How to Figure Out What Size Water Heater I Need?

Residential water heater capacity varies from 40 to 100-gallons. Since every family has different hot water needs, it is important to choose the right size for your home.

If you choose the wrong tank size, you may end up getting a water heater that is too small or too large for your house.

If you buy a smaller size water heater, it will run out of hot water fast and if you buy one larger than your need, you will end up paying more energy bills for hot water that you won’t use.

Choosing the right size water heater is often a major dilemma for homeowners. Here are some tips that can help you figure out what size water heater is right for your home.

Understand your Hot Water Needs

Search for the right water heater starts by understanding your hot water needs. This mainly depends on the number of people living in your household and their lifestyle habits. You need to consider shower time, bathtub size, and back-to-back showers. Also, consider other appliances in the household such as washing machine, dishwasher etc. Determining these factors is key to understanding your water usage and choosing the right water heater for installation in San Jose.

Water Heater’s First Hour Rating (FHR)

This rating describes the water heaters’ efficiency. It shows the amount of water the appliance can provide in a single hour. The first hour rating gives an idea what the water heater can handle at a peak hour of usage.

Estimate your Peak Hour Demand

This is the amount of water that is typically used during the busiest hour of the day.

For instance: If 2-3 people take showers back-to-back, while running a washing machine and doing Laundry. In that case, the total hot water consumption would be around 65 gallons. So typically, you should a water heater with an FHR of at least 65 gallons per hour.

 Space Requirements

Consider the place where the water heater will be installed and the available space. A large storage water heater will require a large space for installation. That’s why storage water heaters are often installed in places away from general living such as basement or closet. For those with limited space, a tankless water heater is a great choice.

Type of Fuel Used by the Water Heater

The type of fuel also affects your selection of water heater. There are mainly three types of fuel: electricity, natural gas, and propane. Gas or propane water heaters are more efficient than electric water heaters. This means that if you want to buy an electric water heater you may need a bigger tank compared to gas or propane.

Cost of water heater

This includes both the upfront cost and the cost of operating and maintaining it. You can also compare the Energy Factor (EF) of different water heaters. It is a measure of the heat produced per unit of fuel. The higher the EF rating, the more energy efficient your water heater will be.

So, these are some of the factors you should consider for choosing a water heater size for your home. Usually, a 40-gallon water heater is ideal for a small household of 2 to 3 people. While a 60-gallon water heater is better suited for a larger household of 4 to 6 people. However, these are just estimates and your exact needs may vary. That’s why you should consult with a professional to get the best possible solution for your budget and requirements.

Whether it is water heater installation, air conditioning or furnace maintenance in San Jose, AAA Furnace & Air Conditioning is the name you can trust.

7 Maintenance Tips for Your New Water Heater to Follow

To ensure the longevity of your water heater, prioritizing its upkeep is an absolute necessity. By following simple maintenance tips, you can not only prolong the life about also prevent costly repairs. Here are some essential tips for the maintenance of your new water heater.

  1. Reading the manual

It is one of the most basic things that most people forget or simply avoid. After water heater installation in San Jose, take some time to read the manual provided with your water heater. The user manual contains information specific to the model of your water heater. It includes maintenance guidelines, troubleshooting tips, and safety precautions. All the information helps understand the unique requirements for your water heater.

  1. Don’t neglect Temperature Settings

Setting the right temperature is important to ensure safety, at the same time, it ensures optimal energy consumption. It is recommended to keep the water heater temperature around 120 degrees Fahrenheit. It is the optimal temperature for most household needs. If you keep the temperature too high, it will increase the risk of scalding, and the energy usage will be much more.

  1. Inspecting Leaks Regularly

To avoid water wastage and damage to the equipment, it is important to perform regular inspections. During the visual inspection look for signs of leaks. Any moisture on pipes or connections is a sign of leakage. You should also notice unusual sounds around the unit. If you notice any leaks or unusual sounds, contact a professional immediately.

  1. Check Pressure Release Valves Monthly

The pressure release values play a crucial role in preventing the buildup of excessive pressure on the tank. Test the functionality of the pressure release valve every month. Open the value slightly and place a bucket underneath to check if the water is flowing freely.

  1. Perform annual sediment Flush

The accumulation of sediments and minerals in the water heater tank can affect the efficiency of your water heater. If neglected over a period of time, it can also cause damage to the water heater. To prevent such incidents, remember to perform annual sediment flush annually. Open the drain valve to empty the tank.

  1. Insulate Hot Water Pipes

To improve energy efficiency, insulate the hot water pipes. Insulation helps maintain the temperature of the water as it moves through the pipes. It also ensures that the water travels more quickly. In the absence of insulation, energy efficiency can suffer as the same water heater needs to work harder.

  1. Necessary cleaning

You can schedule occasional professional maintenance to inspect the water heater thoroughly. It is important to get the water heater checked by a professional occasionally for potential issues. The necessary cleaning of water heater may also be required occasionally to ensure the best performance which can only be done by a professional.


These simple maintenance tips help you keep your water heater in the best condition for years to come. Temperature setting adjustments, regular inspection, and sediment flushing are some of the key things to extend the lifespan of your water heater and ensure saving on energy bills.

AAA Furnace and Air Conditioning provides impeccable heating and cooling solutions to improve the air quality of your home. We also offer furnace installation in San Jose to reduce Carbon Dioxide emissions and improve indoor air quality.


Some Key Things to Do Before Getting Water Heater Installation at Your Home

Are you ready to get a new water heater? It might seem like an easy, one-time decision that’s not really worth much thought. However, there are actually many details to consider before you can move forward. You should be sure that you’re getting the right type of water heater for your home and lifestyle, as well as one that is appropriate for your budget and available space in your home or apartment building. This article will explore some of the most important considerations you should make when planning for water heater installation in San Jose, or elsewhere, at your home or apartment building.

Look at your water heater

To ensure that you’re getting the best possible water heater for your home, it’s important to know what kind of water heater is currently installed. The first thing to look at is age. If it’s over 10 years old, it may be time for a replacement. You can also use this opportunity to check energy efficiency and capacity–these two factors should be taken into account when purchasing a new water heater so that you get one that meets all of your needs while still being cost-effective.

The temperature of your current system will tell you whether or not it needs replacing as well; if there are any issues with this aspect of the unit (such as low flow rate), then this would be an indicator that something needs fixing or replacing altogether! Also, keep an eye out for pressure issues on these systems. If yours does not have enough pressure within its pipes due to corrosion from years’ worth of use (or lack thereof), then this could cause problems down the line when trying to use hot water throughout different areas within your house!

Look at the new water heater

When you are looking at a new water heater, it’s important to look at the following:

  • The size of the water heater. The size will determine how much hot water you have available and how long it takes to get hot.
  • Type of water heater – electric or gas-powered? If you live in an area where electricity is not reliable, then consider getting a propane-powered unit instead of an electric one because it doesn’t rely on electricity for operation!
  • Wattage – higher wattage means faster heating times but also higher energy bills! You’ll want something that works well with your lifestyle so don’t be afraid to ask questions about efficiency ratings if necessary (also check out this article if curious).
  • Tank capacity – bigger tanks mean fewer refills throughout the day/night cycle which means less time spent waiting around while your shower heats up again after taking one too many showers back-to-back without stopping first thing in the morning before heading out the door without even eating breakfast yet!
  • Insulation material used inside tank walls determines how long heat lasts once turned off; good insulation helps prevent condensation from forming inside pipes when temperatures drop below freezing point outside during winter months.

Check the water in your home

  • Check the water pressure.
  • Check the temperature of your water.
  • Look for leaks or sediment in your pipes.

Plan ahead to make your life easier

Planning ahead is a great way to make life easier. When it comes to water heater installation, planning ahead can save you money and make the process much less stressful.


  • You don’t know how to properly install a hot water heater; or
  • Your local building code requires permits/licenses before doing such installations; then hiring an experienced professional might be more cost-effective than attempting to do so yourself.

Here are some things that you should do before getting your water heater installed:

  • Choose the right contractor. You may be able to install your own water heater, but if not, it’s important that you hire someone who has experience installing them in homes like yours. Hiring someone who knows what he or she is doing will ensure that everything goes smoothly during installation and reduces any chance of error later on down the line when using the appliance regularly around your home (or even just checking on its status).:


We hope this article has given you some insight into what you can do to prepare for water heater installation in San Jose, or wherever you reside. Remember that there are lots of things to consider, so don’t rush into it without doing some research first!