Tankless Water Heaters

Water Heater Types

Tankless water heaters or also known as on demand water heaters can be easy to maintain and even install! So today we will look at the major differences between electric tankless water heater and gas tankless hot water heater. There are some big benefits of using one over the other price tend to be relative between both sources of tankless electric water heater and also gas tankless water heater and we will cover these advantages and disadvantages in this article.

What Are Tankless Water Heaters?

Tankless water heating systems, or many refer to them as instantaneous or on demand water heating systems, constant circulation, inline, flash, on-demand, or instant-on water heating units they offer warm water when and where you need it within the house!

Video credit to Steve Maxwell

These are becoming more and more popular in our homes. Traditional or the typical storage tank water heaters create energy losses that will increase your cost via loss of efficiency. The major benefits of tankless water heating units are constant flow of warm water (as in  comparison to a limited flow of continually heated warm water from traditional tank water heaters), and possible energy savings in general. The main drawback of these systems are their high initial prices, installation and equipment costs are high.

We only warm our houses when we need in the same method that tankless water heater is utilized just when the need for hot water and this is the main advantage of a tankless water heater.

Other Types Of Tank Water Heaters

There are several types of water heaters and source styles below you can see just a few of the major types available currently the most popular options to buy when it come to tank water heater options. While a number of homeowners have switched to tankless water heaters to save on energy bills and storage space, there are certain benefits to tankless water heaters VS. Traditional tank-based models. In picking a new water heater, you might be trying to choose between traditional and tankless water heaters, and of course, its your choice to pick which one best suits your needs. This is to give you a quick over view on other options available so if you think a tankless is not suitable for your needs then there are other options available.

How do Tankless Water Heaters work?

Tankless water heating systems heat your water supply without tank units in the basement or garage. Water is heated directly without the storage tank and allows cold water to travel through the water source into the unit. Gas or electric burners will heat the water, delivering a constant supply of hot water. You’ll get hot water at a rate of 2 to 5 gallons per minute, with gas-fired tankless heaters providing greater rates of flow than electric. Because of this, they stay clear of the standby warmth losses related to storing water heaters. Only when you need hot water the unit will heat the water, cold water then flows via a pipe right into the system as shown in below image.

tankless water heaters
Traditionally with tank water heaters an element heats the amount of water you need. With tankless gas-fired water heater gas burners inside the heater tanks heats up the water. Because of this, tankless water heating systems deliver a continuous source of hot water when you need it and its done automatically. You do not need to fill your tank adequately with boiling water.

In general, Tankless water heaters generally provide boiling water at an easy rate approx of 2.2 to 6 gallons  or 7.6 too 15.2 liters per min. Generally, gas-fired water heating systems will generate much higher flow than electrical tankless water heaters. Usually smaller sized tankless water heating units, can not easily provide sufficient hot water for multiple and various uses of in big houses.

As an example, showering and also operating the dishwasher simultaneously can easily take an electric or gas tankless heater to the limit and reducing its flow of water. To solve this issue, you could mount an “entire residence” style tankless heater or even install 2 or more heater systems, hooked up parallel for concurrent needs of boiling water. Additionally install different tankless water heating systems for each home appliance for example one for your clothes washing machine and dishwater this way you use one unit for both of your main appliances to reduce load on other parts of the home.

Does your home use less than 41 gallons of water daily? then tankless water heaters can save you up to 34% more energy than your conventional storage thank water heaters. If your home is using about 80 gallons of water per day then you can save from 9-15 percent in energy. You can save even more  energy if you install tankless water heater points at each hot water outlet and increase your savings by an additional 26-50 percent in energy !

How To: Select A Tankless Water Heater

Buying a tankless water heater is a huge investment and there are a few points to consider before you purchase, below is a short list to think about before you buy we then reveal the best tankless water heaters on the current market.

  • Type of Fuel
  • Location, Size and Location
  • Application or Final End Use

Fuel Type
The main thing to consider before you buy a tankless water heater is the type of fuel you need to decide between a Gas-fired or an Electric option. The most popular brands are Stiebel Eltron and Eemax they have great electric water heaters Rheem on the other hand have great Gas-fired tankless water heaters.

Electric Tankless Water Heater Fuel Type
Planning on buying an Electric water heater you need to carefully consider cretin points before you start on purchasing one . One of the main points to consider before you buy is the electrical requirement that they need and consume, below is a short list with detailed information to help you along the way!

  • Voltage
  • Circuit Breaker
  • Amperage

Most retailers are selling units ranging from 110V, 120V, 208V, 220V, 240V, and 277V.
Circuit Breaker
It is advisable that your electric water heater has its dependent circuit there are many reason for this and the main reason is safety! please consult with a licensed electrician for help and information!
The main point here to understand is that you must be able to support the demand of your electric tankless water heater needs in amperage as each electrical unit will have different requirements in amp draw.
Gas Tankless Water Heater
If you prefer to buy natural gas tankless water heater you will need to consider venting requirements this is law and for your own health. Before you start deciding on a brand you need to inspect your type of gas, is it Natural Gas or Propane? This is absolutely essential and you must ensure that you meet the standards of the new gas-fired thankless water heater. Venting is a requirement and all gas venting accessories must be Category III stainless steel (certified with UL1738 ) any other type like type B is non acceptable.
Currently most of the popular tankless water heater manufactures have gas venting kits and it is advisable to purchase the recommended accessories with the brand you decide to purchase with on the down side, the pre-made kits will probably not meet your house needs.  Measure out your vent and the route it will take and think about where the pipe will exit out throw the nearest wall or ceiling consider all these necessary clearances. You must also consider access for air circulation then purchase venting pipes. Also note that gas-fired tankless water heaters will still required electrical connections be sure to consider this into your plan.

What Features Do You Need, On demand Water Heater

Location, Demand and Size
So its time to decide to buy a tankless water heater you need to think about where you will be needing hot water. Do you need hot water just in one bathroom or just on the bathroom sink? Are you looking for an entire house or apartment that needs a full water heater system. This is very important to understand the amount of fixtures needed or outlet sources where you intend to have hot water. Every fixture will need its own demand of supply. Below you can see an image with the standard flow rate demand for some of the most common fixtures.

Flow Rate Gallon Per Minute

Tankless water heaters generate a level of water temperature based on the base flow rate of its demand this is why you need to understand how to use this table, lets look over an example.
A large unit like a Stiebel Eltron Tempra-36, has a voltage of 240 can increase the water temp to 90°F at 1.5 gpm, 90°F at 2.25 gpm, and 80°F at 3.0 gpm with a maximum of 125°F
But with a Stiebel Eltron Tempra 12, that runs on a 240 volts can raise your water temp from 50°F at 1.5 gpm, 30°F at 2.25 gpm, and 25°F at 3.0 gpm with a maximum of 125°F

If you use a shower (1.5gmp ) and also a kitchen sink ( 1.5gmp )at the same time you will have a demand of 3.0 gpm, Stiebel Eltron Tempra 12 can increase your temperature up-to 27°F, but on the other hand a 36Stiebel Eltron Tempra can increase the temp up to 82°F.

Application or Final end use
Below are a few examples of different models of tankless water heaters and their main functionality based on where you will be using them within your house/apartment.

Electric point
Used for only a single application like one sink or one fixture that needs hot water. Here are a few models that you can consider to buy if this is what you need.
Eemax Single Point Electric Tankless
Stiebel Eltron Point of Use Electric Tankless
Chronomite Instant-Flow SR Electric Tankless

Eemax Flow Controlled
Water heaters are best suited to serve two points, like a bath tub and a sink that are close to each other.
Eemax Flow Controlled Electric Tankless Water Heaters Amazon Link

Thermostatic Tankless Water Heater
Usually are great boosters for loss of temperature from long pipes within the house. For accurate temp control like in hospitals or schools you can use thermostat units.
Eemax Thermostatic Electric Tankless Water Heaters
Stiebel Eltron DHC-E 8
Stiebel Eltron DHC-E 10

Eemax Series Two
These units are ideal for smaller houses, apartments, condos,  summer cabins, residential showers and entire bathrooms.
Eemax Series Two

For Indoor House Use
Larger units are designed for the entire house, apartment, condo, where multiple points of use will be in use.
Eemax EX280T2T Series Three
Stiebel Eltron Tempra Series

Outdoor House Use
Are designed to serve an entire house,  condo, apartment or cabin, where multiple points of use will be in use.
Rheem Outdoor Gas-Fired Tankless Water Heaters

Tank Water Heater Vs. Tankless Water Heater

tankless vs tank

tankless vs. tank

Popular Tankless Water Heater Manufacturers

  • Stiebel Eltron
  • Rheem
  • Eemax
  • Chronomite
  • Bosch
  • Rinnai
  • Navien
  • Lowes
  • Titan
  • Noritz

Tankless Water Heater Reviews
Below Is a list of the most popular units, we have done a short review on each item with the benefits and negatives of each system. If you are looking to buy we have also included a link to the cheapest place to buy if you’re looking for the top 10 recommended water heaters then you will need to at our top 10 best list.

On Demand Water Heater Benefits and Advantages

There are actually a lot of advantages when you invest in buying a tankless heater over a tank water heater system but below are the positive advantages that we believe are actually the most significant in aiding you make an informed opinion.

before and after

Endless Supply of Hot Boiling water
Easily the very best reason to have a tankless water heater is actually for the endless supply of water that it provides. If you have actually ever before lacked boiling water throughout a shower, then you will certainly recognize why this is actually very crucial. Typically tankless style water heaters delivers the unlimited amount of hot water for you as the water can continuously compete so long as that it is actually needed. In a house that uses a lot of hot water this will definitely keep the whole family happy when taking showers, one after another, without waiting for water to fill up.

Save over 40% more Money as well as Energy
Tankless water heaters are a lot more energy-efficient in comparison to regular tank water heaters. Installing one in your house could lead to a reduction in your electricity bill straightaway, which then generally causes less money you need to spend monthly on your monthly bills. Tankless water heaters can be a more expensive beforehand financially, yet throughout its daily life, the electricity cost savings should pay you back in the extra money saved and also much more as they cost less to maintain and repair.

Space Saving Smaller units
If you are purchasing an electric tankless water heater then you will save a great deal of additional space. Electric heaters are actually generally a 4th of the measurements of a storage tank water heater. If the heater finds yourself in an interior wardrobe, that area can easily be used as additional storage the same goes for garage space imagine the space-saving you will have.

Much less Decay and Rust
One more advantage of tankless are actually that this is much less likely for decay and water contamination of rust. Given that the water is actually certainly not kept in the storage tank this possesses a lot less chance to rust and also contaminate the water system. Investing in a good tankless water heater, generally is going to spare you the hassle of maintaining and replacing your tankless water heaters because of rust.


Video credits to The Twin Home Experts – LA & Surrounding Area

See Also

Tankless water Heater Installation and Maintenance
Water Heater Leaks and repairs

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