How to Choose Tankless Water Heater

Technologically advanced tankless water heaters promise energy efficiency and the much needed prospect of saving money in the long term due to their durability.

Although these come with a relatively high initial cost of installation, they are undoubtedly very popular appliances due to their numerous advantages.

As is the case when purchasing any other domestic appliance, a lot of factors have to be put into consideration in order to avoid making purchases that will lead to almost immediate disappointment.

How to Choose Tankless Water Heater For Your Home

1. Consider the energy source you intend to use

You need to consider the type of energy source you intend to use with your heater. Tankless heaters are available for both electricity and gas lines. Despite requiring different energy sources and installation procedures, both gas and electric tankless water heaters use the same basic heating mechanism.

Looking at the energy source that best suites you, whether financially or otherwise therefore, may well be the deciding factor in the type of tankless water heater you end up with.

Purchasing electric heaters require particular attention to specification aspects such as amperage, voltage, and general wiring requirements. In order to keep your initial cost of installation as low as possible, it is advisable to go for a tankless electric water heater that complements, goes well with the wiring already laid out at your place with as little modification as possible.

Installing a gas-powered water heater will also require an extensive knowledge of your home’s gas lines.

It is advisable to hire a qualified professional when carrying out the installation of either type of tankless water heater in your home. Despite their mechanical differences, both the electric and gas-powered water heaters give excellent levels of performance.

2. Consider the type of tankless water heater best suited for your requirements.

There are three different types of tankless water heaters available in the market today. These differences are mainly based on their size and functionality. These types are:

  1. Single point
  2. Multi point
  3. Whole house

The least expensive type here is the single point tankless water heater. This type however, is designed to supply only a single outlet at a time. This means that if you install it for your shower then it won’t be able to supply any other outlet in the house. The installation of additional water heating appliances for other outlets in the house may be necessary.

The multi point tankless water heater on the other hand is designed to supply more than a single outlet with a good amount of heated water. This however, comes at a slightly higher cost of initial installation.

The largest and most expensive option of the three is the whole house tankless water heater. Installing this type may well eliminate the need for any additional water heating appliances in your home. Its large capacity allows it to sufficiently supply all outlets in the home with a steady flow of heated water.

3. Consider the size best suited for your place.

In order to choose the best size for your home, the average flow rate of your existing outlets must be calculated. Your outlets’ flow rate is simply the amount of water that flows out of the outlets in a given time; usually in minutes.

This calculation is however, only useful if your household regularly uses more than one outlet at the same time.

Regular size tankless heaters are able to supply between 5 to 7 gallons of heated water per minute. The water heater you settle for should be able to provide an adequate supply of hot water when the connected outlets are used simultaneously.

On average most water heaters emit heated water with temperatures noticeably high than what is desired. For your safety and comfort therefore, some of them come with controls that enable you to adjust the outlet’s water temperature accordingly. Please note that some models in the market may come without this function. So only go for the one that is in harmony with your needs.

4. Consider other minor brand details.

Popular brands of tankless water heaters currently in the market include Stiebel Eltron, Rinnai, Noritz, and Navien. Rinnai offers a number of tankless water heaters, among them being the luxury series and value series, while Stiebel Eltron on the other hand offers products that are designed with easy-to-use features.

The Navien Company also offers products for a variety of settings such as indoor and outdoor water heating installations and also commercial and residential setups. The Noritz Company supplies various sized tankless models for residential installations. All these companies and any others not mentioned offer varying after sales services.

These may be in the form of technical and warranty support. Look for the brand that will give you as much support as possible with the least possible added cost.

5. Consider the market price.

Their prices vary depending mainly on their sizes and features. Apart from their obvious space-saving advantage over tanked water heaters, tankless heaters are generally more durable and with more long term energy and time efficiency advantages over the tanked varieties. Due to their complex nature and demand, they are generally more expensive compared to the tanked varieties


Finally, calculating the average temperature of the heater you are looking at together with the average water flow of the pipes at your place will go a long way in giving you peace of mind if your main aim is energy efficiency. The market is filled with many products designed with excellent specifications that will match your requirements as closely as possible.

Following the above tips, coupled with the advice of a qualified technician will definitely bring you a step closer to acquiring the perfect tankless water heater.

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