|
08-31-2014, 04:43 PM
|
#1
|
3 Rivet Member
1972 Argosy 26
1973 Argosy 26
Fairmont
, West Virginia
Join Date: Jan 2009
Posts: 249
|
On Demand Water Heat???
I am looking to Upgrade from the Suburban 6 gallon Water Heater (LP Eater) To a On Demand Water Heater. Anyone have any experience in this area?
|
|
|
08-31-2014, 05:06 PM
|
#2
|
Rivet Master
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton
, Arkansas
Join Date: Mar 2013
Posts: 5,868
|
My experience is limited to a residential unit installed in my Sovereign. It works well, but does not work with 12 volt, I run it on an inverter.
__________________
The fact that I am opinionated does not presuppose that I am wrong......
|
|
|
08-31-2014, 05:12 PM
|
#3
|
Rivet Master
1988 25' Excella
1987 32' Excella
Knoxville
, Tennessee
Join Date: Oct 2010
Posts: 5,118
|
I personally would not consider it an upgrade based on my experience with a residential on demand unit.
|
|
|
08-31-2014, 05:14 PM
|
#4
|
Rivet Master
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton
, Arkansas
Join Date: Mar 2013
Posts: 5,868
|
On Demand Water Heat???
I wouldn't want one in a residence, but in a trailer not running out of hot water after 6 or 12 gallons is a bonus.
Mine has been in my trailer for over a year and has thus far proven reliable enough.
__________________
The fact that I am opinionated does not presuppose that I am wrong......
|
|
|
08-31-2014, 08:04 PM
|
#5
|
Rivet Master
Port Orchard
, Washington
Join Date: May 2009
Posts: 4,463
|
Quote:
Originally Posted by J. Morgan
My experience is limited to a residential unit installed in my Sovereign. It works well, but does not work with 12 volt, I run it on an inverter.
|
Does it heat the water with the inverter output, or does it just use the 120 vac for control voltage and heat the water with propane?
Ken
|
|
|
08-31-2014, 08:07 PM
|
#6
|
Rivet Master
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton
, Arkansas
Join Date: Mar 2013
Posts: 5,868
|
On Demand Water Heat???
It just uses the 120 for control, it heats with propane. The one I bought claims 6 gpm, and requires a 3/4" gas line.
There is a 3 gpm unit on Overstock.com for less than $300 with good reviews.
(Ecotemp)
__________________
The fact that I am opinionated does not presuppose that I am wrong......
|
|
|
08-31-2014, 08:18 PM
|
#7
|
Rivet Master
Port Orchard
, Washington
Join Date: May 2009
Posts: 4,463
|
Quote:
Originally Posted by J. Morgan
It just uses the 120 for control, it heats with propane. The one I bought claims 6 gpm, and requires a 3/4" gas line.
There is a 3 gpm unit on Overstock.com for less than $300 with good reviews.
(Ecotemp)
|
Here's a 1.4 gpm for $130. I have no idea how many gpm is required to, for instance, take a shower.
Portable Tankless Propane Water Heater | Overstock Shopping - Big Discounts on Eccotemp Water Heaters
Ken
|
|
|
08-31-2014, 08:25 PM
|
#8
|
Rivet Master
2014 31' Classic
2015 23' International
2013 25' FB International
Apache Junction
, Arizona
Join Date: Sep 2012
Posts: 6,223
|
There are reduced flow shower heads from third parties for Airstreams. I would think the minimum flow one would need to be 3 gpm for a shower. We have a 7.5 fpm unit at the house with 1.25" pipe to the unit for natural gas flow and then 0.75" into the heater.
The shower heads have a gpm rating.
Here is an example that one sees at Camping World in chrome rated at 2 fpm:
http://oxygenics.com/products/bodysp...th-smartpause/
__________________
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic w/ twin beds, 50 amp service, 1000 watt solar system, Centramatics, Tuson TPMS, 12" disc brakes, 16" tires & wheels
|
|
|
08-31-2014, 09:06 PM
|
#9
|
3 Rivet Member
1972 Argosy 26
1973 Argosy 26
Fairmont
, West Virginia
Join Date: Jan 2009
Posts: 249
|
Anoyone have knowledge of RV Style On Demand Hot Water Heaters Such as the Atwood?
Atwood on-demand water heaters are available in 45,000 and 50,000 btu models. These water heaters provide a continuous hot water experience similar to that in your home, but are designed specifically for RVs. Ultra high output burners are powerful enough to instantly heat and let you enjoy a full flow of continuous hot water. To operate, simply turn on the hot water all the way and then mix in cold to reach your desired temperature. The tankless design not only saves weight, but also saves energy by only using power when hot water is demanded. Flex-fit flanges allow for an easy fit into the existing opening for most brands and sizes of RV tank or tankless water heaters. Door sold separately.
|
|
|
08-31-2014, 10:10 PM
|
#10
|
Rivet Master
1969 29' Ambassador
brooksville
, Florida
Join Date: Nov 2008
Posts: 1,270
|
On Demand Water Heat???
I have and installed a girard on demand hot water heater, with the adjustable temp knob. Works pretty good so far. I did a review on it in the past on the this forum. Atwood also has one, but it is more $.
If you are a full hook up camper then it works great, if your a boon docker, the flow rate requirement is not great. But if you have full hook up it's not a problem.
So the stats..
12vt power to fire up the gas
Runs on propane
3/8 line required, if my memory is correct.
Sent from my iPhone using Airstream Forums
__________________
Not all those who wonder are lost.
|
|
|
09-01-2014, 06:55 PM
|
#11
|
3 Rivet Member
1972 Argosy 26
1973 Argosy 26
Fairmont
, West Virginia
Join Date: Jan 2009
Posts: 249
|
Quote:
Originally Posted by Silverflames
I have and installed a girard on demand hot water heater, with the adjustable temp knob. Works pretty good so far. I did a review on it in the past on the this forum. Atwood also has one, but it is more $.
If you are a full hook up camper then it works great, if your a boon docker, the flow rate requirement is not great. But if you have full hook up it's not a problem.
So the stats..
12vt power to fire up the gas
Runs on propane
3/8 line required, if my memory is correct.
Sent from my iPhone using Airstream Forums
|
You say flow rate not great? Does that mean when on (Tank) water that it doesn't heat well or slows the flow even more so?
|
|
|
09-02-2014, 06:43 AM
|
#12
|
Rivet Master
1969 29' Ambassador
brooksville
, Florida
Join Date: Nov 2008
Posts: 1,270
|
To heat the water, there needs to be enough water running through the pipe to fire it up (flow rate.). With the adjustable knob that the newer unit has it helps out quite a bit. I think the required flow rate is 1.4 gal per min. So far the Garard has been working great for us.
Sent from my iPhone using Airstream Forums
__________________
Not all those who wonder are lost.
|
|
|
09-02-2014, 08:54 AM
|
#13
|
Rivet Master
2014 31' Classic
2015 23' International
2013 25' FB International
Apache Junction
, Arizona
Join Date: Sep 2012
Posts: 6,223
|
In the UK, we have on demand heaters at each shower (their electric power is much different that ours). The way the temperature is regulated is by a water flow control valve. The element (or the gas burner in the trailer models under discussion) produces a fixed amount of BTUs of heat, slower water flow, hotter water. Slower means less pressure hitting you in the face.
__________________
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic w/ twin beds, 50 amp service, 1000 watt solar system, Centramatics, Tuson TPMS, 12" disc brakes, 16" tires & wheels
|
|
|
09-02-2014, 08:57 AM
|
#14
|
Rivet Master
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton
, Arkansas
Join Date: Mar 2013
Posts: 5,868
|
The burner on my unit is variable over a wide range.
I don't know what the low limit is, but it is low enough that I can comfortably shower on the pump.
__________________
The fact that I am opinionated does not presuppose that I am wrong......
|
|
|
09-02-2014, 09:37 AM
|
#15
|
Rivet Master
1964 22' Safari
modesto
, California
Join Date: Jul 2010
Posts: 1,097
|
When we resurrected our 64 Safari. I installed a Twin Temp Junior from Precision Temp. It does both hydronic space heat and (on demand hot water). It is fantastic in both regards. The wife likes long showers, or baths and we have never ran out of hot water. Great for booney camping also. Shermantic, For your application Precision Temp also has stand alone (on demand) tankless water heating systems that are either floor vented or wall vented units. URL, PrecisionTemp - Tankless Hot Water and Heaters for RVs, Boats and More. I hear Aqua Hot is also a very good product and Atwood has been around for a long time. I suggest doing some research. Precision Temp is made in the US and there customer service is great. I had a question on a Sunday so I called and left a VM and got a call back in 10 minutes, by the design engineer. Who does that now days? Best of luck with your search.
-Dennis
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|