Should I install two tankless water heaters in series?
Reverse return or parallel. Depends on which is easier. Just install one tankless, it will work. When running im parallel if your piping isn,t the same length will one heater not work more than the other. I realize in series the first tank is gonna run more.
Is it possible to have two heaters in a house?
Of course it does depend on the application and why you are useing two heaters and not one. You are not SOL when it comes to removing 1 heater out of a series system if they are plumbed correctly. I install all series heaters with a bypass. The bigger houses I've done are usually 2 50 gallon power vent heaters.
Should I Run my water heater in series or parallel?
When run in series, one heater is basically just a storage tank. You also can shut down and remove one heater when run tandem. In series you are sol. Pros, cons? Click to expand... I prefer parallel ( which I think is what you called tandem). Just gotta keep your piping lengths right. Depends on the needs. Parallel... Always parallel..
How many on-demand water heaters do I need for my home?
For a larger home with three–four bathrooms, installing two on-demand units in parallel may be necessary to meet your needs. Supply distance. If you have fixtures or appliances located some distance apart, it may be advisable to install two or more point-of-use on-demand water heaters to avoid unnecessary energy losses and prolonged delivery times.
How many gallons of water should I put in a 40 gallon water heater?
How much does it cost to add a water heater to a home?
What piping method is used to add a second water heater?
What is the maximum pressure for a twinned heater?
How long does a water heater last?
What to do when you run out of hot water?
Do fossil fuel water heaters have flues?
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Can a home have 2 water heaters?
Greater efficiency can be achieved by installing multiple, smaller tankless water heaters throughout the home. Hot water is then drawn from nearby tankless appliances instead of being lead through the home's entire plumbing system from basement to point-of-use.
Why would a house need 2 water heaters?
If you have fixtures or appliances located some distance apart, it may be advisable to install two or more point-of-use on-demand water heaters to avoid unnecessary energy losses and prolonged delivery times.
Can you hook up 2 water heaters together?
0:131:40How to Pipe 2 Water Heaters in Tandem Water Heaters NowYouTubeStart of suggested clipEnd of suggested clipSo it's important that it comes to a bullnose t. And travels both directions the same distance. AndMoreSo it's important that it comes to a bullnose t. And travels both directions the same distance. And then vertically goes the same distance into each water heater.
How do 2 water heaters work?
Simply stated, 2 water heaters installed in Series means cold water enters the first heater, often referred to as upstream, and travels through the second heater, referred to as downstream, on it's way to the demand point.
How do you install two water heaters?
0:001:27How to install a second additional water heater in series - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd bridge a second gas line to your new water heater so you just split it add all the same partsMoreAnd bridge a second gas line to your new water heater so you just split it add all the same parts there as well is the exhaust is tapped in from this one. And put on to the second. One.
How many water heaters do I need for my home?
A small (50- to 60-gallon) storage tank is usually sufficient for one to two three people. A medium (80-gallon) storage tank works well for three to four people. A large tank is appropriate for four to six people.
Do I need 1 or 2 tankless water heaters?
For larger households that typically use more than 85 gallons per day, two tankless systems, or the largest available model, are likely needed. For smaller households that use under 40 gallons per day, one unit should suffice.
Can you use one water heater two bathrooms?
Question: Can one water heater be used for two and more bathroom (multiple usage points) Answer: Reason： Yes, of course.
Installing a second electric water heater - DIY Home Improvement Forum
Need to install a second electric water heater for a basement shower. Our needs have changed, and current (relatively new) 55 gal isn't providing enough hot water for early morning showers since the temps have dropped.
2 water heaters. tandem or series? - Plumbing Zone
How do you guys plumb 2 heaters? I always run them tandem. I think its best for both heaters to be fed and worked evenly. When run in series, one heater is basically just a storage tank. You also can shut down and remove one heater when run tandem. In series you are sol. Pros, cons?
How to plumb Two Water Heaters - DoItYourself.com
Water Heaters - How to plumb Two Water Heaters - Have two water heaters, side by side, Can I plumb one water heater into the other, going from first heater's hot output to the second heater's cold input?
Adding second water heater - Fine Homebuilding
I am finishing the basement of a 2 story home. Currently there is one 50 gallon gas water heater in the second floor right above the main floor master bath. This heater is also near one of the 2nd floor bathrooms. All of this is on the upper right of the house when viewing from the front. The full bath in the basement will be on the opposite side of the house and right below the kitchen and ...
Two water heaters, or one BIG one? - Fine Homebuilding
my vote is for a recirculating hot water system on a timer, if the standard 50 gallon water heater is big enough, you didn't say how big of a water heater you have now. if you have one 40 now, a 50 and added capacity of recirc might just do it. you just do a very detailed job of insulating the pipes and you increase the storage capacity and eliminate the wait for hot and waste of cold water.
How to determine how many water heaters you need?
To calculate your household’s peak demand, turn on all your hot water taps and appliances then note how many minutes it takes for the water to turn cold .
Why install two point of use water heaters?
If you have fixtures or appliances located some distance apart, it may be advisable to install two or more point-of-use on-demand water heaters to avoid unnecessary energy losses and prolonged delivery times.
How many gallons of water does a tank water heater hold?
Tank-style water heaters can keep 40–80 gallons of water hot and ready for use, so you can use the shower, dishwasher, kitchen sink and washing machine all at once. When the tank is depleted, though, it can take an hour or more to replenish the supply.
How do tankless water heaters work?
Tankless water heaters begin heating water when you turn on the hot water at a faucet or appliance. An on-demand unit won’t run out of hot water, but it can’t supply more than one–two fixtures at once.
What does it mean when two water heaters are lit up at once?
Twice as many heating elements lit up at once means that it will keep up with some very long showers - and have electric bills to match. If you go the route of two water heaters have them plumbed so you can bypass one of them in case one goes out and you can still have hot water.
What are the advantages of a water heater?
The advantages is a lower cost water heater, a back up in the event one fails, back up source and the ability to set differant temps should the need arise.
Is it bad to have two heaters?
Philosophically, this is a bad idea. With two heaters vs a big one, you have more surface, or "radiating" area for heat loss. Remember, these are essentialyy storage heaters, so the closer you can get to a spherical shape 9maximum volume with minimum surface area), the less loss you'll have.
Does solar hot water pay back faster?
if your family is using lots of hot water, your payback on solar hot water will come that much quicker.
Can you have instantaneous hot water with no waste?
Something else to think about.....What about the on-line systems? You can have instantaneous hot water with no waste. I don't know the pros and cons of one but sounds like you could use one or two of them.Semper Fi
Do you need a recircle system for solar water heaters?
you still need the recirc system with this, and higher up front cost, but your application may be ideal for it in that the major part of most peoples utility bill comes from making water hot.
Can you pipe in series with a dual heater?
I have seen parallel installations where one does all the work, and the other is just on standby. I usually pipe in series, because most of my dual installs are really just adding a heater to an existing one, and there isn't room or time to pipe in parallel, so I go series. The first heater is usually set at 135 and the second at 145, by the time the water gets to dish machines, it's 140.
Can you remove a heater out of a series?
One heater doesn't do all the work, but it does do alot more than the other. Because of this the second heater recovers quicker. You can remove one out of a series and leave hot water available if plumbed correctly. The tandem or parallel is a cleaner and easier install though.
Is undersizing a water heater bad?
We all know that undersizing a water heater is bad news. Customer is not happy because they're running out of hot water and when talking gas heaters, the flue condenses. So when the demand is such that two water heaters are needed to eliminate the unhappy customer and a series arrangement is used, the first one experiences the same set of issues an undersized water heater does, IMO.
What happens when hot water comes out of two water heaters?
In parallel, the incoming cold water is split between the two water heaters. Hot water coming out of the two heaters is combined and sent on to the fixtures.
What happens if you turn off the second water heater?
If you turn off the second water heater, then the water in the second one cools down between uses. This results in very long warmup times. If you want to turn one of these off, turn off the first one.
Why does my water heater go out when I turn it off?
I would surmise that your heaters are connected in series and that is causing surges when one unit is left powered off. This is because of the unbalanced state of heated vs cold water. When water moves from the cold to heated system the heavier cold molecules are compressing the heated molecules that are oscillating in an excited state. This is causing the pilot light to go out as a result. This is known as the Bernoulli principle that is rarely seen in liquids but it was identified as a interaction routinely seen when two disparate bodies of water collide in a circular reservoir. To avoid this you should eliminate the unused tank altogether or regulate the temperatures in both tanks to be within 15% variance of each other. I hope this helps.
How does a chimney affect a water heater?
Instead of warm CO2 floating up and away it sits under the water heater until there is no longer enough oxygen to maintain the flame. With two pilot lights going there's enough heat to the chimney that a sufficient draft can be maintained. With oxygen depleted air drafted up and away free oxygen rich air can be brought in to keep the flame burning. Wind speed and direction at the top of the chimney can affect the level of draft.
How to keep water heater lights lit?
First is to simply keep both lights lit. If they don't go out when both are lit then keep them both lit. The concern, besides the pilot going out, seems to be a desire to keep heating fuel costs down for hot water. How this can be done depends on the water flow path.
What is a series connection water heater?
A series connection means that there is one tank feeding the next. In this case simply set the temperature lower than that of the second. This is then feeding warmed water to the next so that it will not have to take as long o heat the water to a comfortable temperature. I would take care in this as water that is not hot enough will encourage bacterial growth. If the minimum safe temperature is already close to the desired temperature of your hot water then there may not be much savings. If the water heaters are in parallel then both water heaters would have to be match in temperature anyway.
Why do you have to shut off one water heater?
Leaving one heater closed off for a long time is a bad idea because the water can become stagnant and foul.
How many gallons of water should I put in a 40 gallon water heater?
So, if a 40-gallon water heater produces a gallon of thermal expansion, the tank volume should be at least 4 gallons. The majority of potable water thermal expansion tanks are available in a 4.5-gallon volume tank with a factory air-charge of 40 psi. Following installation, that air pressure should be increased to within a few pounds of your incoming municipal or private cold-water pressure.
How much does it cost to add a water heater to a home?
But depending on the extent of the re-routed distribution lines, installation of a separate stand-alone water heater can cost at least $900. Swapping out the too-small heater for a larger unit is another alternative, but the drawback is that the cost of the tank and its installation can easily exceed $1,500. Provided that the existing water heater is relatively new and functions properly, we often recommend adding a second heater and coupling the two to double the supply capacity. This solution averages $700, a substantial savings over the cost of a stand-alone installation.
What piping method is used to add a second water heater?
Once it's determined that adding a second tank makes sense, there are two basic piping methods that work well: reverse-return and series. Each offers independent operation if one water heater fails or needs servicing. Other incorrect piping methods commonly but erroneously used to add a tank not only perform poorly but may also cause stagnation and ensuing water-quality problems.
What is the maximum pressure for a twinned heater?
Twinned heaters can be served by a common expansion tank large enough to handle their combined volumes, or each heater can have its own properly sized expansion tank. These must be rated for potable water and a minimum pressure of 150 psi. Note that standard heating system expansion tanks are rated for a maximum of only 30 psi. Be aware also that thermal expansion tank manufacturers may base their sizing requirements on warmer incoming water temperatures and lower finished water temperatures than may be the case, either of which can lead to undersized thermal expansion tanks, a stressed heater, and a dripping relief valve.
How long does a water heater last?
Water heater life expectancy averages 10 to 15 years. While standard efficiencies hover around 80%, a few gas-fired models offer up to 99% efficiency. The built-in redundancy of a second tank offers the added luxury of never being without hot water, even if one tank fails. And as energy costs rise, the relatively higher price ...
What to do when you run out of hot water?
One of the first things done by the average homeowner who is running out of hot water is to turn up the thermostat on the storage tank. This actually makes some sense because less hot water is required to achieve the same mixed temperature ratio. Raising the storage temperature from 120°F to 140°F will increase energy costs for a standard water ...
Do fossil fuel water heaters have flues?
But remember, a fossil-fuel water heater requires adequate flue-pipe sizing to effectively vent the carbon monoxide produced. If both the new and existing water heaters must share a flue, the flue size must be increased at the junction by at least one pipe diameter.
