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re: Tankless hot water heaters?

Posted on 1/6/14 at 10:37 pm to
Posted by Tigerholic
Member since Sep 2006
2214 posts
Posted on 1/6/14 at 10:37 pm to
Whatever you get mAke sure it is a condensing unit which is over 90% efficient.
Posted by Dizz
Member since May 2008
14722 posts
Posted on 1/6/14 at 10:44 pm to
I have one and my pressure sucks.
Posted by Future_FlexZone
Baton Rouge
Member since Sep 2013
284 posts
Posted on 1/6/14 at 11:18 pm to
to the OP: Love mine
Posted by Putty
Member since Oct 2003
25485 posts
Posted on 1/6/14 at 11:27 pm to
I have one. 99.9% of the time it works beautifully. Then every now and then (5-10 times a year) you have to turn the water on and off a few times to trigger it. Still, worth never running out of hot water.
Posted by CroakaBait
Gulf Coast of the Land Mass
Member since Nov 2013
3973 posts
Posted on 1/7/14 at 12:16 am to
Went from a LP tank to Rheem tankless electric, power bill jumped up $20 per month higher than normal, but it was easy as hell to install, was lucky and had space for another breaker on the service panel. The more powerful electric units suck a lot of juice, you just have to make sure to power it correctly.
Posted by CroakaBait
Gulf Coast of the Land Mass
Member since Nov 2013
3973 posts
Posted on 1/7/14 at 12:21 am to
FWIW, I would've gone with the gas tankless if I had natural gas service out here in the sticks, electric tankless was just easier in my case than rigging up a LP tankless.
Posted by Mariner
Mandeville, LA
Member since Jul 2009
1935 posts
Posted on 1/7/14 at 4:35 am to
I have a Rinnai 9.4 GPM. I like it, but I only recommend it if you are looking for endless hot water. Newbuilds are different, but the cost of the unit + labor + requirement for stainless exhaust tubing is a huge price difference when replacing a tank in an older house. It cost me twice as much as a tank. It all depends where the tank is located. It saves money per month but I don't see it paying for itself over its lifetime.

I like the fact of maintaining an accurate temperature. It holds a constant and accurate temp. Its quiet and sounds like a muffled jet engine.

I got a seven year warranty parts and labor. From what I am told, you only have to replace parts to the unit instead of the whole unit, so it can last 20 years.

If you have hard water it needs to be flushed every year.

Get it only if you desire endless hot water. If you have a big house I recommend installing one near the kitchen area and another near the master bedroom. When you turn on the hot water it has to push all the cold water out of the line from the unit + the time it takes to heat the new water. In essence it takes me about 20-30 seconds more to get hot water than from a tank.

I will never run out of hot water. It's worth it to me.

Posted by skinny domino
sebr
Member since Feb 2007
14330 posts
Posted on 1/7/14 at 6:43 am to
quote:

If you want hot water for days yes. If you are looking to save money on your gas bill. No
Posted by NOLAGT
Over there
Member since Dec 2012
13509 posts
Posted on 1/7/14 at 6:59 am to
You would save money on your electric bill by not heating 80gal of water 24/7 365 for when you might want to use it.

I think they stopped it this year or last year maybe but check and see if they still offer the tax credit. I got a 500$ tax credit...not a wright off...but 500$ added back to my return.
Posted by Cooter Davenport
Austin, TX
Member since Apr 2012
9006 posts
Posted on 1/7/14 at 7:02 am to
We have one and hate it. It's fine in the summer, but in the winter it cycles from hot to cold hot to cold every minute or so. Extremely annoying and uncomfortable.
Posted by Sl4m
Baton Rouge
Member since Apr 2012
3717 posts
Posted on 1/7/14 at 7:43 am to
If it fluctuates in temps there is something wrong with it.

Posted by JPLIII
Broussard - terd supporter
Member since Jan 2008
22630 posts
Posted on 1/7/14 at 7:46 am to
We have them in our house and they work great. Will not go back to a conventional water heater.
Posted by Sl4m
Baton Rouge
Member since Apr 2012
3717 posts
Posted on 1/7/14 at 7:53 am to
I'm not going to comment on the subject anymore.

However I will advise that if you get one installed choose a brand that is leader in reliability (not sales) and has local certified technicians that can service it when it needs maintenance.

Rheem had mother board problems for years, but have since fixed it. Techs plentiful in the BR area.

Paloma has an incredible product, on par with Nolritz quality, but it's more commercial oriented.

Noritz is quality hardware with commercial and consumer focused heaters. BR has lots of certified techs in BR.

No comment on any other line other than to say that if you have to go tankless with an electric Ranaii is the brand of choice but there aren't any certified techs in the BR area yet that I know of.

These heaters require special training to work on so picking a non top brand name heater Will leave you with an expensive fee to pay to get a technician from out of town to service it.

This post was edited on 1/7/14 at 7:55 am
Posted by Kajungee
South ,Section 6 Row N
Member since Mar 2004
17033 posts
Posted on 1/7/14 at 8:01 am to
quote:

You would save money on your electric bill by not heating 80gal of water 24/7 365 for when you might want to use it.


Natural Gas is cheap and expected to stay that way for a while. My Gas bill is avg $38 a month for HVAC, Hot water and cooktop.
If I save 20% on gas per month how long would it take to pay off the extra $600-$800 the tankless water heater cost installed.
Posted by tigerwag69
Laplace, LA
Member since Dec 2013
22 posts
Posted on 1/7/14 at 8:04 am to
One correction. The plumber doesn't have to install an orifice at the meter. He needs to make sure the pipe running to the heater is large enough to handle the volume of gas needed for it to operate properly. That may be the problem in your house. Your pipes aren't large enough for you to run your heating system, water heater, and any other appliances you have at the same time. That would be why you don't notice it during the summer.
Posted by CajunAlum Tiger Fan
The Great State of Louisiana
Member since Jan 2008
7871 posts
Posted on 1/7/14 at 8:12 am to
I have a Paloma gas unit that's been great for 5+ years. I don't have any pressure issues even with multiple simultaneous uses. My gas usage is actually down, so it is saving money.
Posted by SmackoverHawg
Member since Oct 2011
27328 posts
Posted on 1/7/14 at 8:13 am to
quote:

Do the really want to see my 8 year old and 15 year old daughter.

Don't ask that on here.
Posted by lsu777
Lake Charles
Member since Jan 2004
31002 posts
Posted on 1/7/14 at 8:14 am to
then something is wrong with yours.
Posted by Tigerstark
Parts unknown
Member since Aug 2011
5976 posts
Posted on 1/7/14 at 8:14 am to
quote:

One correction. The plumber doesn't have to install an orifice at the meter. He needs to make sure the pipe running to the heater is large enough to handle the volume of gas needed for it to operate properly. That may be the problem in your house. Your pipes aren't large enough for you to run your heating system, water heater, and any other appliances you have at the same time. That would be why you don't notice it during the summer.


Thats why I don't have one currently. I rented a house that had one and it was oustanding. Bought our current house and was looking to add it.

Would have to either install a 1 inch gas supply line across the width my house from the gas supply to the water heater (and possibly redo the intake/meter area as well) or change how the piping works in my house (attic area). Either way, a sizeable investment (once you add in the heater) that just wasn't worth it at the time.

I'll be redoing one of the bathrooms in the next 3 or so years, and may look at it then.
Posted by Sl4m
Baton Rouge
Member since Apr 2012
3717 posts
Posted on 1/7/14 at 8:15 am to
Correct, his regulator is going to be good for 800,000 - 1,000,000 btu.

A 3/4 gas line is needed otherwise if the heater reaches full demand and doesn't have sufficient gas supply the heater will throw an error code.

The output temp is regulated on the motherboard chip that regulates temps and flow. If output temps arent constant then the heater needs service.
This post was edited on 1/7/14 at 9:13 am
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