 International 28'. We have it torn apart for a remodel and would like to change the existing one out.
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