Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 08-23-2014, 05:41 PM   #1
Junior Member
 
Join Date: Aug 2014
Posts: 1
Tankless hot water heater

We are looking at purchasing our first MH (possibly a Winnebago Vista which does not come with a tankless hot water system, only a 10 gallon hot water heater). We are interested in opinions on the Precision RV-550.
We are considering doing the installation ourselves. If not, does anyone know of a reputable RV service company in the Houston, Tx. area?
__________________

__________________
Red N Susan is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 08-23-2014, 05:44 PM   #2
Community Administrator
 
Clifftall's Avatar


 
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Aug 2009
Posts: 29,018
Welcome to irv2. I've moved your post here to get a broader view.
Cliff
__________________

__________________


Cliff,Tallulah and Buddy ( 1999-2012 )
Clifftall is offline   Reply With Quote
Old 08-23-2014, 06:26 PM   #3
Senior Member/RVM #90
 
MSHappyCampers's Avatar


 
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 25,800
Hi folks! Welcome to IRV2! We're sure glad you joined us!

Hope you find the right rig for your needs! Enjoy the forum!

Good luck, happy trails, and God bless!
__________________
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
MSHappyCampers is online now   Reply With Quote
Old 08-23-2014, 06:36 PM   #4
Senior Member
 
GunnyClark's Avatar
 
Thor Owners Club
Appalachian Campers
Join Date: Sep 2013
Location: West Virigina & Afghanistan
Posts: 103
Welcome to IRV2!!!

the wife and I have also talked about getting a tankless system but have not done very much research on it until I do a couple of other mods. Let us know how it turns out for you if you get a system
__________________
2012 Freedom Elite 26E V-10 E-450 Chassis, Tandem Tow Dolly HDXL hauling 2011 Harley Softail Convertible,2012 Yamaha V-Star & 2011 Jeep JK
GunnyClark is offline   Reply With Quote
Old 08-23-2014, 06:46 PM   #5
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,656
Ok tanked v/s tankless... With a tanked system you have hot water at all flow rates, and you can often use either gas or electric heat.. If you are in a park, as I am, where the electricity is included in the flat rate rental.. That's the way to heat water (On a metered site use gas).

Tankless at very low flow rates you may not trip the flow sensor (like the sail switch on the furnace if the flow is not good enough NO HEAT)

and they run on gas,, Running on on electric is theoretically possible but either only at very low flow rates or at very high power rates. The only one I have found that would fit inside my power consumption profile limits flow to like 1/4 Gallon per minute.. I need 1 GPM minimum to heat water for tomorrow's shower or.. My six gallon tank, either will work.

(Though the way the temps are today I am not sure I actually NEED to heat the water..... 100 in the shade, just leave the hose in the sun and ..)
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 08-23-2014, 06:58 PM   #6
Senior Member


 
Join Date: Aug 2011
Posts: 3,244
Quote:
Originally Posted by Red N Susan View Post
We are looking at purchasing our first MH (possibly a Winnebago Vista which does not come with a tankless hot water system, only a 10 gallon hot water heater). We are interested in opinions on the Precision RV-550.
We are considering doing the installation ourselves. If not, does anyone know of a reputable RV service company in the Houston, Tx. area?

Since you haven't bought an MH yet....why not look for ones with "aquahot" which is a tankless water heater and coach furnace all in one?
__________________
pasdad1 is offline   Reply With Quote
Old 08-23-2014, 07:02 PM   #7
Senior Member
 
Join Date: Feb 2002
Location: Aguanga, CA, USA
Posts: 238
The Precision Temp is a good unit (perhaps the best tankless RV WH), but a tankless WH may be somewhat at odds with your RV lifestyle, depending on whether you almost always have city water connection or if you sometimes dry-camp.

They are not very compatible with water conservation, since they require a substantial minimum flow of water to prevent on-off cycling of the burner (and thus of water temp). I believe it's 0.4 gal/min and that assumes a reasonably cool source water temp - if the source water is fairly warm the minimum flow required goes up.
__________________
jspande is offline   Reply With Quote
Old 08-23-2014, 08:36 PM   #8
RVM#87 / Senior Member
 
DieselTech39's Avatar


 
Solo Rvers Club
Join Date: Jul 2014
Location: Ham Lake, MN
Posts: 3,038


Glad you're aboard. Best of luck in your search and decision. Enjoy your adventures and be safe.
__________________
Have a wonderful day!
Ken (RVM 87)
FT DP Wanna B The journey is the destination!
Retired & perfecting procrastination!
DieselTech39 is offline   Reply With Quote
Old 08-23-2014, 09:26 PM   #9
Senior Member
 
Sky_Boss's Avatar


 
Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,068
Quote:
Originally Posted by wa8yxm View Post
...If you are in a park, as I am, where the electricity is included in the flat rate rental.. That's the way to heat water (On a metered site use gas)....
I don't want to spin this thread too far off but I suggest that, maybe, just maybe it is better to use electricity for water and general heating needs most of the time if electric is not included in the camping fee. It depends on the cost of electricity vs propane.

As an example, if electricity is $.12/kwh and propane is $3/gal and assuming the gas heating is only 60% efficient, the cost of 100,000 BTUs of heating is $3.52 for electricity and $5.42 for propane.

Comparison Calculator

No calculator is perfect. As an example, since heat pumps lose efficiency as temps drop, they may have to run longer than a gas furnace so that could skew the comparison a bit. It would also appear that electric heating is more cost effective than burning diesel for hydro heating systems too.
__________________
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is online now   Reply With Quote
Old 08-23-2014, 09:33 PM   #10
Senior Member
 
tricotec's Avatar
 
Monaco Owners Club
Join Date: Jan 2014
Location: Seattle, WA
Posts: 386
Quote:
Originally Posted by Sky_Boss View Post
I don't want to spin this thread too far off but I suggest that, maybe, just maybe it is better to use electricity for water and general heating needs most of the time if electric is not included in the camping fee. It depends on the cost of electricity vs propane.

As an example, if electricity is $.12/kwh and propane is $3/gal and assuming the gas heating is only 60% efficient, the cost of 100,000 BTUs of heating is $3.52 for electricity and $5.42 for propane.

Comparison Calculator

No calculator is perfect. As an example, since heat pumps lose efficiency as temps drop, they may have to run longer than a gas furnace so that could skew the comparison a bit. It would also appear that electric heating is more cost effective than burning diesel for hydro heating systems too.
The problem with using electricity for hot water tankless systems is that the amperage requirements to get satisfactory performance in an RV are too high. To match the BTU input of the Precision RV-550, you would need 28A of current at 110VAC!! More than most any production RV could handle! Most RV hot water systems including the aquahot and most propane/electric water heaters use a relatively small electric element to keep water hot during low use periods to save fuel. All of them consume fuel when you use hot water for anything more than washing your hands. To use tankless hotwater in an RV you'll need to either use propane or Diesel (in a DP rig) to get enough BTUs to heat enough water to take a shower. I highly recommend an aquahot system.

However the Precision RV-550 looks like it is specifically designed to replace a typical Suburban 6 gallon water heater. I can tell you that having unlimited hot water in an RV is WELL worth it and will improve your quality of life while in your RV. It's a must for full-timers. Keep in mind that you'll only benefit from these if you are in a park with an unlimited supply of water. If you camp in the wilderness you will quickly empty your fresh water tank if you indulge in long showers, and the small RV water heaters are fine for most "RV wet down and soap" showers. I'd love to hear from those who have one of these how well it works.
__________________
Bobby & William Mukaisu
2005 Monaco Windsor 40PST 400HP ISL Cummins
2014 Chevy Equinox LS
[SIGPIC][/SIGPIC]
tricotec is offline   Reply With Quote
Old 08-23-2014, 10:56 PM   #11
Senior Member
 
Lt Dan's Avatar


 
Tiffin Owners Club
Join Date: Sep 2013
Location: DFW, Texas
Posts: 1,621
Quote:
Originally Posted by Red N Susan View Post
We are looking at purchasing our first MH (possibly a Winnebago Vista which does not come with a tankless hot water system, only a 10 gallon hot water heater). We are interested in opinions on the Precision RV-550.
We are considering doing the installation ourselves. If not, does anyone know of a reputable RV service company in the Houston, Tx. area?
Do your research. Some friends of ours had a brand new 5th wheel that came with a tankless heater. Their second trip it caught fire and caused a lot of damage. After the repairs, the company replaced it with a standard heater and said they had had problems with tankless RV heaters.

Just for info, we have a 10 gallon WH that works on gas and/or electric. You can turn on both gas and electric at the same time and the recovery rate is very fast. Unless you take 20 minute showers, a 10 gallon WH may be enough for you because the water is hotter than a regular residential WH.

Just my $0.02 worth.
__________________
Dan & Ro with two Rescued Boston "Terrorists" Jade & Jewel
2017 Phaeton 40IH Maroon Coral - Power Glide Chassis with IFS (05/17)
Previously '15 Tiffin Allegro RED 38QRA and '06 Itasca Sunrise 35A
'12 Jeep Wrangler Sport and/or '08 Honda Goldwing
Lt Dan is offline   Reply With Quote
Old 08-24-2014, 09:42 AM   #12
Senior Member
 
Country Coach Owners Club
Retired Fire Service RVer's
Join Date: Feb 2013
Location: Ocala, Florida
Posts: 6,295
Welcome and glad to meet you!
__________________
FMCA #F431170, GS #822128658, Escapees SKP #112655
2012 Airstream Mercedes Interstate Class B
[SIGPIC][/SIGPIC]
Medico is offline   Reply With Quote
Old 08-24-2014, 10:28 AM   #13
Senior Member
 
PyrateSilly's Avatar
 
Monaco Owners Club
Join Date: Jul 2011
Posts: 2,200
We have a 10 gallon water heater. I can do dishes, Thom can take a shower and then I can take one ..... all within about an hour. The 10 gallon tank works just fine and we usually keep it on electric. If power is lost we will turn it off but usually it stays on electric.
The shower does have a shut off valve so that during the shower when we are soaping up and stuff and don't really need the water to just run we can stop the flow without turning it off completely. It helps tremendously to have the shut off on the shower head, it cuts down on water just flowing no where and helps with us being to use just the 10 gallons of hot to take showers. The tank may say 10 gallons but if you use the shut off valve then while you are doing whatever the tank is heating more water so that you should then again have a full tank by the time you turn the valve back on. The only time I have come close to running out of hot water is when I decided to just stand under the water and let it flow.


When we did have a stick house we did put in an electric tankless water heater. They are more efficient than a gas one. http://www.energystar.gov/ia/partners/prod_development/new_specs/downloads/water_heaters/Eemax_052907.pdf
The one we got for the house was also rated for cold weather since it was in MI. It worked great but while Thom and I remembered that just because you have endless hot water does not mean you should use endless hot water .... costs more money for some people because they forget that the more you use the more you will pay.
__________________

__________________
Thom and Christine having fun in a 1993 Monaco Crown Royale Signature Series 40ft 300hp RV. Towing a Fiat 500 Abarth and a Harley.
Our blogged repairs and travels
PyrateSilly is offline   Reply With Quote
Reply

Tags
heater, tank, water, water heater



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
Water leak on control valve. See pic Beeper Class A Motorhome Discussions 90 08-19-2014 09:13 PM
Hot Water Heater Boiling Regwal Class A Motorhome Discussions 18 07-28-2014 06:31 AM
Home Hot Water Heater Shutoff while gone Butte64 iRV2.com General Discussion 28 05-22-2014 07:24 AM
Water heater issue 1985 Allegro dtschacher Tiffin Motorhomes Owners Forum 2 01-18-2014 10:59 PM
Hot water heater by-pass 2014 Challenger bigdaddy5120 Thor Industries Owner's Forum 3 10-06-2013 04:37 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:36 AM.


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