Tankless Hot Water Heater Help - Page 2 - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-04-2015, 12:08 PM   #15
Senior Member
 
Name: JD
Trailer: Scamp 16 Modified (BIGLY)
Florida
Posts: 1,045
I am working on redoing my Scamp 16 and I am planning on installing an L5 takless on the box on the tongue of the new frame. The only problems I am dealing with (thinking stage) is the adjustment. I have not tried a unit myself, but a guy at work had several on his barbecue trailers and loves them.
I an redoing lots of things on this trailer and I have considered mounting the heater on the front of the trailer on/behind a thin stainless sheet to block the wind, but allow some extensions to the control knobs so the they can be adjusted from the shower in the front.
This is a work in (initial) progress so lots will change.
I don't think installing one inside the camper is a starter with the open combustion and no vent.
For a little more money a system with intake and exhaust could be bought, but that puts you close to the Gerard (sp).
This bears more looking into for me.
__________________

__________________
redbarron55 is offline   Reply With Quote
Old 02-04-2015, 12:15 PM   #16
Junior Member
 
Name: Joe
Trailer: building
Georgia
Posts: 29
-
i'm thinking of using the L5 kit from amazon. it uses a small battery and can uses as small or large a propane bottle as needed. the kit provides the water pressure needed without a city hookup. i think it's a very nice design.
Eccotemp Systems L5 Pump/Strainer bundle L5 Tankless Water Heater with Flojet Pump and Strainer - Portable Camping Shower Gear - Amazon.com


.

-
__________________

__________________
wessonjoe is offline   Reply With Quote
Old 02-05-2015, 10:21 AM   #17
Member
 
Rusty99's Avatar
 
Name: Russ
Trailer: 1972 & 1978 Bolers 13ft
Alberta
Posts: 32
The Eccotemp looks like an interesting little system.

My main objective is to have hot water for the sink and the occasional shower. I like the idea that it can run off batteries.

Has anyone used the Excel tankless heaters? I like the idea that they are ventfree.
http://www.amazon.com/Excel-tankless.../dp/B007ZK4G1W
__________________
Rusty99 is offline   Reply With Quote
Old 02-05-2015, 12:00 PM   #18
Senior Member
 
Bob Miller's Avatar
 
Name: Bob
Trailer: 1973 Hunter Compact II
California
Posts: 7,912
Here's a link to the vendors page: Gas Heaters
Please note that excelAMERICA shows a nice American flag, but most of it's products, including this one, are from China.

Next: The unit is 16" high and requires an unmentioned open space above the unit to disburse its substantial exhaust heat (per several mentions in Amazon customer comments) but the mfg does not make installation instructions available on-line, and the reference for those instructions is West Marine, who no longer lists the item.


It also uses a oxygen depletion sensor, precluding mounting it in a compartment.

And last, at full flow, it's temperature rise is only 40 degrees. Although the vendor claims in one ad that it is a $500 item, they are selling them for less than 1/2 that, as are others.

Bottom line, know what you are getting before you buy.
Or at least buy from a source you know you can make a return to.....
__________________
Bob Miller is offline   Reply With Quote
Old 02-05-2015, 12:54 PM   #19
Member
 
Rusty99's Avatar
 
Name: Russ
Trailer: 1972 & 1978 Bolers 13ft
Alberta
Posts: 32
Quote:
Originally Posted by Bob Miller View Post
Here's a link to the vendors page: Gas Heaters
Please note that excelAMERICA shows a nice American flag, but most of it's products, including this one, are from China.

Next: The unit is 16" high and requires an unmentioned open space above the unit to disburse its substantial exhaust heat (per several mentions in Amazon customer comments) but the mfg does not make installation instructions available on-line, and the reference for those instructions is West Marine, who no longer lists the item.


It also uses a oxygen depletion sensor, precluding mounting it in a compartment.

And last, at full flow, it's temperature rise is only 40 degrees. Although the vendor claims in one ad that it is a $500 item, they are selling them for less than 1/2 that, as are others.

Bottom line, know what you are getting before you buy.
Or at least buy from a source you know you can make a return to.....

Great advice Bob! I appreciate your insight into this topic.
__________________
Rusty99 is offline   Reply With Quote
Old 02-05-2015, 07:41 PM   #20
Senior Member
 
Name: JD
Trailer: Scamp 16 Modified (BIGLY)
Florida
Posts: 1,045
I think that you will find that although some of the tankless demand water heaters have oxygen depletion sensors they suggest a pretty large cubic foot volume for use indoors.The volume required is probably 50 times what we have in the eggs.
I have seen a you tube about installing one under counter in an RV While the poster makes good points about the amount of fuel used compared with ovens and burners in the kitchen this is not an application (pretty well sealed) in an RV.
This is the reason I am planning installing one on the tongue or on the outside of the shell.
My thought is that it could be installed on a U shaped piece of stainless with the controls towards the shell in front of the the shower. Then extend the control shafts through the wall where they could be adjusted from the bathroom.
Since I am removing the front window and scarfing a fiberglass panel in it's place this could be the place to mount the heater outside and adjust from inside!
I don't think the heat would be a problem near the fiberglass since the heater is pretty efficient and the output temp would be relatively low.
__________________
redbarron55 is offline   Reply With Quote
Old 02-06-2015, 08:11 AM   #21
Junior Member
 
Name: Joe
Trailer: building
Georgia
Posts: 29
L5 exhaust

-
the L5 comes with a baffle to redirect the exhaust.
if the unit is placed inside with the exhaust properly redirected to the exterior without melting the fiberglass shell, it is possible to be safe.
the wieght and fuel savings are worth the effort.
happy DIYing!


.


-
__________________
wessonjoe is offline   Reply With Quote
Old 02-06-2015, 08:51 AM   #22
Member
 
Rusty99's Avatar
 
Name: Russ
Trailer: 1972 & 1978 Bolers 13ft
Alberta
Posts: 32
Quote:
Originally Posted by Bananaman View Post
Rusty, Also being here in Alberta I am going to pick up 'BaseCamp' unit at Cabelas for $400. Works on either electric or propane. It will work for me.
Ken, this looks like an excellent solution for the Boler. If it works as well as the reviews say.
Base Camp Companion Aqua Cube Hot Water System | Cabela's Canada

This video explains it nicely
__________________
Rusty99 is offline   Reply With Quote
Old 02-06-2015, 09:50 AM   #23
Senior Member
 
Name: None
Trailer: None
None
Posts: 2,727
fuel savingz

Quote:
Originally Posted by wessonjoe View Post
-
the L5 comes with a baffle to redirect the exhaust.
if the unit is placed inside with the exhaust properly redirected to the exterior without melting the fiberglass shell, it is possible to be safe.
the wieght and fuel savings are worth the effort.
happy DIYing!


.


-
We operate our water heater in the same manner as Bob Miller .IE Turn it on for a short period in the morning giving us hot water all day for washing dishes .If we plan to take a shower in the evening ,we again turn on the water heater for a short period and shower . Our standby losses are minimal . It takes the same amount of energy to heat X amount of water X number of degrees whether you are using a standard water heater or a tankless water heater . Thus my question "WHAT ENERGY SAVINGS ?" Also when we travel our water tank & water heater are empty so again "WHAT WEIGHT SAVINGS?" What difference does water weight make when you are stationary at a campsite.? The logic expressed for using a tankless water heater just for the sake of using a tankless water heater escapes me

PS I have installed hundreds of tankless water heaters and have taken 1/2 of them back out because they would not function as desired . No water heating system is 100% perfect
__________________
steve dunham is offline   Reply With Quote
Old 02-06-2015, 10:19 AM   #24
Senior Member
 
Bob Miller's Avatar
 
Name: Bob
Trailer: 1973 Hunter Compact II
California
Posts: 7,912
Yep, as Steve mentioned, that is what works for us. And with electric start, I can get hot water going without even getting out of bed in the morning.


We don't drain our 4 gallon heater tank when travelling, but a few lbs either way is a worry I won't consider, I can always empty the wine cellar or the hot tub to compensate.
__________________
Bob Miller is offline   Reply With Quote
Old 02-09-2015, 07:19 AM   #25
Junior Member
 
Name: Joe
Trailer: building
Georgia
Posts: 29
why what??

-
i fail to understand the reasoning for all the animosity here.
the tankless weighs much, much less than a tank + heater.
the tankless uses less gas or electricity than the other.
if a person has decided that one type is better for the intended application, why must the ensuing dicussion be geared towards reorienting that persons ideals.
i appreciate the pros and cons presented for each system.
yet i am resolute that the tankless is better.
now shall we please get on to WHICH tankless is better and WHY ? ? ?
thank you for your understanding.


.

-
__________________
wessonjoe is offline   Reply With Quote
Old 02-09-2015, 08:45 AM   #26
Senior Member
 
Bob Miller's Avatar
 
Name: Bob
Trailer: 1973 Hunter Compact II
California
Posts: 7,912
I think that the discussions are healthy as it often seems that the OPs in many of these threads start out completely oblivious to the real nature of tankless LP water heaters as might be used in FGRV's. (For this post I am setting aside the issue of electric tankless heaters as they are designed for a different purpose.)


In most discussions it seems that the small size and low price of certain tankless water heaters trumps considering the conventional RV water heater, and that real or imagined advantages, such as weight and fuel savings, are thrown up to cloud the disadvantages.


For those that really want to save fuel & weight, there are tankless water heaters in the $500 range, that can do the job, weigh less than a conventional water heater, allege to save fuel & water, and sound like a F16 in afterburner when fired off.


And there are the much less expensive tankless units that, are clearly labeled for outside or well ventilated space use only, are usually known to have variations in temperature based on water flow rates, and really have very few FGRV application users.


However, as conservation of resources seems to be a primary advantage, can anyone present any daily consumption and $$$ figures that show how much fuel is actually saved in a typical FGRV application?


Our hi-tech answer to LP conservation, using a conventional water heater, is simply that we turn it off when it's not needed. Two heating cycles a day seem to take care of our entire needs for hot water, adding daily showers for two might require one additional cycle. And, by planning ahead about 15 minutes, we can always have hot water when we need it.


One would suppose if a user was spending 18 or more hours a day inside an FGRV, had an unlimited source of water, as well as a way to dispose of it and/or was in a situation where replenishing LP fuel were all issues, that saving a modicum amount of LP could be an advantage.


But, based on comments about temperature variation due to flow rate changes, I would guess that more fuel & water may actually be used adjusting temp and waiting for temps to stabilize.


However, for the majority on this site that don't fit any/all of those criteria, I just don't think that the many disadvantages of those tankless water heaters being discussed come close to offsetting any advantages.


If anyone can present some documented proof otherwise it would be welcomed by many.


Keep in mind, that if someone starts a thread that others have opinions about, such as tankless water heaters, towing over mfgs. limits, maximum speed on SP tires, electrical systems and just about any other aspect of RVing, that they may get replies that don't agree with or are in conflict with others opinions and, heaven forbid, might actually drift off-topic. One can't expect to be able to control replies, or even the direction of discussion, it's the nature of this beast.....


As this site is primarily intended for those with Molded Fiberglass Travel Trailers, the replies to questions should be expected to reflect their needs and issues. For those with other agendas & interests, there are other sites that may be more understanding of different needs and beliefs.


And last; Disagreement & differing opinions do not equal animosity.
__________________
Bob Miller is offline   Reply With Quote
Old 02-09-2015, 08:59 AM   #27
Senior Member
 
Bob Miller's Avatar
 
Name: Bob
Trailer: 1973 Hunter Compact II
California
Posts: 7,912
So as to not get lost in my last extended post. The unit that WessonJoe expressed interest in, the L5, is really in the category of "Camp Showers" is called a Portable Hot Water System, and is really an entirely different topic.
I used a ZODI before installing a water heater in the Hunter and it works fine for that purpose.
__________________
Bob Miller is offline   Reply With Quote
Old 02-09-2015, 10:03 AM   #28
Senior Member
 
David Tilston's Avatar
 
Name: Dave W
Trailer: Trillium 4500 - 1977, 1978 (2), 1300 - 1977, 1973, and a 1972
Alberta
Posts: 5,314
Registry
I find myself coming around to Bob's point of view. If heating 5 gal, (how big is your heater Bob?) of water meets the required need in a few minuets, What is the advantage of an on demand unit?
Quote:
Originally Posted by wessonjoe View Post
-
the tankless weighs much, much less than a tank + heater.
The tank on a standard heater is aluminum, it is not very heavy. I have handled a burst tank from such a heater, and I was surprised how light it was. Now, most people likely don't drain their hot water heater. so I will acknowledge this advantage. You may be correct if you had said that the tankless versions take up less space.

Quote:
Originally Posted by wessonjoe View Post
the tankless uses less gas or electricity than the other.
Not if the water heated in the cycle is used up before it gets cold. Adjusting the temperature of an on demand heater may use up more gas then the lost heat through the insulation of the tank. So, no advantage.

Quote:
Originally Posted by wessonjoe View Post
if a person has decided that one type is better for the intended application, why must the ensuing dicussion be geared towards reorienting that persons ideals.
If that person has made a decision based on false claims or flawed logic, then that persons ideals require reorienting. Disputing claims is what discussion is about.

Quote:
Originally Posted by wessonjoe View Post
i appreciate the pros and cons presented for each system.
yet i am resolute that the tankless is better.
Sounds like faith. Not what what we deal with here.

Quote:
Originally Posted by wessonjoe View Post
now shall we please get on to WHICH tankless is better and WHY ? ? ?
thank you for your understanding.
Thank you for your understanding.

Quote:
Originally Posted by wessonjoe View Post
-
i fail to understand the reasoning for all the animosity here.
I gotta say, this post had the most animosity, by far, of all the posts on this thread. Hence my argumentative response.
__________________

__________________
David Tilston is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Tankless water heater Lowpaidnurse Modifications, Alterations and Updates 53 08-22-2017 12:01 PM
Camp Chef tankless water heater anybody? brownrecluse Modifications, Alterations and Updates 16 07-06-2015 11:26 PM
Tankless Water Heater Darwin Maring General Chat 0 11-30-2012 02:54 PM
Tankless Instant Shower Water Heater Lisa H. General Chat 10 06-14-2008 06:32 PM
Tankless Instant Shower Water Heater Lisa H. Modifications, Alterations and Updates 0 12-31-1969 07:00 PM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:39 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.