Best Tankless Water Heater – Reviews & Comprehensive Buying Guide

Nothing works better than a hot shower after a long stressful day at work! The warm jet of water running down the back soothing the aching muscles, washing away the fatigue of the day. Sure sounds heavenly right? Water heaters are no longer confined to homes in the colder climatic zones they have now become a modern luxury, an indispensable part of our lives. But an ordinary water heater has its fair share of flaws such as inefficiency, limited storage capacity and high power requirement that discourage people from using it too often. Thanks to the tankless water heaters, you get a steady supply of hot water all day long.

Best Tankless Water Heater - Our Picks

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The Best Water Heaters in the Market

Now that you know all about tankless water heaters and how it scores over an ordinary storage water heating system, it is time we venture out into the many brands and types of water heaters out there. There are so many brands and companies that manufacture tankless water heaters! It can be overwhelming to look into all the features of every product before deciding what to buy. Don’t worry, I have complied here a list of the top 7 tankless water heaters complete with their features and technical specifications that would help you make a decision.

What are We Looking for?

Before we move on to discuss the top brands in the water heater market, it is only fair that you get a glimpse of the criterion according to which we will be rating the products mentioned below. Listed below is a checklist of sorts containing the primary features of a tankless water heating system:

  • The size, type, built and overall design
  • Energy efficiency
  • Heating capacity
  • Installation and maintenance
  • Security features
  • The cost

StiebelEltron Tempra 24 Plus Electric Water Heater

Editor Rating:

Very similar to its predecessor, the Tempra 20 plus model, the StiebelEltron 24 plus water heater comes with a few extra perks. The extensive heating capacity can easily supply water to the entire household, while the high flow and pressure balance technology offers greater range of control. The sleek compact design looks good everywhere, and doesn’t require venting, also it saves up to 15-20% of power!

  • Product weight: 15.4 pounds
  • Product dimensions: 21.5 x 19.5 x 8.8 inches
  • Warranty: 3 year limited warranty

Rheem RTG-95XLN Tankless Water Heater

Editor Rating:

The Rheem RTG-95XLN model offers a 6.4 gallon per minute water supply when inclined at 35 degrees and is perfect for outdoor installations. Consult a professional or hire the company technicians to install this gas heater, also ensure that it doesn’t tamper with the gas lines of the house. You can get a wider temperature range and steady framework that ensures a consistent water supply.

  • Product weight: 54 pounds
  • Product dimensions: 14 x 10 x 26 inches
  • A 120 volts AC plug or hard wired power source

EcoSmart ECO 27 Electric Tankless Water Heater

Editor Rating:

A better and smarter alternative to the older ECO 18 model, the EcoSmart ECO 20 offers a larger heating capacity and flow rate. The copper and stainless steel framework is strong and aesthetically pleasing. Also the 6 galleon per minute water supply rate is enough to meet the needs of the entire household without compromising on the temperature or flow of water. 

It can heat up to a maximum of 140 degrees, more than what most tankless water heating systems can offer, thus saving up to 50% of your electric bill.

  • Product weight: 16.8 pounds
  • Product dimensions: 17 x 17 x 3.8 inches
  • Warranty: lifetime warranty

Rinnai RU98IN Indoor Condensing Tankless Natural Gas Water Heater

Editor Rating:

The best thing about the RU98IN model by Rinnai is its extensive water flow (9.8 gallons per minute!), you can connect as many outlets you want. Also the 96% thermal efficiency and digitally controlled regulators save a lot of power. And the heavy duty brass framework only adds to its sturdiness, it comes with a 12 year warranty on heat exchange, and 5 years for other parts. 

It is best that you install this condensing heater near a floor drain to ensure proper venting.

  • Product weight: 70.9 pounds
  • Product dimensions: 18.5 x 10.1 x 26.4 inches
  • Indoor wall mounting installation water heater

Ecotemp 45HI-LP Horizontal Bundle Tankless Water Heater

Editor Rating:

Considered to be among the largest water heaters launched by EcoTemp, the 45HP-LP Bundle model is still relatively compact and easy to install. The 140000 BTU capacity and 6.8 gallons per minute water flow makes it an efficient water heater for both personal and commercial use. 

It runs on propane and doesn’t require electricity, also the system can easily adjust to the varying supply needs without affecting the temperature.

  • Product weight: 38 lbs
  • Product dimensions: 15 x 5 x 24 inches
  • Warranty: 10 year warranty on heat exchanger, 5 year warranty on parts

Tagaki Indoor Gas Tankless, Natural Gas Water Heater

Editor Rating:

Owing to its low heat capacity the Tagaki Indoor Gas Tankless Water Heater is ideal for small household and nuclear families. With a whooping water supply rate of 6.6 gallon per minute and a standard heavy duty 110 volt electric motor, this compact tankless gas water heater can easily fit in your bathroom. You can install it by yourself or get a professional technician.

  • Product dimensions: 6.7 x 13.8 x 20.3 inches
  • Product weight: 37 pounds
  • Warranty: 10 year on heat exchanger and 5 years on the other parts (only if it is installed by a Takagi technician)

Rinnai RL75IN Natural Gas Tankless Water Heater

Editor Rating:

With a high 7.5 gallons per minute water flow, and a maximum heating capacity of 140 degrees, the RL75IN model is perfect for large apartments and big families. It comes with a 12 year warranty on the overall framework and 5 years on separate parts The flexible design allows you to install in almost anywhere at both horizontal and vertical angles.

(i.e. can be installed on both the wall and the floor) the 120 volt electric power source comes with a MC-91-1 digital interface for enhanced temperature regulation.

  • Product weight:50 pounds
  • Product dimensions: 14 x 23 x 9.3 inches
  • 10300-180000 BTU capacity and a thermal efficiency of 82%

Bosch 330 PN LP Propane Thermal Tankless Water Heater

Editor Rating:

The 78% plus thermal efficiency and a maximum BTU or input of 75000 makes Bosch 330 PN LP a competent thermal water heater best suited for small households. Also the 3.3 gallons per minute water flow temperature range of 35 degrees comes with a Piezo ignition technology that doesn’t need electricity or batteries. 

The sturdy framework can be easily fixed on a wall and provides a steady temperature irrespective of the flow of water.

  • Product weight: 24.6 pounds
  • Product dimension: 10.5 x 18.5 x 36.8 inches
  • Warranty: 3- 15 years as per the application

The deal with tankless water heaters

Gone are the days when you’d have to wait for hours for just a bucket of hot water, a tankless water heating system ensures that you never run out of hot water when showering! The tankless water heaters (or demand type instantaneous water heaters) use innovative heating technology that ensures speed and efficiency. These high powered water heaters don’t retain water internally, the built in flow sensors trigger the heaters whenever water passes through them. The heating mechanism usually uses gas or electricity as a power source, and the insulated covering adds on to the durability and steadiness of the machine.

What’s great about tankless water heaters?

Tired of spending a fortune on water heaters that almost always runs out of hot water whenever there’s an extra guest in the house? Yes, we’ve all been there, and it’s not a very pleasant situation! All hail the tankless water heaters that supplies hot water whenever you want! Also the ergonomic design and compact framework perfectly complements your bathroom saving a lot on space. Discussed below are some other perks offered by tankless water heaters, and how they are so much better than the conventional heaters out there,

Comfort and Convenience

Among the most innovative water heating equipment in the market, tankless water heaters are the epitome of comfort and convenience. With just the push of a button you get an easy and continuous supply of hot water! Now you don’t have to schedule bathing times for the family anymore, thanks to its revolutionary technology and heavy duty design, the water heats up quickly. Also there is no risk of sudden fluctuations in temperature. Even the compact designs are an added perk, you can mount it on the walls, or place it in a corner unlike the huge traditional water heaters that take over half the space in your bathrooms.

Toughness and Durability

The heavy duty construction and the all metallic framework make tankless water heaters a tougher alternative to the conventional heaters. Also tankless water heaters last longer- once you’ve installed a tankless water heating system you don’t have to worry about it for minimum 10 years (that’s almost double of what other ordinary heaters offer!) The absence of a tank and electronic heating system adds on to its efficiency. Most tankless water heaters are made of parts that can be easily dismantled, repaired or replaced adding on to its life.

Less Power Consumption

The tankless water heaters work mainly on gas or electricity, this considerably reduces the power consumption (not to mention the major reduction on the electricity bill!). And though the gas fired tankless water heaters are faster and more efficient than the electric powered ones, one cannot deny the fact that tankless water heaters on the whole is a more power efficient and time saving alternative to the ordinary water heaters. Also owing to the fact that it heats up instantly “on demand”, the chances of energy wastage and standby heat losses is far less in a tankless water heater.

Flexibility of Operation

A tankless water heater offers a greater flexibility of operation when compared to other tank water heaters. With the many built in heat settings and controls you can easily regulate the quantity and temperature of water. Also the compact framework and continuous supply of hot water make it a smart option for big households and single room apartments alike. Also tankless water heaters are not just confined to the bathrooms it can be installed outdoors as well you can even use it to boost the kitchen appliances such as dishwasher and washing machines.

Environment friendly

The power saving and ergonomic design of a tankless water heater can normally supply hot water at a rate of 2 to 5 gallons (7.6 to 15.2 litres) per minute. Therefore it is best for families that require a consistent supply of hot water, stats prove the same, scientific studies and surveys have revealed how tankless water heaters save up to 27 to 50% energy and is certified as an environment friendly water heating system. Also because of the tankless design there is no accumulation of dirt or other impurities, you get fresh clean water all day round.

Absolutely Safe

Tankless water heaters are absolutely safe- the insulation covering prevents accidents while the plastic covering protects the heater from depreciation and external damages. There is no danger of gas explosion or short circuits. The electric power supply system is full proof and secure. Also the sturdy heavy duty framework adds on to the overall toughness and durability of the equipment. The easy start up and shut down option further add on to its user friendliness. Tankless water heaters are especially effective if you have kids in your house, the smart sensors cuts the power supply when the machine in not in use, while the tankless design prevents the risk of spillage.

The Bottom Line

An unlimited supply of hot water anytime you want! With its smart design, time and power efficient heating system and other top notch features, tankless or on demand water heaters have now become a rage in the market. Also the brands mentioned above are the top players offering the best quality services. And though you’d have to spend some extra cash while installing the heater, they save a lot on costs in the long run. Durable dependable and effective- these tankless water heating systems are a profitable investment.

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  • Updated October 11, 2016