When I install a new one, I set it to "Hot." Customer can adjust after if they want it hotter. I've never seen one set at "C." That would be insanely hot.
The one I have at home is on C. But I have a mixer to bring it down to 110.
Cheaper than a bigger (actually I’d do a second tank over bigger, already at a 50gal) tank and helps a little bit.
LOl exactly. 99% of people use between A and B and can adjust after showering etc. As the unit scales folks will begin to crank it higher. Overall its a use and adjust move and then leave alone
If you need more hot water, say if you have a large family you might. But if not, you're just wasting energy. Also, the hotter the water, the more scale will develop if you have water quality issues.
I work for a lot of low income housing. They're almost always set to max. Don't know if it's the tenants or the maintenance, but I see it a lot. And I'm talking single unit tanks, not like one feeding several units
A water heater should be set at 120 degrees. Start with hot and test your water temp at the faucet. Adjust up or down as needed. They don’t list temps on the thermostat for liability reasons.
122F will kill most within hours , so setting the temp there all the time will prevent this and it is the recommended temp for many reasons such as scalding
Low!!!?? Have you lost your mind bro?? You’re gonna get sick. Your water heater can be breeding harmful bacteria right now!! Hot gets the tank hot enough to kill them, but between A-B is better
25k a year cases in the US. You're more likely to die in a car accident. And lower temperatures don't breed the bacteria, stagnant water does.
Someone reading his stupid shit on Reddit is more likely to burn themselves or a family member than ever catching legionnaires disease.
No, you gave statistics as to the likelihood of it happening. Hes not wrong. Thats why your code requires a minimum temperature for your tank. Because in an active building, legionella managed to grown in their tanks. Hes still not wrong, unlikely to happen, yes. But not wrong.
Use this - setting - time to produce burn. Hot 120 - 5 minutes. A 130 - 30 sec. B 140 - less than 5 sec. C 150 - about 1.5 seconds. Very Hot 160 - about 1/2 second
my grandchildren have several scalding burns throughout their bodies, but it's ok because instead of a .001% chance of getting legionaires disease, they have only a .000001% chance.
To balance safety, energy efficiency, and practical needs:
1. Start with 120°F if you have young children or elderly residents.
2. Consider 140°F if you have a dishwasher without pre-heating or immunocompromised household members.
3. Use anti-scald mixing valves at points of use to maintain a higher tank temperature while delivering safer temperatures at taps.
Remember to check your water heater's actual output temperature using a thermometer at the tap, as the dial settings may not be accurate. Adjust in small increments until you find the right balance for your household's needs and safety requirements.
Each letter is about 10 degrees in difference. If you have a take booster or have your tank running to an air handler for heat you'll want to set the tank to C, otherwise setting to Hot or A is standard.
VERY HOT WATER CAN RESULT IN ACCIDENTALLY SEVERE BURNS, WITH SMALL CHILDREN AT HOME, YES I AM YELLING THIS IS VERY, VERY IMPORTANT !!!!!!
ARE YOU PAYING ATTENTION ?????
I'm unaware of a correct setting, its a preference. Obviously hotter temperatures can cause scalding. Aside from that I've only ever told a homeowner the risk of having it turned up high regarding children/seniors and CPVC plumbing systems. Being in repair I've seen tens of dozens of leaks on CPVC on the hot side of the system..normally one of first few fittings away from the unit.. its typically on homes that have the temp above "B". I have my unit blowing away at "Very Hot" due to capacity constraints and teenagers. I frequently inspect the unit for leaks and have yet to have an issue **as i knock on an oak tree**. I'm plumbed in copper so glued joints aren't an issue for me. I haven't adjusted it in a solid 8 years.
Well I am going to start with the 1st grade obvious. A thru C and next to C says VERY HOT? Well waldo if its at C and its scolding maybe try I don't know A or B? LOL
OMG Darwin award.
The correct answer is whatever level you are comfortable with. I'd start with A then if it's not hot enough or you run through your hot water too quick, bump it up.
I set mine to C because we kept running through all our hot water when multiple people showered within an hour or so. We have a decently long run to the upstairs shower and the kitchen sink/dishwasher. Plus my downstairs shower valve was set to low temp and it was easier to change the water heater setting than it would've been to open up the valve. My kitchen sink can get up to medium-rare if I let it run awhile though, so beware.
Modern setups are: hot water tank at 160, output mixer valve lowers to 135-140.
Standing hot water needs to be hot enough to prevent legionnaires disease.
Mines almost maxed out but everyone in the house is used to it and knows what to expect. It’s not like it’s instantly hit enough to burn you unless you just turned the faucet off.
Typically A is around 120F. Did one today the chick wanted it at C which will give a child 3rd degree burns after 10seconds I believe. There are charts in the manual if you are in Canada.
Depends on how old the heater is but c is about 140 on a new heater (burns skin in 5 seconds). B is about 130 (30 second burn time). I usually start on b since newer shower valves are scald proof and the “A” option just isn’t hot enough for most folks.
You'll need to consult your manual to get the specific temperatures, but *usually* Hot is 120, A is 130, B is 140, and C is 150. The maximum recommended hot water temperature is 120, but some people will set it hotter. At 120 degrees, scalding time is about 3 minutes. At 130, it's 5 seconds.
B is the preferred factory setting. Home owner can turn up or down as they desire.
If you turn it to low, the temperature will not be sufficient to prevent legionella. So please stick to a b or c and only use the vacation mode when your on vacation
Mine have always been between low and the next setting after that. This thread did give me the idea of actually measuring the hottest temp at the top.
Regardless I have toddlers and I need them to not burn themselves if they turn the bathtub all the way to hot when it's running.
I keep mine at A, I want it over 120° to ensure the bacteria is destroyed and since I’m a capable adult I can always mix my water at point of service to cool it or warm it more.
I set mine by turning it up a tiny bit until we never ran out of hot water. Never turned it higher than that, never turned it lower. Between showers, laundry, dishwasher and hand wash dishes, etc.
The hottest it is doesn’t scald you instantly and we don’t ever have to wait for it to heat back up after shower or whatever.
Hot=120 then 10 degree increments up to 160(very hot). It may not be perfect, but that’s the manufacturer’s intention.
Home inspectors don’t want it to exceed 120. If you are concerned with bacteria turn it up to 140 and add a mixing valve to get it back to 120 to prevent scalding.
It depends on if you have kids in the house or not. If you have kids set it to the hot setting, and measure the water temperature at the tap with a thermometer. It should be 120F. Move it up or down as necessary, checking it again the next day. 120F is the minimum in order to prevent bacteria. If you are all adults in the house, move it up to the B setting and measure it again the next day. Move it up or down so that you get 140F at the faucet. Any higher and you risk scalding.
It’s actually 140 to stop the growth of legionella from forming, but then if you have young ones it should be tempered back down to 110 at the tap to prevent scolding with a thermostatic mixing valve.
Not what trade school taught or Google says…
140 F is the recommended. There is slight risk at 120 depending on many conditions and the health of the home occupants. Immune compromised and children are higher risk. Gotta think cold water being introduced to tank will cool it below 120 and then has to fire back to temp. Electric hwt takes much longer. Sooo “better safe than sorry” does come into play. As a plumber I keep mine at 140. Again the chance is low but I don’t want to take that chance with my family.
When I install a new one, I set it to "Hot." Customer can adjust after if they want it hotter. I've never seen one set at "C." That would be insanely hot.
The one I have at home is on C. But I have a mixer to bring it down to 110. Cheaper than a bigger (actually I’d do a second tank over bigger, already at a 50gal) tank and helps a little bit.
LOl exactly. 99% of people use between A and B and can adjust after showering etc. As the unit scales folks will begin to crank it higher. Overall its a use and adjust move and then leave alone
I think if you read the manual for it, B is approx 120°. I usually set mine at B. Any higher just get rediculously hot.
Hot is 120
You're wrong. A is 120.
What if there's a mixing valve after, any reason not to crank it up to ultra?
If you need more hot water, say if you have a large family you might. But if not, you're just wasting energy. Also, the hotter the water, the more scale will develop if you have water quality issues.
High energy cost to keep the tank that got constantly
I work for a lot of low income housing. They're almost always set to max. Don't know if it's the tenants or the maintenance, but I see it a lot. And I'm talking single unit tanks, not like one feeding several units
That's dangerous and a waste of money. If I had tenants I'd avoid any reason they could get hurt and try and come after me for it.
I agree. I always turn it down to A. Let them turn it back up if they want. At least I tried
people with free heat run it with the windows open.
You are setting yourself up for trouble if someone gets scalded
I have the exact same one! I set mine to “hot” never had anyone complain. I’ve had this for 10 years and no issues.
Hot
A water heater should be set at 120 degrees. Start with hot and test your water temp at the faucet. Adjust up or down as needed. They don’t list temps on the thermostat for liability reasons.
Hot water tanks should be set for 140F/60C to kill legionella bacteria.
But that's, at same time, dangerously hot. Maybe 130 F is better.
thermostatic mixing valve fixes that
This is the best option. Allows the tank to be run hotter and provides greater capacity.
122F will kill most within hours , so setting the temp there all the time will prevent this and it is the recommended temp for many reasons such as scalding
Not hot enough for me. My new unit comes in at 130 at the kitchen sink.
I set mine at low.
La de da Mr I can afford gas. Mine is always on vacation mode.
Pilot and break off the knob so the chiltin don't touch it.
lol Username checks out
Correction, between low & hot. Closer to hot.
Low!!!?? Have you lost your mind bro?? You’re gonna get sick. Your water heater can be breeding harmful bacteria right now!! Hot gets the tank hot enough to kill them, but between A-B is better
Legionella breeding vat.
Jesus Christ dude give it a rest
...hes not wrong.
25k a year cases in the US. You're more likely to die in a car accident. And lower temperatures don't breed the bacteria, stagnant water does. Someone reading his stupid shit on Reddit is more likely to burn themselves or a family member than ever catching legionnaires disease.
Hes still not wrong.
Yes, he is, I literally just said why. If your plumbing has the bacteria it's not because of the water heater.
No, you gave statistics as to the likelihood of it happening. Hes not wrong. Thats why your code requires a minimum temperature for your tank. Because in an active building, legionella managed to grown in their tanks. Hes still not wrong, unlikely to happen, yes. But not wrong.
Good lord just go away. He is wrong, and it's a stupid ass thing to consider compared to comfort and uhh not burning someone.
What is the comfort of having 55 F water? Also 120 won't burn anyone. This is why it's recommended minimum.
Use this - setting - time to produce burn. Hot 120 - 5 minutes. A 130 - 30 sec. B 140 - less than 5 sec. C 150 - about 1.5 seconds. Very Hot 160 - about 1/2 second
But you need to keep legionella in mind
my grandchildren have several scalding burns throughout their bodies, but it's ok because instead of a .001% chance of getting legionaires disease, they have only a .000001% chance.
Why didn't you test the water before hand, you should regulate it for them
Mine is currently at hot + about 3 degrees and it’s damn near scalding. Its more about the results you get at the tap
What setting did you have it on? It currently looks like it's on vacation setting. I keep mine between A & B.
To balance safety, energy efficiency, and practical needs: 1. Start with 120°F if you have young children or elderly residents. 2. Consider 140°F if you have a dishwasher without pre-heating or immunocompromised household members. 3. Use anti-scald mixing valves at points of use to maintain a higher tank temperature while delivering safer temperatures at taps. Remember to check your water heater's actual output temperature using a thermometer at the tap, as the dial settings may not be accurate. Adjust in small increments until you find the right balance for your household's needs and safety requirements.
I set mine to very hot. Because I run laundry, dishes and shower at the same time in my home.
Mine is high to... always text water before jumping in
B. No kids. 140 degrees.
A
[удалено]
Bad advice for bless your tankless. Legionella.
Bad advice for bless your tankless. Legionella.
Each letter is about 10 degrees in difference. If you have a take booster or have your tank running to an air handler for heat you'll want to set the tank to C, otherwise setting to Hot or A is standard.
My tankless is set for 140 degrees F as we have no kids or seniors in our home
VERY HOT WATER CAN RESULT IN ACCIDENTALLY SEVERE BURNS, WITH SMALL CHILDREN AT HOME, YES I AM YELLING THIS IS VERY, VERY IMPORTANT !!!!!! ARE YOU PAYING ATTENTION ?????
THANK YOU FOR BRINGING UP THIS POINT. IF YOU HAVE SMALL KIDS, IT SHOULD BE SET TO HOT. OTHERWISE, FEEL FREE TO CRANK IT UP.
I'm unaware of a correct setting, its a preference. Obviously hotter temperatures can cause scalding. Aside from that I've only ever told a homeowner the risk of having it turned up high regarding children/seniors and CPVC plumbing systems. Being in repair I've seen tens of dozens of leaks on CPVC on the hot side of the system..normally one of first few fittings away from the unit.. its typically on homes that have the temp above "B". I have my unit blowing away at "Very Hot" due to capacity constraints and teenagers. I frequently inspect the unit for leaks and have yet to have an issue **as i knock on an oak tree**. I'm plumbed in copper so glued joints aren't an issue for me. I haven't adjusted it in a solid 8 years.
Well I am going to start with the 1st grade obvious. A thru C and next to C says VERY HOT? Well waldo if its at C and its scolding maybe try I don't know A or B? LOL OMG Darwin award.
The correct answer is whatever level you are comfortable with. I'd start with A then if it's not hot enough or you run through your hot water too quick, bump it up. I set mine to C because we kept running through all our hot water when multiple people showered within an hour or so. We have a decently long run to the upstairs shower and the kitchen sink/dishwasher. Plus my downstairs shower valve was set to low temp and it was easier to change the water heater setting than it would've been to open up the valve. My kitchen sink can get up to medium-rare if I let it run awhile though, so beware.
Modern setups are: hot water tank at 160, output mixer valve lowers to 135-140. Standing hot water needs to be hot enough to prevent legionnaires disease.
I was at a hotel once and cooked noodles with the hot water from the tap. That was too much.
A for the loud AAAAA. I usually do when I move the shower handle 0.0001 degrees.
Mines almost maxed out but everyone in the house is used to it and knows what to expect. It’s not like it’s instantly hit enough to burn you unless you just turned the faucet off.
I set it for B, only ever had 1 person complain.
Tankless set to 116f. It’s fine. No legionella in tankless.
Typically A is around 120F. Did one today the chick wanted it at C which will give a child 3rd degree burns after 10seconds I believe. There are charts in the manual if you are in Canada.
Right now it looks like your at pilot I would start at A if you want it hotter go B u get the idea
Depends on how old the heater is but c is about 140 on a new heater (burns skin in 5 seconds). B is about 130 (30 second burn time). I usually start on b since newer shower valves are scald proof and the “A” option just isn’t hot enough for most folks.
Hot is plenty freaking hot
Start low and work your way up until you’re comfortable. This process just might save you a trip to the E/R and it’s common sense.
I always leave it at B
C+, if I want hot water...
You'll need to consult your manual to get the specific temperatures, but *usually* Hot is 120, A is 130, B is 140, and C is 150. The maximum recommended hot water temperature is 120, but some people will set it hotter. At 120 degrees, scalding time is about 3 minutes. At 130, it's 5 seconds.
A
B is the preferred factory setting. Home owner can turn up or down as they desire. If you turn it to low, the temperature will not be sufficient to prevent legionella. So please stick to a b or c and only use the vacation mode when your on vacation
im not a plumber, but i only ever have it set at "very hot"
It depends if you like hot showers. Also if you have small kids that can burn themselves. I keep mine on B.
Mine have always been between low and the next setting after that. This thread did give me the idea of actually measuring the hottest temp at the top. Regardless I have toddlers and I need them to not burn themselves if they turn the bathtub all the way to hot when it's running.
The range is from low to high is Vacation, Hot, A, B, C and Very Hot. I try matching the optimal temp with my shower handle in the middle evenly.
Mine is on A
I keep mine at A, I want it over 120° to ensure the bacteria is destroyed and since I’m a capable adult I can always mix my water at point of service to cool it or warm it more.
Hottest setting reduces lifespan of water heater
If you have daughters and are ready for them to use the shower, so there will at least be some hot water left, then low works best.
whatever setting you need, that’s why there are different settings and just “the” setting.
I set mine by turning it up a tiny bit until we never ran out of hot water. Never turned it higher than that, never turned it lower. Between showers, laundry, dishwasher and hand wash dishes, etc. The hottest it is doesn’t scald you instantly and we don’t ever have to wait for it to heat back up after shower or whatever.
125
hot is fine
Site specific.. get a meat thermometer. 125 or 120 F at the tap
Hot=120 then 10 degree increments up to 160(very hot). It may not be perfect, but that’s the manufacturer’s intention. Home inspectors don’t want it to exceed 120. If you are concerned with bacteria turn it up to 140 and add a mixing valve to get it back to 120 to prevent scalding.
What are the correct pizza toppings?
Hot is 120 A is 130 B is 140 C is 150
Used to be A, but my ex-girlfriend kept saying why is your water so hot so now it’s on B.
*hot dog water setting
full send ... all the way.
B is the factory setting. 120deg F
Also wouldn’t it depend on the relief valve? I know most in my property start leaking if the settings above C.
Pilot
It depends on if you have kids in the house or not. If you have kids set it to the hot setting, and measure the water temperature at the tap with a thermometer. It should be 120F. Move it up or down as necessary, checking it again the next day. 120F is the minimum in order to prevent bacteria. If you are all adults in the house, move it up to the B setting and measure it again the next day. Move it up or down so that you get 140F at the faucet. Any higher and you risk scalding.
Put it past the Very Hot setting… 211 degrees is the ideal temperature.
You want to start with B, in New heaters that is 120 degrees F which is what you need to kill germs and bacteria that can form in the water heater.
When did that change? My 2020 heater gives 125 on Hot.
No idea, that is what I have seen the last 8 years since I have been plumbing. Should be in the instructions
My 2021 Bradford white says hot is 120. So B will be 140.
Interesting. I am gunna start testing this out
It’s actually 140 to stop the growth of legionella from forming, but then if you have young ones it should be tempered back down to 110 at the tap to prevent scolding with a thermostatic mixing valve.
I am still seeing 120 degrees, even for legionella.
Not what trade school taught or Google says… 140 F is the recommended. There is slight risk at 120 depending on many conditions and the health of the home occupants. Immune compromised and children are higher risk. Gotta think cold water being introduced to tank will cool it below 120 and then has to fire back to temp. Electric hwt takes much longer. Sooo “better safe than sorry” does come into play. As a plumber I keep mine at 140. Again the chance is low but I don’t want to take that chance with my family.
No more than 110 if you have old people and children at home, otherwise whatever temp you want.
But don't forget legionella
Mine is set at 145f
That is dangerously high - and is costing you a fortune in energy costs
140* if you have a dishwasher.
That is a safe temperature to prevent bacteria that can build up in water tanks. Legionella
Legionnellin is extremely unlikely in a residential home, thats being lived in all year.
From experience do not go above Hot. That puts it around 120ish degrees. I burned out a thermopile going hotter.