Best Tankless Water Heaters & Brands Reviews

Hot water is an essential part of daily life for people who are living in certain area. Unfortunately, maintaining a heating unit for your water can be quite costly.

Not to mention that such unit tends to consume high amount of energy. Some people will recommend you to get one furnace without tank because it is considered to be far better when it comes to energy use and monetary expenses. You will get to know some of the best tankless water heaters that can be found in the market today. The information contained in this article includes tips to get a suitable heat unit.

What is Tankless Water Heater?

This unit is also known as continuous flow or inline heat furnace. Unlike the standard model that has tank where the water goes in, the furnace only heats water on demand. When you are turning on the tap for heating mode, a sensor will detect water that approaches the unit. This sensor will activate burner that is going to heat up the water within seconds. The temperature is adjusted according to the tap setting. It is a great alternative to the conventional heater especially in terms of energy efficiency because the unit does not have to be turned on at all time.

The Thing Considerations before Buy Tankless Water Heater

Are you thinking about purchasing a tank-less furnace for your plumbing system? Surely, this unit has plenty of advantages, particularly from energy and economical perspectives. Still, there are several things that you need to consider before purchasing one model. Let’s get through each point in detail.

Higher System Price

The inline furnace is going to be more expensive if compared to the conventional model. It is understandable, since the unit is equipped with sophisticated features such as flow sensor. The price for system without tank can be twice or even four times of the tanked unit, depending on the output. However, you will be able to save up money in the long run due to less spending in energy.

Electric or Gas Fuel?

Before purchasing your unit, you should also consider whether you will be getting the electric or gas fueled one. The gas fueled system has longer life span which is more than 20 years. Meanwhile, the electric model will be able to cater you for about 10 years. Unfortunately, the installation for gas system is more complicated than if you are choosing the electric one.

Requiring Professional Installation

Professional installation is a definite must when it comes to this furnace installation. You must contact experienced and licensed plumber in your area to have the professional installing your heater. However, as expected, you will be facing significantly higher installation price compared to the tanked system. It is because the process of setting up the unit is far more complicated than a conventional one.


Is your house ready for the installation of this system? You might be required to do retrofitting or adding new component to your house’s plumbing system in order to accommodate the heating furnace. You might need to upgrade your pipes, lines, and gas meter to ensure that. This step will require hefty amount of money, depending on how many upgrades you need to do.

Top 6 Best Tankless Water Heaters Reviews

Many heating furnaces available in the market, but some products are definitely better than the rest. Here are some great system options for you.

1. Stiebel Eltron Tempra Plus 36kW

This German-made model is equipped with various features that make it a leading product. It is an electric fueled unit which requires 36kW wattage to run. This unit is capable of producing hot water with temperature ranging from 86ºF to 104ºF. The system promises efficiency in energy up to 99% especially since it has technology that allows for automatic modulation to reduce the amount of energy used. It also has sophisticated flow control so that the temperature of your water will be maintained at steady rate. You will not have to deal with sudden spike of cold or hot water.

That flow control mechanism also manages the flow output so that if the temperature requested goes over its current capacity, the output will be reduced slightly. People love this model because it does not emit any noise when operating, unlike many other products. The size of this system is also small so you will be able to accommodate it easily, even in tight space. User can navigate through the system easily since the unit comes with a digital display. In order to install this unit, your electric service should be at least 300A. Meanwhile, the voltage required is around 240V.

2. Bosch Tronic 3000

The modern looking unit is certainly one of the most reliable one in the market. It is not completely tank-less, as the system comes with small tank with three varying size options (2.5, 4, and 7 gallons). Despite the tank, you can definitely still fit it in various places of your house such as lower side of your bathroom sink or kitchen cabinet. The weight for the 7-gallon model is 29.5 pounds. This unit runs with electric current and you need about 1440W to ensure its operation. Although the size is compact, it can yield a wide range of water temperature, from 65ºF to 145ºC.

You can utilize the tank for varied form of configuration. It can be a main heating system for one sink or supporting unit for your primary heat unit. Either way, the technology that is used in this furnace will be able to shorten the time of waiting for hot water to come out. It promises efficiency of heating energy up to 98%. If you are going to install this unit, you have to make sure that your electric service is at least 12A and 120V. That is an easy requirement to meet as most houses will likely fulfill it.

3. Rinnai RUC98iN

When it comes to design, you cannot deny that this hot water system comes up with one of the most tantalizing ones. This particular unit requires gas for its running. The requirement for gas input for its operation ranging from 15,200 to 199,000 BTU per hour depending on the temperature setup. This gas system is supported by electrical ignition. Due to this, you can get hot water without having to wait for a long period. The control panel for temperature is also run by electric charge. For residential installation, the temperature output of this heat unit goes from 98ºF to 140ºF.

Homeowner has two gas options to fuel this unit, natural and propane. It is important to purchase the right model according to your choice because each model is specifically designed for certain gas fuel. The product is already certified in Energy Star due to its energy efficiency features. It promises to have efficiency in thermal energy up to 95% due to technology called condensing. It also has extremely low emissions of NOx which is a plus point. Since the dimension is quite compact, you can install it in small space. It can even be installed in places such as mobile homes.

4. Takagi T-KJr2-IN-LP

The unit is designed specifically for indoor installation. With its compact size (13.8 x 6.7 x 20.3 inches) and light weight (38 pounds), the KJr2 is a perfect system for those who are living in small residents. Despite the size, it is still a fully functional unit; a great one at that too. The unit is run with gas. You can opt to use natural gas or liquid propane to fuel its operation. The requirement is about 19,500 to 140,000 depending on your need. For the ignition, it needs electrical current around 115V. Because of that, the waiting time for hot water is quite short.

Another great thing about this unit is its comprehensive safety features. It is equipped with a fuse that will cut off connection with the valve when system gets overheated. Thermostats inside and outside the unit also monitor temperature in order to make sure that it does not go overboard. The unit is also packed with sensor for flame. This product is also declared to be lead free. It has received Energy Star certification for its energy saving features. This unit also promises to have very low emission of NOx. The 15 years limited warranty is also a great feature.

5. Rheem RTGH-95DVLN

You will find yourself in awe after finding out about this particular unit. People will opt for this heating water unit if they want something reliable and long lasting. First, the size of this unit is so compact (9.8 x 18.5 x 27.5 inches) that you can fit it easily in your bathroom. It is equipped with variety of technology that supports its efficiency whilst still ensuring that user gets the ultimate comfort. Hot temperature condensing exchanger made of stainless steel is able to reduce energy usage up to 94%. This gas fueled unit is also equipped with smart control panel that further spikes up the efficiency while making sure that user is safe.

The installation process for this unit is very easy. Because of that, you will not need to wait for a long time to use this heater immediately in your house. When you are purchasing this unit, you will also get a remote control that can help user controlling temperature in more precise manner. For safety, this unit also has freeze protection that can detect cold temperature up to -30ºF. You can install this Rheem product even in a place of high altitude. Homeowner can opt for unit with liquid propane fuel or the natural gas one.

6. Rinnai RUC98iP

The box shaped furnace is designed to fit any indoor space, from small to a large one. The size is quite compact: 26 x 18.5 x 10 inches. Whether you are installing it in your kitchen or bathroom, the sleek looking unit will not look too conspicuous. This unit is fueled with liquid propane, although the ignition is definitely utilizing electric charge (it requires about 120V). Liquid propane is quite affordable if compared to paying electricity. The maximum gas rate input that it requires is 199,000 BTU which for daily usage is rarely achieved. You do not need to purchase liquid propane tank continuously.

The maximum rate of water flows when using this unit is about 5GPM. The water furnace system is certified as Energy Star product due to its energy saving features. It can save up 96% energy if compared to conventional heater with tank that is widely used. In addition to that, the NOx emission of this unit is very low. During installation, you can opt between twin PVC pipe or concentric depending on your budget and house’s system. If you purchase it for residential use, you will get 12 years limited warranty (for hot temperature exchanger). That is a nice feature.

Things to Consider before Installing Tankless Water Heater at Home

Installing tankless water heater is not something to be taken for granted. Consider these factors before having any installation process done.

There are a lot of things to consider before installing tankless water heater. Having hot water constantly available is a privilege, and that is why people are buying water heater these days. Before completing your house with a tankless water heater, what factors that you need to understand?

The Important Things to Know about Installing Water Heater

In order to make sure you choose the perfect machinery of water heating, these are several factors you need to understand before buying tankless type of machine. They will help you decide whether or not to get the device at home.

1. The Cost

The first thing to consider is cost. Tankless water heater will generally make you spend more money at the beginning. Why so? It is because the initial cost for the machine is quite expensive. It will cost $700 to $1,200 depending on what power source you want for the machine. If you do not have large budget at first, it is better to ditch the idea of using tankless heater.

2. The Space

The space is very easy factor. Whether you have large house with vast yard or just smaller house, the tankless heater can be installed easily. It does not need large space to install the tank as it does not have any. Thus, it is installable on tight space, like in the attic and behind the wall.

3. The Maintenance

For the maintenance, if you are too lazy for checkups, you will be delighted to choose the tankless type. It only needs an annual checkup instead of a couple times a year, unlike the traditional device.

4. The Usage

In addition, the usage of tankless heater is at-time. It means you will need to have it works to heat up the water right before using the water. If you need hot water at once every morning, this heating machine is not suitable.

You will be more pleased with the water heater that has tank to store previously-heated water there. However, with all the space to take up when there is a water tank, the tankless heater seems to be more comfortable and simpler one, still.

Besides all those factors above, of course there are more to consider before installing tankless water heater. However, based on what it offers, it seems the tankless type of water heating machine is good enough and perfect for any household these days.

Pros and Cons Tankless Water Heater to Understand Before Buying

Planning to buy a tankless water heater in the near future? You will need to understand the pros and cons tankless water heater first. Now, let’s check them down below.

The pros and cons tankless water heater should be understood by everyone planning to use this kind of machinery at home. The traditional heater with huge tank is not in trend anymore. The new trend is the one using heater with tankless mode.

Before getting tempted by the tankless water heater, make sure you do understand about its pros and cons. Well, here is the full information about it that will convince you more about the machine.

Pros: Save More Energy

The first pro side here is that the tankless machine saves more energy. It does not use any tank to store the previously-heated water. It means the machine will be only turned on when in needs. In average, the machine saves around $116 per year compared to the traditional heater.

Pros: Takes up Less Space

Without the tank, the machine can be installed literally anywhere. It does not have to require large and vast space for the location. You can install this machine behind a wall, in garage, in the attic, even in the basement or in utility room at home.

Pros: Longer Lifespan

The traditional water heating machine with tank will last for 10 years in average. After that, the tank and machine need to be replaced, especially the tank as it can be moldy already in the inside. The tankless mode does not need any replacement for 2 decades or more.

Cons: Slower to Get the Hot Water

Tankless water heater does not have any space to store previously-heated water. If you want hot water, the machine will heat it up first. It may take longer for you to have the access to get hot water.

Cons: More Expensive

The cost for tankless heater is way more expensive than the traditional one. In average, to buy electric tankless heater, you will need $700, and to buy gas tankless heater, it will cost around $1,200.

Now that you know there are a lot of good things about the machine, you can make sure the water heater without the tank is going to be the one to choose. It will provide more convenient usage. Even though there are some downsides of the machinery, the information of pros and cons tankless water heater above should tell you that, in overall, the tankless heater is worth the money.


In the era where energy efficiency is highly valued, it becomes an important parameter when you are buying any type of household appliances and furniture. Choosing something efficient does not only have positive impact to the environment. You also save yourself a lot of money in the long run. That is why knowing some of the best tankless water heaters should be your priority. Many people cannot live without this important appliance. However, the traditional heating system tends to be wasteful. It is time for you to change for the better, for the sake of environment and your financial state.