Water Heater Sizing Calculator (Based On Family Size)
| Family Size | Water Heater Size (Gallons) |
| Family of 1 | 25 Gallons |
| Family of 2 | 35 Gallons |
| Family of 3 | 45 Gallons |
| Family of 4 | 55 Gallons |
Full Answer
What is the average size of a residential water heater?
7 rows · 3×20 gallons (3 showers) + 1×2 gallons (shaving) + 4×0.5 gallons (washing teeth) = 64 ...
What size tankless water heater do I Need?
Typically, the rule-of-thumb is that you want a 40 gallon tank for 1 to 4 people, a 50 gallon tank for 4 to 6 people, and a 50 gallon high recovery or 75 gallon tank for 6 to 8 people. Energy consumption for 40 and 50 gallon standard water heaters is quite comparable. Consequently, what size water heater do I need for a family of 5?
How many Watts Does It take to heat water?
Mar 13, 2022 · The cost per person would be around $30 for a 30-gallon water heater. Two to three people should own a 40-gallon water heater. Several small households are likely to need 40-50 gallon water heaters. There are 5 or more water heaters needed by 80 gallons or more.
How to size your water heater?
Apr 06, 2022 · Step 1: Calculate How Many GPM for Your Tankless Water Heater You can calculate your own maximum GPM by adding up the flow rate of each individual fixture that uses hot water in your home. This is just a way of measuring how many gallons of hot water could run through the fixture per minute.
Is a 50 gallon hot water heater enough for a family of 4?
For a four-person family, a 50-gallon water heater is sufficient. 50-gallons is good if you're using electricity, and 40 gallons will work for natural gas or propane. Families with more than five persons may benefit from an 80-gallon electric water heater or 50-gallon gas water heater.Nov 30, 2019
Is 40 gallon water heater enough for a family of 4?
Typically, the rule-of-thumb is that you want a 40 gallon tank for 1 to 4 people, a 50 gallon tank for 4 to 6 people, and a 50 gallon high recovery or 75 gallon tank for 6 to 8 people.Nov 19, 2015
How many gallons do you need for a water heater?
Water Heater Sizes The answer to this question will vary depending on the total number of kids you have. For example, a family of 3 to 4 people should purchase a 50 – 60 gallon water heater. On the other hand, a household with 5 – 7 people may require a water heater with a 60 – 80 gallon water tank.Jun 8, 2020
Do I need a 30 or 40 gallon water heater?
A 30-gallon tank would generally be enough for one or two people. A family of three to four will likely need a 40-gallon water heater, but you might need a larger tank if you use a lot of hot water.Jan 13, 2022
How many showers can you have in a 40 gallon tank?
A 40-gallon water heater can provide up to 2 showers in an hour (if you're not using any other water appliances).Sep 26, 2017
Is a 10 gallon water heater enough for a shower?
Determining how much hot water your water heater should provide per shower depends largely on the size of your hot water tank. For instance, a typical shower uses about 10 gallons of hot water. So, if you have a 40-gallon hot water tank, you should be able to get four average-length showers out of your hot water tank.Mar 3, 2020
Is a 20 gallon hot water heater big enough?
20-gallon water heaters are a unique size. They're large enough for smaller homes that don't require large amounts of hot water, yet they're an excellent choice for high-demand point-of-use (POU) applications such as bathrooms with showers. The versatility of the 20-gallon size makes these heaters ideal for many uses.
What size water tank do I need for a family of 4?
So with a family of 4 that has visitors staying occasionally, you could need 225,000 -250,000L of water per year. As your tank should fill up by the end of winter, you may not need a 250,000L tank but simply enough water in storage to get you through the 6-7 months of dry weather with a bit of buffer.Feb 14, 2015
How many showers can you put in a 50 gallon water heater?
On a national average of 8 minutes to take a shower you can can get 2 showers out of a 50 gallon water heater. Based on 17 minutes of hot water run time at 2.1 gallons per minute shower head flow calculation also from a 50 gallon water heater.
Is a 30 gallon hot water heater big enough?
1-2 people need a 30-gallon water heater. 2-3 people need a 40-gallon water heater. 3-4 people need a 40-50 gallon water heater. 5 or more people need a 50-80 gallon water heater.
Is 30 gallon water heater enough for 2 people?
A 30 gallon water heater should be able to supply enough hot water to meet the needs of a household of 1 -2 people with only one bathroom. A good way of measuring your hot water requirements is calculate your peak hot water usage and compare it the first hour rating of a water heater.
How long should a shower last with a 40 gallon tank?
Typically with a 40 gallon hot water tank your hot water should last about 20 minutes. This would be assuming that the hotline was 100% over on the hot side. If you mix the hot water then you can get up to 45 minutes of shower time on a 40 gallon tank.
What temperature should a tankless water heater be?
In this case, you would want a tankless water heater with a temperature rise of 50 degrees. Based on average ground water around 50 degrees, here are the sizes you would need for a tankless unit based on your ...
What are the two types of water heaters?
There are two primary types of water heaters: storage tank water heaters and tankless. Before finding the right size water heater, you must determine which type you’re going to purchase
Is a water heater an investment?
A water heater is an essential investment for any home. That being said, it's important to make sure you buy one that’s correctly sized in order to meet your family’s needs. Otherwise, you may be left without warm water for your morning shower more often than you'd like.
How many gallons of water does a tank heater need?
You can estimate the necessary tank capacity (in gallons) based on the number of people in the house: 1 or 2 people—23 to 36 gallons. 2 to 4 people—36 to 46 gallons. 3 to 5 people—46 to 56 gallons.
How big is a 50 gallon water heater?
For example, a 50-gallon tank water heater can be as much as six feet high and 22 inches in diameter . But a tankless option with comparable output—for instance, the Takagi Tankless Natural Gas Water Heater (available from SupplyHouse )—is just 20 inches high, 14 inches wide, and less than 10 inches deep.
What is the FHR rating for a water heater?
In addition to tank capacity, consider a water heater’s first hour rating. The first hour rating (FHR) describes how much hot water a given tank can produce in a single hour when it’s fully heated. This figure reflects the appliance’s efficiency (how quickly the water heater can reheat the water) and gives an idea of what it can handle ...
How many gpm does a dishwasher need?
Dishwasher—3 gpm. Clothes washer—3 gpm. For example, if your peak usage occurs after dinner when you’re running the dishwasher and taking a shower at the same time (3 gpm + 2.5 gpm), you’ll need a tankless water heater with a minimum 5.5 gpm flow rate. Next, determine the temperature of the water entering your house.
Do tankless water heaters store hot water?
Tankless water heaters do not store hot water. Instead, they heat it as it’s needed. “Flow rate is the key spec when sizing a tankless water heater,” O’Brian says. The following information will help you estimate your family’s flow rate needs.
Which is better, gas or electric water heater?
There’s no easy answer as to whether gas or electric tankless water heaters are better, as it depends on your own circumstances and preferences. Electric tankless water heaters are typically better suited for point of use applications and in homes with smaller water demands.
Is EcoSmart Eco 27 a good water heater?
In this scenario, if the family was limited to electric models, a higher volume tankless water heater, like the EcoSmart Eco 27 Electric Tankless water heater would be a good choice.
Is gas cheaper than electric?
In most regions, gas may be much more affordable for long term use. If the price and availability of gas and electric are fairly similar in your region, you may also want to consider which features of a tankless water heater are most important to you.
How many GPM is 60 psi?
For water conservation purposes, the Federal Energy Policy Act of 1992 requires that all lavatory (bathroom) faucets sold in the U.S. have a flow rate of no more than 2.2 GPM at a water pressure of 60 psi (pounds per square inch). According to the same law, showerheads may have a maximum flow rate of 2.5 GPM.
What size tankless water heater do I need for a family of 5?
Like, a hot water tank for 5 people will require at least a 60-gallon tank. Since tankless water heaters supply endless hot water, you don’t have to worry about capacity, but instead, think in terms of water flow rate. Gallons Per Minute (GPM) is the key when it comes to sizing tankless water heaters.
What size water heater do I need for a family of 5?
3 – 4 people, you’ll need at least a 50-gallon capacity tank (electric) or a 40-gallon capacity tank (natural gas or liquid propane). If your family size is 5 or more, you’ll need an 80-gallon tank (electric) or a 50-gallon tank (natural gas or liquid propane).
Does GPM affect water pressure?
Shower heads are measured by flow—the number of gallons they deliver per minute (gpm). Flow is affected by water pressure, measured in pounds per square inch (psi). Water pressure on the high side—80 psi, for example—will push a greater amount of water through a shower head than low water pressure, say 20 psi.
How many gpm do I need for sprinklers?
At different pressures, the sprinkler head and nozzle will consume different amounts of water. For example, at 35 pounds per square inch (PSI) the 5000 Series Rotor using the 3.0 nozzle will use 3.11 gallons per minute (GPM). If your home’s water capacity was 10 GPM, you could place 3 heads per zone.
What should my water flow rate be?
The easiest way to get a fairly accurate measure of your water flow rate is to time yourself filling up a bucket. So for example if you fill up a 10 litre bucket in 1.5 minutes, then your flow rate will be: 10/1.5 = 6.66 Litres per minute. Don’t get confused between flow rate and pressure.
Can a tankless water heater fill a tub?
A small tankless water heater can take a long time to fill a large tub. Third, if for some reason a larger water heater cannot fit, and the properly sized tankless is too expensive, you can add a second standard water heater next to your present tank. Two smaller water heaters can do the job of one big water heater.
