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re: Anybody switch from electric water tank heater to electric tankless heater?
Posted on 8/11/23 at 9:36 am to Byrdybyrd05
Posted on 8/11/23 at 9:36 am to Byrdybyrd05
Ive got gas fueled electric. Only downside is a random power outage but you can easily plug into a generator to fire it up. Otherwise, fantastic. I replaced 2 50 gallon water heaters with 1 small tankless. Water delay essentially the same.
0
Posted on 8/11/23 at 9:36 am to Byrdybyrd05
There are numerous threads about this on the Home/Garden board, where this thread belongs.
I recommend tankless only if you have reasonably soft (low-calcium) water and can install it in a place that's easily accessible for servicing.
The internals of a tankless water heater are about as complex as a jet aircraft engine.
I recommend tankless only if you have reasonably soft (low-calcium) water and can install it in a place that's easily accessible for servicing.
The internals of a tankless water heater are about as complex as a jet aircraft engine.
Posted on 8/11/23 at 9:39 am to CleverUserName
quote:
A tankless undoubtedly consumes way more power to operate than a tank heater. However the tank heater has to maintain the temp for 24 hours. The tankless is only a fraction of that time.
Exactly.
Posted on 8/11/23 at 9:41 am to BilbeauTBaggins
quote:
I hear that there's "endless hot water" from the tankless but I imagine you have to have a really small household for that to happen.
Not really
The tankless water heaters heats cold water when you open a tap, run the washing machine or turn on a shower. It doesn’t quit to you turn fixtures off.
Posted on 8/11/23 at 9:44 am to Byrdybyrd05
I can’t think of anything more inefficient than an electric tankless water heater
Posted on 8/11/23 at 9:45 am to Byrdybyrd05
quote:
Electric is the only option in our neighborhood. Sounds like I’m going to have to stick with the tank again.
You could get a large propane tank, put it near the house somewhere, and have a plumber run a line to your water heater. A 100 gallon tank running just the water heater will probably last you 4-5 months before you need a refill. I usually get around 9 months, but I have a 250 tank.
Posted on 8/11/23 at 9:47 am to doubleb
I was under the assumption that you could almost run an eternal supply of hot water since you aren't relying on the tank containing that hot water for you. If you are running several hot water lines throughout the house, you will eventually run out of hot water, which defeats the purpose of a tankless.
Also, the entry price for those machines are outrageous. You can buy two tanks that will last 30 years + before you break over the price of what it costs to install a tankless.
Also, the entry price for those machines are outrageous. You can buy two tanks that will last 30 years + before you break over the price of what it costs to install a tankless.
Posted on 8/11/23 at 9:52 am to Byrdybyrd05
quote:
Anybody switch from electric water tank heater to electric tankless heater?
Get a quote from an electrician and double check the power requirements before telling the plumber to go ahead. Your electrician could have more work than the plumber.
Posted on 8/11/23 at 9:53 am to BilbeauTBaggins
quote:
I was under the assumption that you could almost run an eternal supply of hot water since you aren't relying on the tank containing that hot water for you. If you are running several hot water lines throughout the house, you will eventually run out of hot water, which defeats the purpose of a tankless.
Like any product you have to use it correctly.
The tankless heaters never quit making hot water. The quantity of hot water depends on which size you install.
Obviously if you have a large home it’s best to install more than one water heater depending on the size of your home. It’s also important where you locate the heaters. The closer the heater is to the fixtures the better.
And first cost is part of the equation as is maintenance and dependability. Yes There are factors involved besides power consumption.
Posted on 8/11/23 at 9:59 am to Jack Daniel
quote:
I can’t think of anything more inefficient than an electric tankless water heater
How about a 50 gallon electric water heater when you are gone on vacation, or at work and no one is home?
Posted on 8/11/23 at 10:01 am to LSUfanNkaty
quote:
gas heater
quote:
during hurricane season
So we're just going to pretend that the electric controller for these units just don't exist, huh?
Posted on 8/11/23 at 11:20 am to doubleb
quote:
Electric is the only option in our neighborhood. Sounds like I’m going to have to stick with the tank again.
Take a look at the Rheen Electric Hybrid Heat Pump water heaters. There are some rebates available. A condensate drain line would have to be installed for the heat pump.
Rheem
quote:
How about a 50 gallon electric water heater when you are gone on vacation
Turn it off at the breaker box
This post was edited on 8/11/23 at 11:36 am
Posted on 8/11/23 at 12:06 pm to doubleb
Gas tankless with a propane tank
Posted on 8/11/23 at 12:42 pm to Byrdybyrd05
A related question: I have multiple water heaters in my house. All electric house.
One is only slightly used.
Looking for the most efficient use of this.
Just an extra washer and couple of lightly used sinks are part of this water heater.
I just set the water heater on a very low temperature setting
One is only slightly used.
Looking for the most efficient use of this.
Just an extra washer and couple of lightly used sinks are part of this water heater.
I just set the water heater on a very low temperature setting
Posted on 8/11/23 at 1:58 pm to RaginRampage
quote:
So we're just going to pretend that the electric controller for these units just don't exist, huh?
Posted on 8/11/23 at 2:27 pm to fightin tigers
quote:
Electric tankless is a major power consumer. Look into what kind of power you need in place. Lots more than a water tank usually.
Averaged out over time? No, no they probably use less as they are not constantly keeping the water heated.
I've installed electric and gas tanked and tankless and it comes down to individual requirements and limitations of where it's being installed. Electric tankless units have definite advantages, they can be installed in locations where venting isn't an option or would require significant effort, they can be installed as point-of-use, they are generally cheaper/easier to maintain as the heat exchanger is a much more compact and self-contained unit that is replaceable without disassembling the rest of the equipment. They require more electricity in use the same as gas tankless units require more gas while in use, laws of thermodynamics and all.
Posted on 8/12/23 at 2:18 pm to East Coast Band
quote:
A related question: I have multiple water heaters in my house. All electric house.
One is only slightly used.
Looking for the most efficient use of this.
Just an extra washer and couple of lightly used sinks are part of this water heater.
I just set the water heater on a very low temperature setting
I have the same setup in the house I bought. The original owner had an intermatic timer (pool timer) installed near the breaker box for each heater. I've found that I can run the "slightly used" water heater for 4 hours a day on the timer, and will have all the hot water I need for that section of the house on a regular basis (powder room sink, guest bath, utility sink, and clothes washer). It's actually pretty amazing how long a turned off heater will keep water hot.
Posted on 8/12/23 at 9:32 pm to indytiger
I am planning on putting in a gas tankless this week..
I am under the impression the gas version uses electricity for controls also ? And a water meter sensor that cuts off supply in case of leak..
So here is my question .. here in Houston we have had some bad freezes and pipes in attics and garages have frozen.. the gas tank water heater were ok..
Can a hard freeze for a few days with no electricity ( houston is on the texas independent grid and not reliable) damage the tankless water components ( ie pipes feeding.. residual water in system)
Thanks for advice
I am under the impression the gas version uses electricity for controls also ? And a water meter sensor that cuts off supply in case of leak..
So here is my question .. here in Houston we have had some bad freezes and pipes in attics and garages have frozen.. the gas tank water heater were ok..
Can a hard freeze for a few days with no electricity ( houston is on the texas independent grid and not reliable) damage the tankless water components ( ie pipes feeding.. residual water in system)
Thanks for advice
Posted on 8/13/23 at 2:24 pm to Thecoz
Well based on everything I can find and news videos of Houston and Austin tankless heater disasters from the great freeze I have changed my mind..big stories on all the new houses in Austin that had outside tankless ones freeze and rupture.
Navian website says you need to drain it if no power and any damage from a power outage and freeze is not covered.. most have freeze protection but you need power to kick it in..
I went through heck when we had days of freezing weather and no power in the past here in Houston .. my pool equipment has freeze protection also and pumps kick on low to move the water.. but no power … no bueno ..
We had people that lose power and had tank heaters and pipes in attics and garages here in Houston that ruptured when they had no power to keep them warm.. did not drain. Or were out of town..during the last two extended freezes.
Thank god we have politicians and leaders here in texas fixing the grid:(…
Lol … I know the guy in charge of the grid very well .. nice guy .. smart.. rich republican family… and yeah zero experience in power grids.
Navian website says you need to drain it if no power and any damage from a power outage and freeze is not covered.. most have freeze protection but you need power to kick it in..
I went through heck when we had days of freezing weather and no power in the past here in Houston .. my pool equipment has freeze protection also and pumps kick on low to move the water.. but no power … no bueno ..
We had people that lose power and had tank heaters and pipes in attics and garages here in Houston that ruptured when they had no power to keep them warm.. did not drain. Or were out of town..during the last two extended freezes.
Thank god we have politicians and leaders here in texas fixing the grid:(…
Lol … I know the guy in charge of the grid very well .. nice guy .. smart.. rich republican family… and yeah zero experience in power grids.
Posted on 8/13/23 at 3:10 pm to CleverUserName
quote:I've been monitoring my natural gas consumption for several months, and my tank gas water heater seems to be extremely efficient at holding temp. We went out of town for a week and it only fired up to reheat one time. It does have a pilot light which I guess manages to keep it warm.
However the tank heater has to maintain the temp for 24 hours. The tankless is only a fraction of that time.
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