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Old 11-30-2012, 12:58 AM   #16
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Would you invest in Tankless Water Heater?


I have a noritz natural gas tankless water heater. Few years old (new house) it works really good. Never had to do a thing with it. Wife and 2 daughters can be showering, laundry,dishwasher no problems.

I don't remember what cost was. All I know Is plumbers are not cheap. I don't think I would go back to a tank heater after having this though

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Old 11-30-2012, 07:37 AM   #17
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Would you invest in Tankless Water Heater?


Quote:
Originally Posted by oodssoo View Post
md2lgyk,

How has the unit been for you in terms of maintenance and reliability?

(It's easy for people to sway other's away by simply just saying "it's high maintenance"...)

Thank you.
Reliability - 100%. Maintenance - none. There is a water inlet filter I had to clean a few times when we first moved in because of miscellaneous junk inside the piping (house was new construction). Other than that, I haven't had to do anything. Haven't even looked at the unit in a year or so.

Don't know if this has been mentioned, but a tankless is not recommended if you have hard water.
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Old 11-30-2012, 10:00 AM   #18
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Would you invest in Tankless Water Heater?


I have not talked to one person who has installed a good tankless unit that has said they would go back. As for the electric unit I don't know what the maint. issues would be. But like in my home I have 2 40 gallon heaters that means I am keeping 80 gallons of water hot at all times whether I'm using any or not that's really not cheap. One thing though the electric hook-up for tankless is almost as much as the plumber.
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Old 11-30-2012, 10:17 AM   #19
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Would you invest in Tankless Water Heater?


My California home had two water heater issues.

First it was a long 3,500 square foot ranch with only one giant water heater in the garage. The kitchen was close but an awful lot of water had to flow out before hot water reached the showers/tubs on the far end of the house.

The water was terribly hard so tank heaters built up deposits and needed to be replaced often. The salt from a softener did about the same amount of damage. I was diligent about flushing the water heaters but there was just too much of the stuff accumulating.

I had Bosch on demand tankless water heaters installed (you had to have them installed for the warranty). I put a small one for the dishwasher and kitchen sink and a larger one on the other end of the house for the baths. They worked out wonderfully and I had no trouble justifying the cost.
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Old 11-30-2012, 11:17 AM   #20
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Would you invest in Tankless Water Heater?


Quote:
Originally Posted by oodssoo View Post
Each time I stare at my water heater, I just think it is a ticking time bomb...

So, is there any option out there that eliminates this concern?
Yes. Purchase a traditional tank heater and put a magnesium anode in it (teflon tape the threads). Then, every few years, inspect the rod and replace it when necessary. Anode rods are cheap compared to new water heaters or flood damage.

Oh, and flush the tank at least annually too.

Quote:
Originally Posted by Fix'n it View Post
they are not paying to heat water that is not being used for a while.
That's technically true, but... my traditional tank heater costs me $10 a month in gas -- $10 to wash clothes, wash dishes, and take showers. The "wastage" on my water heater is probably costing me what, $1 per month?

And that's not even a high-efficiency condensing heater. Just a classic natural draft standing-pilot millivolt that doesn't even plug in to electricity.

Personally, I don't believe tankless saves an appreciable or significant amount of money compared to a traditional tank. At least, not with the nat. gas prices I have.

And what happens when the tankless breaks? You can't exactly go to your local home center and buy a $10 thermocouple right off the shelf.

Quote:
Originally Posted by sdsester View Post
First it was a long 3,500 square foot ranch

an awful lot of water had to flow out before hot water reached the showers/tubs on the far end of the house.
Recirculating hot water pump. Done.

Quote:
The water was terribly hard so tank heaters built up deposits and needed to be replaced often. The salt from a softener did about the same amount of damage.
As noted above, you gotta keep up on anode inspection and replacement.

So here's a question for tankless owners -- to tankless heaters have an anode?
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Old 11-30-2012, 03:37 PM   #21
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Would you invest in Tankless Water Heater?


I just did a Rinnai during renovations of the new/old house we moved into a month ago. Awesome. I got a previous model, high efficiency gas for $900 and it cost around $300 total to install, so $1200 out of pocket. My other option was a horizontally vented tank which would have been less than $900, but higher than a traditionally vented one, though install costs would have been under $50.

With 3 kids aged 7-11, we're going to be using a lot of hot water in a few years when they're all teens, so I think it will pay for the extra cost easily.

We did gain some floorspace in the basement, but it's just a storage basement, not a livable one, so that wasn't much of a concern.

Most people don't install a tankless heater by themselves, so that cost is normally much higher than what mine was because it involves water lines, gas line (most houses require an upsize, mine was already 1"), vent, and electrical service where a typical tank replacement is a gas flex and 2 flex water lines, maybe vent if the height is much different.
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Old 11-30-2012, 06:04 PM   #22
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Would you invest in Tankless Water Heater?


I changed out my tank water heater myself to a tankless one about two years ago. First, the cost wasn`t that much more than a good tank version. (I bought it at Home Depot.) The prices on these units have dropped considerably. We have saved an average of $20 a month on utilities alone. We have had no maintenance issues. As far as safety is concerned, as a retired Firefighter, I can say I have seen the results of a residential hot water tank explosion a few times, and I`ll take my chances with a tankless unit. Just my thoughts.
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Old 11-30-2012, 06:40 PM   #23
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Would you invest in Tankless Water Heater?


I build our house about five years ago, 1700 sq. ft. I also installed infloor heating under the basement slab (basement only). The hot water is all supplied from one oversized gas water tank. I did a lot of research before making up my mind and this was the best overall solution. One tank, one bill. Much less cost than a tankless system. If an issue with the tank, simply replace it. Replacing parts or the heat unit can of a tankless can be very costly and BE SURE the manufacturer is still in business.
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Old 11-30-2012, 07:20 PM   #24
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Would you invest in Tankless Water Heater?


I bought my mother I Navien tankless about 5-6 years ago. I am a big fan of energy efficiency, and this was a condensing unit that was very high efficiency. Unfortunately, it was not a good machine. One thing to remember is that a tankless water heater is a far more complex system than a tank type (well, maybe some tank types are complex, but most are not). More service calls on that unit than all the other tank type water heaters I have owned in my lifetime, combined. (Eventually had it replaced on a partial warranty -- new unit has been good, knock on wood). The first time you need a service call, it may very well cost you more than all the energy it will save in it's lifetime
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Old 12-01-2012, 01:24 AM   #25
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Would you invest in Tankless Water Heater?


All very good feed back and helpful. It is what I consider as a "myth" purchase when it comes to water heaters unfortunately...

I have not read anything good about Naviens, while Renai remains having little to no consistency in its ratings either...

(to be continued)
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Old 12-02-2012, 12:08 PM   #26
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Would you invest in Tankless Water Heater?


What is your heating system? I ask because if you have a boiler, you could add an indirect water heater to it. I did that and with the size of my boiler and the temp of the incoming water, I can get just shy of 3.4 GPM forever. Stand by losses are very minimal for the tank.

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