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A water heater becomes a life saver, especially during this COVID-19 pandemic.
But the hot water supply can be interrupted if you fail to install the right size water heater for your family of 4 or other numbers.
Thus, you should determine what size water heater for a family of 4 so you can choose accordingly and protect the family from cold water usage and its related disease.
Following, we have mentioned the right size water heater for a family of 4 and the formula to determine it wisely.
What Size Water Heater For A Family Of 4?
A 50-gallon water heater would be an excellent option for a family of four people. The family won’t face any trouble at the rush house using a 50-gallon electric water heater, conversely, 40 gallons of propane or gas-powered water heater is also sufficient.
Determining Tank Size Based on Family Size
The storage capacity of typical tank-style water heaters varies from 30 to 80 gallons. A water heater with 40 to 60 gallons is good enough for most homes.
But the exact size of a tank depends on the overall hot water demand of a certain family.
So you have to go through a calculation to figure out the right size water heater for the household. Below is some basic information to start with:
- A 30-gallon water heater is a good option for a family with one or two-person
- The 40-gallon water heater is the ideal size for a family of two to three people.
- The 50-gallon water heater is preferable for a four-person family, especially if the family has electricity. Otherwise, a 40-gallon water heater can be used with propane or gas.
- Finally, you can choose between a 50-gallon gas water heater and an 80-gallon electric water heater for a family of over five people.
Again, it’s only a basic idea, and the hot water requirement varies from one household to another. Apart from the family member, the habits of the user also affect the calculation.
Read More: What Size Generator To Run Hot Water Heater?
For example, some people spend more time in the shower than others, and some houses may have more kitchen appliances.
Thus, it’s better to determine how much hot water is required for a family to decide on the right size water heater for them.
Keep these points in mind to determine the regular usage of hot water:
- Number of people takes shower and their spending time
- Whether the family uses a major appliance while someone is showing
- The filling capacity of the appliance that the family uses
- Do they use the bathtub regularly and fill it fully or halfway?
- Does anyone have a plan to remodel the bathroom or kitchen within a short time? And will they replace the bathtub with a larger size?
- In general, water heaters come with an average lifespan of around 15 years. Will the family members increase soon?
Evaluating the Peak Hour Demand and First Hour Rating
After surveying certain families’ lifestyles, the next step is to find out the PHD (Peak Hour Demand) and FHR (First Hour Rating) to determine the hot water requirement.
Let’s start with learning. What is the peak hour demand really? It’s the amount of hot water that the family uses during rush hour. The rush house is the time of the day when the family uses most of the hot water.
For some families, the peak hour is around 8 p.m., when the family member prepares for bed. even if it’s 6 am when the family member prepares for the office or school.
Now focus on the first-hour rating. Likewise, the PHD, FHR is the hot water amount that a heater can supply in one hour.
Remember, it’s the same amount of water that a water tank can hold. Apart from that, FHR also depends on the fuel source and the burner size. Some water heater brands also provide the FHR information with the product.
The following is a list to aid in determining peak hour usage. But remember, the PHD should always be slightly lower than the FHR.
- Manual Dishwashingby hand: 4 gallons
- Shaving: 2 gallons
- Automatic dishwasher: 14 gallons
- Face or hand washing (per member): 4 gallons
- Hair shampooing (per member): 4 gallons
- Showering (per member): 10-15 gallons
- Automatic washer: 10-30 gallons
So, what size water heater is best for a family of 4? In the morning, if two members shower, one wash face, and one shave and use dishwasher machine, the tank size of the water heater will be 50 gallons.
Apart from it, you should also concentrate on the water temperature. The inlet water temperatures vary by season and area. Generally, a family requires more water in the winter season than in the summer. Thus, the focus should be mainly on the winter.
Best Water Heater For A Family Of 4
1. Rinnai V94iN 9.8 GPM Natural Gas Tankless Hot Water Heater
2. Noritz EZTR40NG 40 gal Tank Replacement Indoor Tankless Water Heater
3. Hayward W3HP21404T HeatPro 140,000 BTU
4. SRCC Certified 26% Tax Credit & Local Rebate Eligible
FAQs About Right Size Water Heater For A Family Of 4
Can A 40-Gallon Water Heater Properly Serve A Family Of 4?
In general, a 40-gallon tank can serve a family of 1 to 4 members, while 50 gallons is perfect for up to 6 people. Considering the average requirement, the 40-gallon tank can be workable for a family of 4.
Is A 30-Gallon Water Heater Effective For A Family Of 4?
The 30-gallon water heater is usually for a family of two members. So it may not supply enough hot water, especially in the rush hour.
How Many Showers Can Be Taken With A 40-Gallon Water Heater?
A 40-gallon hot water tank allows four average-length showers. The number can be lower if any family member spends much time in the shower.
The first and most important task is determining what size water heater to buy for a family of four in order to have enough hot water to avoid using cold water and its diseases.
Hopefully, you have got enough ideas and formulas to determine what is the right size water tank to meet the demands of your family.
Lastly, the usage of water for certain households varies, so collect the information practically instead of depending on those basic ideas or simply constructing with a licensed plumber.