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Tankless Hot water heater - gas or electric?
Posted on 11/9/18 at 7:39 am
Posted on 11/9/18 at 7:39 am
I’m renovating a house and will be putting a a Rinnai tankless hot water heater in the attic. I have natural gas at the house, but I’m not seeing advantages of the gas hot water heater. Does anyone have experience with these?
10
Posted on 11/9/18 at 7:48 am to will1883
I have neither, but have done a fair amount of research into them. From what I gather, the electric versions use a lot of electricity, thereby costing more in terms of higher energy bills. I don't know of any drawbacks to the natural gas versions.
Posted on 11/9/18 at 7:50 am to will1883
We have Rinnai electric tankless and LOVE it. We also have a gas back up that is not on but sitting on sic em if needed. leave it valved out and dry until needed they are cheap and worth it for insurance.
Posted on 11/9/18 at 7:58 am to will1883
Electric tankless water heaters are woefully inefficient. Using electricity to convert to heat will COST. The gas ones are much more efficient and should cost much less to run.
Posted on 11/9/18 at 8:15 am to will1883
IIRC, the electric ones take A LOT of power to run, and can't provide near enough heat for a decent sized house to flow properly. That's why there aren't many options.
Do a gas one
Do a gas one
Posted on 11/9/18 at 8:20 am to will1883
Gas, electric uses a lot of electricity. I built a house that had two gas tankless water heaters.
Posted on 11/9/18 at 8:24 am to WPBTiger
I have 2 gas ones as well. Last house had one. I’ll never go back to a regular tanked version.
Posted on 11/9/18 at 8:37 am to NOLAGT
We have gas, it's great. You can spend your whole hangover in a hot shower if you want.
Posted on 11/9/18 at 8:39 am to way_south
Inb4 why you heating hot water?
Posted on 11/9/18 at 8:41 am to Politiceaux
All i can speak on is what i have. Electric.. and i will never go back to a tank one. Hot water on demand and it stays hot as long ad you want it to
Posted on 11/9/18 at 8:57 am to oleyeller
I have an electric because of that being my only option, and I love it. I would have used gas it woulda been available. Will never go back to a tank.
Posted on 11/9/18 at 9:19 am to will1883
If you have nat gas it will be cheaper to run simply because per energy unit nat gas is cheaper. Also if your demand is high, a lot of electrics won't keep up or you will need a very large electric to be able to keep up. And even small electrics need a ton of power on demand. I have one of the smallest available and it requires a 60amp breaker.
Posted on 11/9/18 at 9:19 am to mach316
How easy is it to convert to a tankless assuming I currently have an ancient gas tank one? Something I could do on a Saturday morning given that I have the right tools? I've just noticed a little drop off in the water when filling the tub. Used to be really hot until the tub was full. Now I cut it off about 2/3 full, wait a few minutes, then finish filling it.
Posted on 11/9/18 at 9:24 am to mach316
Also these comments on electric costing a lot and expensive to run is an absolute falsehood. I'm certain our bill is cheaper with on demand electric. We have a 3700sqft home. 3.5 bath and we still haven't busted a $250 electric bill in years!!
Posted on 11/9/18 at 9:44 am to TU Rob
quote:
How easy is it to convert to a tankless assuming I currently have an ancient gas tank one? Something I could do on a Saturday morning given that I have the right tools? I've just noticed a little drop off in the water when filling the tub. Used to be really hot until the tub was full. Now I cut it off about 2/3 full, wait a few minutes, then finish filling it.
ETA: disregard the below that's for electric my bad.
You can replace the heating elements for like $17 each, there are usually two of them. Its a 10 minute job at most, just unplug them and unscrew them then replace. You have to empty the tank first but that's easy enough to do. That's your cheapest option.
This post was edited on 11/9/18 at 9:47 am
Posted on 11/9/18 at 10:00 am to Boat Motor Bandit
Can't really make a comparison to anyone else. You'd have to install a gas one, and see where your bill went.
I have a 1200sqft house with a gas tanked, and my electric bill approaches $300 during the summer
I have a 1200sqft house with a gas tanked, and my electric bill approaches $300 during the summer
Posted on 11/9/18 at 10:02 am to will1883
I sell them, and I would tell you do not go electric. In order to have one large enough to supply a whole house, you'd need to build a power plant next to your house. Rinnai and Navien are your best options.
Posted on 11/9/18 at 10:15 am to will1883
For anything more than a 1 bath house or POU setup, gas definitely. I did an install of an electric unit in a small house I'm working on, 1-bath where the kitchen and laundry room hot water plumbing are all in very close proximity and run with insulated PEX, and it has no trouble supplying very hot water. The power consumption is an issue, even that small unit required basically the same connection as putting in two seperate ovens, but the advantage in flexibility of installation is very nice.
Posted on 11/9/18 at 10:20 am to will1883
Gas Rinnai. I will never get a tank one again
Posted on 11/9/18 at 10:53 am to Clames
How much gas do they pull? I have a 3/4" main to the house and split off that 1/2" stainless tubing to my water heater. Id like to swap it for a gas on demand heater, but i wont do it if i need bigger gas lines.
By the eyeball test i cant see it needing bigger stuff but ive never done the numbers and dont care to.
By the eyeball test i cant see it needing bigger stuff but ive never done the numbers and dont care to.
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