Can I downsize a water heater?

Author: Xavier Erdman DVM  |  Last update: Friday, May 29, 2026

For installations where space is an issue, like in closets or multifamily housing, a smaller capacity water heater will be necessary. That means replacing the 30 gallon water heater with a 20 gallon water heater due to the size constraints.

Can I replace a 50 gallon water heater with a 40 gallon?

While we recommend 50-gallon heaters for their benefits, we understand that not every space can accommodate the larger size. Our technicians are trained to assess the space available in your home and, when necessary, install a 40-gallon unit if a 50-gallon heater won't fit.

Should I buy a 50 gallon or 75 gallon water heater?

To answer your question though, a 50 gallon water heater will do just fine for a family of four. You could replace it with another 75 gallon unit if you want, but the price of these things starts to climb quite a bit when you look at anything larger than 50 gallons.

Is a 40 gallon water heater enough for a 3 bedroom house?

Many clients ask me, "What size water heater is right for this home?" Common rule of thumb is that a 40 or 50 gallon tank is suitable for most 3-4 bedroom and 3 bathroom homes.

Do I really need an 80 gallon water heater?

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.

What Size Water Heater Do I Need? Solved! | Water Heaters 101

Why are 80 gallon water heaters discontinued?

The National Appliance Energy Conservation Act of 2015 has significantly restricted the availability of electric water heaters over 55 gallons due to stringent energy efficiency requirements.

Can you get too big of a water heater?

Contrary to energy savings expectations with tankless water heaters, an oversized unit can lead to higher energy bills. When a water heater is oversized, it can lead to inefficiencies and increased energy consumption, impacting your monthly utility costs.

How many showers can you take with a 40 gallon water heater?

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. This also depends on how much hot water you use for other things.

Is a 50 gallon water heater better than a 40 gallon?

If you are on a budget, a 40-gallon may be the better option for you. Water Heater Efficiency: When it comes to efficiency, a 50-gallon water heater is going to be more efficient than a 40-gallon water heater. This is because it will have a lower recovery time, which means it will take less time to heat the water.

Is Rheem or AO Smith a better water heater?

If you're looking for a reliable, efficient, and cost-effective water heater, Rheemhas the edge over A.O. Smith. With superior energy efficiency, longer warranties, and better overall performance, Rheem units are designed to meet the needs of modern homeowners.

What is the average labor cost to install a 50 gallon gas water heater?

In general, plumbers cost $45 to $200 per hour, while electricians cost $50 to $100 per hour. Expect the following average price ranges for labor alone: Replacing a tank-style water heater: $150–$450. Replacing a tankless water heater: $600–$1,850.

What is the downside of a tankless water heater?

Before you commit to buying a tankless water heater, the primary drawbacks to know include: Higher upfront costs. Tankless water heaters are, on average, quite a bit more expensive to buy and install than tank water heaters. Access to fuel.

Who needs a 75 gallon water heater?

Do I Need a 50 or 75 Gallon Water Heater? A 50 gallon water heater is sufficient for a household of 3 to 4 people. If you have over 5 people in your home, you may require a 75 gallon hot water heater.

Do I really need a 50 gallon water heater?

If you have a large family or use a lot of hot water, you might consider a 50-gallon water heater. This size is beneficial if someone in your family takes long showers or if you have to do laundry frequently. The initial cost of a 50-gallon water heater will be more than a smaller model.

What is the life expectancy of a 40 gallon water heater?

Traditional Tank

The water is heated at least once a day to ensure a steady and ready supply of hot water. On average, these water heaters last between 8 to 12 years. They're often affected by sediment buildup. Annual flushing of the tank can help to extend a tanked water heater's lifespan.

How long does it take to change a 50 gallon water heater?

Tank to Tank Installation: On average, replacing a gas or electric water tank with a similar model takes two to three hours. It takes between 45 to 60 minutes to drain, disconnect and remove your old water heater.

What are the downsides of a larger water heater?

Oversized water heaters consume more energy than properly sized models, so your utility costs are noticeably higher. Plus, bigger models are more expensive upfront, so you've also wasted money on the initial equipment purchase. The same goes for tankless water heaters that are too big – they waste energy and money.

How long of a shower can you take with a 50 gallon tank?

With a low gpm head and full hot you should be able to get 20 min out of 50 gallons. Now you turn down the hot and add a little cold and you should get more time in a less hot shower. If you need more time you could turn up the water heater and use a less hot water to cold ratio. That would get you a few more minutes.

Should I buy a water heater from a plumber?

Water Heater Quality

The units available at a retail store or online typically are not the same as those sold through a local plumber. Low retail prices are often possible due to lower product quality and the use of less durable components.

Can you replace a 40 gallon water heater with a 50 gallon water heater?

40 Gallon Water Heaters Are No Longer a No-Brainer

Simply put, the trend we're seeing is that 40 gallon replacement tanks have been going out of style with many homeowners whose hot water needs are considered to be somewhat 'normal' – and in many of these cases, 50 gallon heaters are taking their place.

How much hot water does a 10 minute shower use?

Generally, taking a shower uses less water than a full bath. A standard showerhead flows at a rate of 2.5 gallons per minute . This means that a ten-minute shower only uses 25 gallons of water.

Is a 40 gallon water heater enough for a family of four?

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.

Can you downsize a water heater?

For installations where space is an issue, like in closets or multifamily housing, a smaller capacity water heater will be necessary. That means replacing the 30 gallon water heater with a 20 gallon water heater due to the size constraints.

Is AO Smith a good water heater?

A.O. Smith water heaters have long been praised for their durability and excellent performance. This reputation can be partly attributed to the high-quality components utilized in making these heaters. Corrosion-resistant materials, such as glass coated heating elements and stainless-steel tanks, show A.O.

Should I oversize my water heater?

Making sure you have a properly sized water heater is very important. If your water heater is too small, your home won't have enough hot water to meet demand, which is an obvious inconvenience, and overloading the unit may cause premature wear and tear. There's no benefit to oversizing a tankless water heater.

Previous article
How to get air out of the toilet system?
Next article
How to accelerate the growth of a tree?