Is it better to have one large water heater or two smaller ones?

By Robert Flores / October 27, 2022

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.

Is an electric tankless water heater worth it?

For many people, the long-term benefits of tankless heaters more than compensate for their initial expense. A tankless heater can be up to 34% more efficient than a traditional water heater. This increase in efficiency can amount to annual savings of over $100, depending on the type and size of the heater. Jun 10, 2022

What size water heater do I need for family of 4?

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.

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Does an electric tankless water heater need to be vented?

Unlike gas or propane tankless water heaters, electric tankless water heaters do not need venting because they use electric burners to heat water rapidly. Since no natural or propane gas is used, no venting is needed. Jul 15, 2022

What is the most efficient hot water heater?

A hybrid water heater or a heat pump water heater is one of the most energy-efficient electric water heaters available nowadays. Such units do require electricity to move heat. Mar 30, 2022

What is the most common problems with tankless water heaters?

Here are six of the most common problems and maintenance concerns for tankless water heaters: Mineral Buildup. System Overload. Cold Water Sandwich. Air Supply or Exhaust Blockage. Ignition Failure. Flame Failure. Mar 9, 2022

How much does it cost to switch to tankless water heater?

An electric tankless unit will cost about $500 to $700, roughly the same as a traditional tank model, while the cost of a gas tankless heater runs about $1,000 to $1,200. Beyond the initial cost, the national average for the installation of a tankless unit is slightly over $1,700.

How long do tankless water heaters last?

Some people hesitate to decide on a tankless water heater because they can be a slightly higher cost; however, you get significantly more life out of one. A standard water heater tank lasts about 8-12 years. A tankless water heater can last as long as 25 years!

How long will 250 gallons of propane last?

A 250-gallon propane tank lasts for anywhere between 26 days to 7 months and 2 days. That’s quite a wide range. The longevity of a 250-gallon propane tank depends on use (how much propane per day you burn). This is indirectly connected with how big a house you want to heat with a 250-gallon propane tank.

How long will 500 gallons propane last?

A 500-gallon tank holds 400 gallons of propane and can last several months, ranging between 2 to 14 months. On average, homeowners can expect that the tank will last around 5 months with regular use of appliances. May 25, 2022

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Is it cheaper to heat with electric or propane?

Propane heat is more economical and more efficient than electric heat. Virtually anything in your house, restaurant or building that can run on electricity can run on propane. However, the cost of a propane fueled home is actually less than the cost of a home with electric heat.

Can I replace my tank water heater with a tankless?

Yes. The initial cost of converting your tank water heater to a tankless is expensive. Tankless water heaters are 3x more expensive than your average tank water heater. However, the energy savings and supply of endless hot water can outweigh the cost for many. Feb 18, 2021

Which is better 40 or 50 gallon water heater?

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. Nov 19, 2015

Can I install an electric tankless water heater myself?

As a homeowner you are usually allowed to install a water heater yourself. However, in most states you must still pull a permit to have it inspected for safety. This also goes for replacing an old water heater. Sept 27, 2022

Where do you put a tankless hot water heater?

The ideal location for your water heater is inside the home. Most installations are small and unobtrusive so they will easily fit in a pantry, under the stairs, or under your sink. If you must place the water heater outside, make sure it’s safe from direct sunlight, rain, and insects.

Does a gas tankless water heater need to be vented?

Tankless hot water heaters require special venting to blow hot exhaust gas outside, where it dissipates. Unlike traditional tank-style water heaters, gas tankless hot water heaters offer far more versatile venting options. Oct 15, 2012

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How far does a tankless water heater need to be from a window?

Indoor Installations A tankless water heater requires a 4-foot clearance from the side or below a door or window that opens, unless the unit is directly vented to the outside, says Ernie Graves. If the water heater is installed above the door or window, it needs 12 inches of clearance.

Does cold weather affect tankless water heaters?

If the water is colder, the tankless water heater can’t provide as much hot water per minute because it takes longer to heat it. Just like it would take you longer to cook frozen food than refrigerated food. Dec 21, 2021

What is the difference between an indoor and an outdoor tankless water heater?

An indoor tankless water heater is installed inside your home. An outdoor unit is installed outside the home and is designed to withstand the elements. If you live in a climate where temperatures drop below freezing, you must always be sure to take precautions to avoid freeze damage, such as draining the unit. Mar 9, 2022

Can a tankless water heater supply a whole-house?

Both gas and electric water tankless heaters can function as whole-house solutions or as a smaller “point-of-use” system. Smaller single-use tankless water heaters heat water for just a single room, tap, or appliance. These larger and smaller systems essentially work in the same way.

Resources

https://www.eemax.com/2015/02/distributed-generation-when-two-water-heaters-are-better-than-one/
https://www.homeserve.com/en-us/blog/buying-guide/tankless-water-heater/
https://www.energy.gov/energysaver/sizing-new-water-heater
https://www.monkeywrenchplumbers.com/learning-center/existing-venting-for-tankless-water-heater

What Type of Water Heater Is Most Energy Efficient?


https://www.eccotemp.com/blog/6-common-tankless-water-heater-problems-and-how-to-solve-them/index.php
https://www.ahs.com/home-matters/repair-maintenance/installing-tankless-water-heater/

The Pros and Cons of a Tankless Water Heater

How Long Does A 250-Gallon Propane Tank Last For A House?

How Long Do 250 and 500 Gallon Propane Tanks Last for a House?


https://www.petro.com/resource-center/propane-vs-electric-heat
https://www.mgpmechanical.com/blog/converting-to-tankless-water-heater

Buying a Hot Water Heater? Here’s What You Should Consider

How to Install an Electric Tankless Water Heater + Installation Requirements

Where to Put Your Tankless Water Heater


https://www.rinnai.us/announcements/7-tips-tankless-water-heater-venting
https://homeguides.sfgate.com/setback-window-tankless-water-heater-105718.html

Does a Tankless Water Heater Work Well in Cold Climates?


https://www.eccotemp.com/blog/tankless-water-heaters-indoor-vs-outdoor/index.php
https://www.protoolreviews.com/how-do-tankless-water-heaters-work/

About the author

Robert Flores