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Joined: Sep 2014
Posts: 21,796
Campfire Ranger
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Campfire Ranger
Joined: Sep 2014
Posts: 21,796 |
A friend put one in. Now, his new low flow shoiwer on the opposite side of the house doesn't get hot water. It doesn't use enough to cycle the heater. Same with his sink. In order to get hot water in either, if no one is running water, he has to turn them both on. The low flows force him to waste water!  Hot water!  Not exactly the heater, just a funny situation.
Parents who say they have good kids..Usually don't!
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Joined: Jan 2010
Posts: 580
Campfire Regular
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Campfire Regular
Joined: Jan 2010
Posts: 580 |
Are these worth the installation cost? Buying our retirement home, and it has a water heater (75 gallon) in the attic.Second floor heated by an AquaTherm system. Don't really like that idea, whole bunch of water that could escape.. Running on propane. Plenty of room in the laundry room, gas and water piping present. Only issue would be the vent, might have to go up through the ceiling into the second floor attic then to the roof. I suppose it could be mounted in the same spot in the attic as well. In AR, so temps are moderate for the most part. Well water, no idea of its temp right now. Going to replace the older HVAC systems (two split units) so don't need the 75 gallon tanked one anymore. The propane/NG ones are damn good and reliable. Since it is tankless it is less risk than the old style in attic. Just leave there as the vent pipe for these is critical and expensive (shorter distance is better). I will send you a pic of the one I put in our outdoor bathroom...I can recommend it.
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Joined: Oct 2007
Posts: 5,468
Campfire Tracker
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OP
Campfire Tracker
Joined: Oct 2007
Posts: 5,468 |
Yes, on demand. electronic control. If the power is out it will not work. Same as the tanked water in my current house. Kitchen is far away from the heater takes a couple of minutes for really hot water to get there. The retirement house is on a well, so not paying for water. Could live with a time delay for hot water.
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Joined: Jan 2001
Posts: 29,855
Campfire Ranger
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Campfire Ranger
Joined: Jan 2001
Posts: 29,855 |
Yes. Attic mount is a bad idea here in SE Oregon. I also view my 80 gal system and 2 toilet tanks as an emergency water supply.
Have a neighbor that does cost/benefit assays on the most trivial of items. For just a husband and wife, such does not pay. For a family of 5 with lots of trivial hand/face washings etc, there's a slight advantage if water has a long run from the big heater.
Last edited by 1minute; 02/20/21.
1Minute
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Joined: Jun 2001
Posts: 1,998
Campfire Regular
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Campfire Regular
Joined: Jun 2001
Posts: 1,998 |
Have a 40 gal in the garage. Wanted tankless but water piping to house not big enough. Would have cost too much as garage is on opposite side of house from water house inlet. Besides during this unexpected deep freeze have heard some of the tankless water heaters burst. Also, in my case the water supplier could not keep steady pressure and now we have to boil water. Besides with my tank type water heater it kept the water heated even with the low pressure.
~Molɔ̀ːn Labé Skýla~
“Fear thou not; for I am with thee: be not dismayed; for I am thy God: I will strengthen thee; yea, I will help thee; yea, I will uphold thee with the right hand of my righteousness.”
ISAIAH 41:10
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Joined: Dec 2003
Posts: 86,196
Campfire Oracle
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Campfire Oracle
Joined: Dec 2003
Posts: 86,196 |
Not a chance in hell for me. Look at Texas. "We ain't wasting no money building our houses for for cold weather. Don't bury those pipes deep, it's not cold here" "Oh 9uck, it got cold. Now we are screwed!" With the 9s? Come on, man!
If you take the time it takes, it takes less time.
--Pat Parelli
American by birth; Alaskan by choice.
--ironbender
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Joined: Jan 2003
Posts: 805
Campfire Regular
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Campfire Regular
Joined: Jan 2003
Posts: 805 |
Are these worth the installation cost? Buying our retirement home, and it has a water heater (75 gallon) in the attic.Second floor heated by an AquaTherm system. Don't really like that idea, whole bunch of water that could escape.. Running on propane. Plenty of room in the laundry room, gas and water piping present. Only issue would be the vent, might have to go up through the ceiling into the second floor attic then to the roof. I suppose it could be mounted in the same spot in the attic as well. In AR, so temps are moderate for the most part. Well water, no idea of its temp right now. Going to replace the older HVAC systems (two split units) so don't need the 75 gallon tanked one anymore. Tankless water heaters have a huge burner in them. You need to have a flu study done to see if your furnace will draft with the tankless running. Tankless water heaters don't do well on well water, pun intended. Wrong. They work just fine on well water. Have had my Rinnai LP running on well water for over 14 years....no issues. Have my exhaust/intake combo pipe running through the wall to the outside. And yes, I have hard water, a softener and also use a whole house filter.
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Joined: Nov 2003
Posts: 67,713
Campfire Kahuna
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Campfire Kahuna
Joined: Nov 2003
Posts: 67,713 |
Water tanks in the attic are a bad idea. So are indoor tanks at floor level. Have a tankless gas system mounted outside, very pleased with it. I had a Rinnai tankless heater installed on the outside of the casa 10 years ago. It has been flawless. I have is serviced regularly.
Sam......
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Joined: Sep 2009
Posts: 2,224
Campfire Regular
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Campfire Regular
Joined: Sep 2009
Posts: 2,224 |
They need the maintenance done, flushing to get rid of the calcium and lime deposits. If used for space heating as well look into the combi units.
We install Navien units, and have had good luck with them.
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Joined: Apr 2004
Posts: 4,278
Campfire Tracker
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Campfire Tracker
Joined: Apr 2004
Posts: 4,278 |
Smith,
I had them in my house in Colorado and they worked great. Medium water hardness. Our house burned in the High park fire and when we rebuilt the Plummer wouldn't install them. We gave in and got a gas hot water heater. Works ok but the tankless were instant and better, 10 years w/o any maintenance.
Lefty C
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Joined: Oct 2012
Posts: 7,618
Campfire Outfitter
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Campfire Outfitter
Joined: Oct 2012
Posts: 7,618 |
Two 40 gallon gas, one in each end of the house, always have hot water no matter what happens to power.
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Joined: May 2001
Posts: 18,345
Campfire Ranger
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Campfire Ranger
Joined: May 2001
Posts: 18,345 |
We had several issues with our propane Navien. It was a little less ten years old. Igniter, leaks, senors, heat exchanger leaking. Finally got so bad Navien swapped it out under warranty about a month ago. We'll see how the new one does.
Carpe' Scrotum
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Joined: Feb 2013
Posts: 21,772
Campfire Ranger
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Campfire Ranger
Joined: Feb 2013
Posts: 21,772 |
Many details will determine a yes or no.
Well?
Size of expansion tanks and pressure of pump?
Lots of details for success...
Water heater in attic is not desirable.
If you are not actively engaging EVERY enemy you encounter... you are allowing another to fight for you... and that is cowardice... plain and simple.
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Joined: Nov 2002
Posts: 33,709
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2002
Posts: 33,709 |
Water tanks in the attic are a bad idea. So are indoor tanks at floor level. Have a tankless gas system mounted outside, very pleased with it. I had a Rinnai tankless heater installed on the outside of the casa 10 years ago. It has been flawless. I have is serviced regularly. I have two of those running here Sam without issue though original build.
Conduct is the best proof of character.
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Joined: Jan 2007
Posts: 5,321
Campfire Tracker
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Campfire Tracker
Joined: Jan 2007
Posts: 5,321 |
We had a natural gas powered Rinnai unit installed in our house when it was built 12 years ago. We've been very pleased with it, and I would not want to go back to a conventional tank system.
Ours is mounted on the outside wall of the house, and the only time it has frozen (actually just slushed up a little) was when the temps got down in the low single digits. Leaving a faucet running has always been adequate to keep it from happening again. We too have had a Rinnai for 12 years, mounted on outside wall. No problems at all. You can take a hot shower and run the dishwasher or a load of laundry all day long and never run out of hot water. I wouldn't go back to a conventional tank water heater if it were free. An in the summertime, when we're not running our gas logs, our water heater uses less than $13 of natural gas, because $13;is the minimum charge for gas whether you use any or not.
Last edited by Triggernosis; 02/20/21.
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Joined: Jul 2017
Posts: 419
Campfire Member
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Campfire Member
Joined: Jul 2017
Posts: 419 |
Built a house in 2010 with a rinnai on the outside. Run off propane.
Never ever go back to any other set up if I build again.
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Joined: Feb 2001
Posts: 5,966
Campfire Tracker
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Campfire Tracker
Joined: Feb 2001
Posts: 5,966 |
I have a 50gal gas water heater on both ends of the house. Replaced one last year with another 50gal tank. Thinking of replacing the other before it fails since it is 17 years old. Will a tankless heater work with the gas lines I already have, or do the tankless systems use a larger line? Any issues going from a tank to tankless?
Don't just be a survivor, be a competitor.
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Joined: Feb 2010
Posts: 3,974
Campfire Tracker
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Campfire Tracker
Joined: Feb 2010
Posts: 3,974 |
Research it cause I bought a Noritz about six years back and it's been nothing but a headache...
Coyotes shot no waiting.
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Joined: Aug 2005
Posts: 15,680
Campfire Ranger
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Campfire Ranger
Joined: Aug 2005
Posts: 15,680 |
I'm putting an oil-fired on-demand water heater in my up north house.
![[Linked Image from i.pinimg.com]](https://i.pinimg.com/originals/98/b6/d8/98b6d863a5f722b551cd8e1440bd2bd4.jpg) Z
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Joined: Dec 2013
Posts: 491
Campfire Member
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Campfire Member
Joined: Dec 2013
Posts: 491 |
I have a Rinnai running on propane best idea ever--its outside
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