You may be looking for a new hot water tank or moving into a new property and considering your options. Whatever your reason, choosing to go to a tankless water heater system can be a great choice for your home. There are some real benefits to choosing this option over more traditional systems and we\u2019ve put together an overview of tankless water heaters, what to consider when buying one and reviewing the top 10 on the market right now. Our Top Picks Best Tankless Heaters of 2020 Tankless Heaters that are worth mentioning: Our top 10 tankless water heaters We\u2019ve put together a list of the 10 best tankless water heaters on the market right now, including both gas and electric options. 1. Rinnai RUR98iN Ultra Series Condensing Indoor Natural Gas Tankless We start off our list with probably one of the best gas tankless water heaters that you can get for your home. With an energy efficiency factor of 96% and a flow rate of 9.8 GPM, it is a powerhouse of a water heater. It has some added features that really help this stand out, including freeze protection for temperatures as low as -4 degrees Fahrenheit for indoor models like this one. Furthermore, it has a wifi feature that allows the homeowner to check and change settings whenever they are connected. You will not be disappointed by this model but do bear in mind that it is one of the most expensive on the market. So if you have a small home or budget constraints, you may wish to look at alternatives. 2. Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Concentric\/Twin Pipe Installation Another on our list from Rinnai, one of the leading manufacturers of gas-powered tankless water heaters. Once more, they have delivered on both efficiency and power, with this unit providing a flow rate of 9.8 GPM and efficiency factor of 96%. This model really stands out in its ability to provide unlimited amounts of hot water to your home, with a temperature increase of 50 degrees Fahrenheit. This means that even in colder temperatures, you will still get a supply of hot water to faucets and the shower. It is important to note that we recommend you get some professional assistance with the installation of this model, due to it needing to be connected to a natural gas supply. Once set up, it can take up to 20 seconds to heat the water up, but then you will be enjoying the hot water and reduced energy bills. 3. Stiebel Eltron Tempra Plus 24 kW, Tankless Electric Water Heater The first electric tankless water heater on our list comes from Stiebel Eltron and this model doesn\u2019t disappoint. A small, lightweight unit that provides a strong flow rate of 4.0 GPM and will heat up your water to impressive levels. What really makes this model stand out is just how easy it is to install in your home, being small enough to fit under a sink or in a small closet. It has a simple digital control panel to help check settings and make changes when you need and utilises solar power to help run efficiently. However, if you want to power an entire household, then you will need to consider buying multiple units. 4. EcoSmart ECO 27 Electric Tankless Water Heater 27 KW at 240 Volts We love when systems work efficiently and this one lives up to its manufacturer\u2019s name of EcoSmart. For those wanting a straight forward, small electric tankless water heater for a kitchen or bathroom, then look no further. With a maximum flow rate of 3GPM, it can even work with very cold incoming water, boosting the water temperature by 50 degrees Fahrenheit, at a lower flow rate of 1.5 GPM. We appreciate this isn\u2019t near the speed of the larger gas units, but for a single faucet, it is one of the most efficient units there is. Despite it being on the small size when compared to some other models, it is larger than you\u2019d expect, so you will need to think about what space you have before making the purchase. 5. Rheem RTGH-95XLN Prestige Natural Gas Outdoor Tankless Water Heater This is one of the outdoor gas tankless water heaters to make it onto our list and from the outset, we want to say how impressive this model is. It has a flow rate of 9.5GPM, energy efficiency factor of 94% and can actually be connected to other units if you want to increase the overall water heating system in your house. Rheem has used high-quality, stainless-steel to protect it from the elements and with no ventilation required, you can get set up relatively easily and it will meet the needs of the majority of households. 6. Rheem RTG-84XLN Outdoor Tankless Natural Gas Water Heater The second of the Rheem outdoor gas tankless water heaters on our list now and this model is definitely a great choice for any household. This is a more budget-friendly unit but still boasts some impressive statistics, with a flow rate of 8.4 GPM and an energy efficiency rating of 84%. This means it will do a good job for most households, except perhaps for some much larger or high usage properties. It\u2019s low emissions and performance will mean you will be reducing your carbon footprint whilst also saving money, a combination we love! They\u2019ve even thrown in a remote control system that means you can change settings without having to go outside. 7. Takagi T-KJr2-IN-NG Indoor Natural Gas Tankless Water Heater This gas tankless water heater is one of the more affordable models on our list, that still packs a punch in terms of quality and performance. With a flow rate of 6.6 GPM and an energy efficiency factor of around 83%, you know it will do the job for most normal sized households. For people on a budget and with limited space, this is a great fit as it is one of the smallest gas systems available right now. You will get an impressive 10-year manufacturers warranty with this model and it is very easy to maintain, should you need to make any repairs or replace parts. However, it is important to note it isn\u2019t as efficient or powerful as other models, so you may need to consider an alternative if you have a larger or busier household. 8. Rheem 95DVLN Indoor Direct Vent Tankless Water Heater Another tankless water heater from Rheem now but this one is their indoor model. One of the first things you will notice about this model is its fantastic flow rate of 9.5 GPM, one of the best rates you will see right now The manufacturers have put in a low NOx system which means it doesn\u2019t need the traditional heavy-duty venting systems. It can be installed pretty much anywhere and basic PVC venting will do the job, reducing complication and costs significantly. An efficient unit that does use a fair amount of power but thanks to this efficiency, you don\u2019t need to worry. Do bear in mind that when the water comes into the house at a much colder temperature, it can take a few moments for this system to heat the water up 9. Takagi T-H3-DV-N Tankless Water Heater The most powerful unit to make it onto our list, with a flow rate of 10 GPM. This tankless water heater from Takagi really does deliver the goods. What is interesting about this model is that it works by condensing steam that is produced, which turns it into water which can be drained out. This means you can safely operate this gas heater indoors and doesn\u2019t require heavy-duty ventilation. You will be pleased to know it has an array of safety features built-in, with its computer system protecting you from leaks and malfunctions. 10. Eccotemp L10 2.6 GPM Portable Tankless Water Heater The last product on our list is by no means the least and where it stands out is this model is portable. So if you\u2019re camping or staying in a remote cabin, then this will allow you to have a nice warm shower or hot water whenever you need it. It has an impressive flow rate for a portable unit, of 2.65 GPM and runs of propane which are easy to obtain. It has a useful battery ignition system that stops any overheating from occurring, adding to its safety features. You will use a 20lb propane tank and the standard gas lines to get set up and you will be able to enjoy hot water, even heating up water that is below freezing. Summary We hope you have found our article on the best tankless water heaters helpful and it has provided the information you need to make an informed decision. This type of water heater is a fantastic choice for those wanting on-demand hot water or those with minimal space in their property. Product Overview Put simply, a tankless water heater will provide your home with an instant and on-demand supply of hot water. This is the primary difference with traditional hot water tanks, that keep a certain amount in the tank ready to use. You may be worried about the energy usage of these on-demand systems but because they only use energy when you use the hot water, such as switching on a faucet or the shower, they are energy efficient. Research has shown that you can save up to 37% on your energy bills. Types of tankless water heater When considering a tankless water heater system, you must first consider whether it is an indoors or outdoors model. No matter which type you go for, you have two choices about which energy source they draw from, electric or gas. Electric Important issues to consider Making the decision to purchase a tankless water heater isn\u2019t a simple one and there are some important questions to ask yourself, prior to making your purchase. Capacity There are many tankless water heaters to choose from and you need to understand the capacity you require and find one that fits your needs, otherwise, you will end up not having enough hot water when you need it. You will find tables of average usage for the different rooms and faucets in your home, which will help you calculate the overall flow rate required. Indoor Vs Outdoor You can purchase a tankless water heater that is fitted either indoors, or outdoors. This will depend on the space you have in your home, the potential sound they make and whether this will cause irritation. Finally, consider ventilation requirements, as the gas models will often require ventilation and that will define where you will be able to install it. Water quality The performance of a tankless water heater will be affected by the quality of your water supply, in particular the temperature and hardness. If the water is below 50 degrees then you should go for a gas-powered system. If the water is very hard, you may need additional equipment to help with softening the water.