You might love winters or maybe you hate them, in either case, we can all agree that one of the best things about winters is a good hot water bath. Everyone is pretty familiar with water tanks which hold hot water ready to be used—that is now an old method of going about water heating. This is the era of tankless water heaters!
Tankless water heaters have been around for a long time and in the past years, they have been getting more and more traction. With the new and interesting features coming up with advances in technology and an increase in their popularity, tankless water heaters have gained a lot of customers over the previous years.
There are a number of different models of tankless water heaters which have different specifications and offer various features that you can find. It can be a real hassle digging through all the information scattered across the online and offline world to find the one you would want to buy. Although, the question is, which one of them is the best for you and can cater to your needs?
Here have assorted a list of some of the best tankless water heaters in the market to save you your precious time!
Best Tankless Water Heaters Reviews 2021
1. Stiebel Eltron Tankless Water Heater- Tempra 24 Plus
- Dimensions: 16.6 x 14.5 x 4.6″
- 4 pounds
- Maximum flow rate of 5.4 GPM
- This specific model has two flow rates – 240V @ 24KW and 208V @ 18KW.
- Requires a minimum recommended household electric service of 150 A, and offers an output water temperature of 86˚ to 140˚F.
- Energy efficiency 99+%
1. Stiebel Eltron Tankless Water Heater - Tempra 24 Plus
Stiebel Eltron is a German company founded in 1924. They invented the tankless water heating technology more than 90 years ago. It is one of the world’s leading specialists in the manufacture of water source heat pumps. They have provided the best water heating solutions over the years and this product is one of the best products they have manufactured.
Tempra 24 Plus is one of the most powerful tankless water heaters from Stiebel Eltron. It is a high-quality unit which is a great pick for those who live in cold regions where temperatures of water can reach pretty low temperatures.
- Advanced Flow Technology
The Stiebel Eltron Tempra 24 Plus features a brand-exclusive technology which unlike the various tankless units, will automatically regulate the flow rate if its capacity is exceeded. Simply put, it maintains hot water temperature for your constant comfort.
- Compact Body
This heater, due to its sleek design, is perfect for one or two room apartments. It does not require any venting and conserves a lot of space too.
- Intuitive Temperature Display
It consists of a large display that shows you the temperature in an easy-to-read digital format for constant information. Its responsive dial allows you to set the temperature along with temperature memory settings.
If you require a premium tankless water heater, it is the right option for you. This is assuredly one of the best tankless water heater solutions you can find and Stiebel Eltron’s 90+ years of experience can guarantee that. It provides high performance and is recommendable for those who want constant water temperature maintenance.
Rinnai is the best selling tankless water heater brand in North America. They are also supported by professional service providers that can track your usage and efficiency, often swiftly putting an end to the problems before they cause any inconvenience.
The Rinnai V65eN is a model designed for outdoor installation only. It is a natural gas-powered unit that can withstand even severe conditions. This meets California and Texas NOx emission standards. It provides a decent flow rate which can be very convenient when using a single room. The V series is not an energy star compliant, but it will still save on your energy bill over a standard storage tank water heater.
Regarding regular use, the flow rate can still be considered good enough for general needs. Given the size and other specifications, the unit can serve well for a small family of 3-4 people.
- Circ360 Technology
The Rinnai V65eN features the iconic Circ360 Technology. This technology recirculates hot water through the pipe for faster heating so you can get on-demand hot water without any difficulties at all. It reduces water wastage and heats water efficiently.
- Low Emission And Energy Savings
The product’s endless water technology is run by natural gas. This gas executes low NOx and CO2 emission which helps keep the environment cleaner. This uses 40% less energy and conserves water in comparison to the traditional tanks.
- Save Valuable Space
Its small size and compact design allow for easy installation even in unconventional spaces.
Rinnai is a great option if you want the guaranteed performance in hot or cold weather. It also consists of an optional feature of Control-R WiFi capabilities. According to the users, it is convenient to use and easy to install. Rest assured, Rinnai is a more reliable choice in the long haul.
3. Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater
Rheem has become one of the largest water heating manufacturers in the water heating industry in the United States. They produce both tank and tankless water heater products, so they surely do have a very decent amount of experience in working with such units.
Rheem RTEX-13 is one of the best electric water heaters available and provides a great value while being the entire house solution or in point of use application. It allows you to control the temperature with increments of 1°F, giving you complete control. Its compact size allows a lot of flexibility in installation locations.
Like the other electric tankless water heaters, the Rheem RTEX-13 is very energy efficient and can surely help reduce your energy bills. It is very famous among customers for being user-friendly and offering reliable and satisfactory performance.
- Energy Efficient
This electric tankless water heater model is 99.8% energy efficient. The water heater is only really used when the outlet is operating, so you will be saving electricity in the long run.
- Durable Heating Elements
The Rheem RTEX 13 utilizes two copper immersion heating elements. Water travels through the copper heating elements and quickly becomes hot. This allows access to hot water whenever required. These elements are also perfectly durable, giving this tankless water heater a longer life span.
- Adjustable Digital Thermostatic Control
The tankless model features user-friendly controls. The adjustable digital thermostatic control allows the user to change the temperature of the water as required with the increments of 1°F. This is done through an easy-to-use and convenient LED display system.
The Rheem Heating Chamber RTEX-13 is suited for smaller spaces and would not be an ideal option for large households due to its limited flow rate. If you are in a smaller living space, this would be a really good and inexpensive option for you.
Ecosmart is a top-notch brand in the field of tankless water heaters. Its product, ECO 27, holds up its name and delivers amazing performance. It is efficient and small which when combined with its smart features, makes it a great option.
The ECO 27 is extremely efficient and perfect for any home. It is one the largest electric tankless water heaters available with the brand’s patented self-modulating technology. It comes with a WaterSense certification, lifetime warranty on the elements and can be remotely operated.
The unit is ideal for the northern United States where the incoming water temperature can reach very low temperatures. It is capable of handling up to two showers running at the same time and would never run out of hot water.
For homes in the southern United States, the Ecosmart ECO 27 is perfect for a high demand of hot water between multiple uses. In the warmer climates, it can reach water flow of up to 6 GPM, which means you can run four showers and sinks simultaneously.
It has a reasonable price and would be a really good option if you’re on a tight budget. The unit is mainly ideal for small households or cabins.
- Flow Rate
ECO27 is capable of providing a flow rate of 3 GPM in areas with temperatures as long as 37°F. In places where the incoming water has a higher temperature, the flow rate can increase to about 6 GPM. Due to this, it can work with two showers running simultaneously.
- Digital Temperature Control
This unit allows you to control the temperature in 1-degree increments. This enables you to set the exact temperature more precisely based on your needs. Temperatures can be set in from 80°F to 140°F.
All in all, Ecosmart ECO 27 is the best option for those who want to save money and reduce their environmental footprint. It operates really well regardless of the climate and is very easy to use. This tankless electric water heater can be an ideal option for those in small living spaces and cabins.
Eccotemp has been among the leading manufacturers of energy-efficient tankless water heaters and one of the top-sellers of portable tankless water heaters companies in the world. They have been engineering eco-friendly and affordable products since 2004.
In terms of portable tankless water heaters, Eccotemp L10 is of exceptionally great quality. It is the best selling and highly trusted portable tankless water heater.
Eccotemp L10 is great for heating water instantly while camping, in an RV or tiny homes, washing pets, cleaning vehicles, greenhouses or basically anywhere else which requires instant and endless hot water.
- Perfect For Outdoors
The Eccotemp L10 is a reliable outdoor tankless water heater which is perfect for camping, cabins and farms. It is lightweight and compact, making it easier to carry and get on-demand hot water anywhere and anytime.
- 20-minute Automatic Safety Shutoff Timer
The unit features a 20-minute safety shutoff timer which is activated when it runs longer than 20 minutes or is tilted in 45 degrees in either direction. This helps conserve energy and provides monetary savings in the long run.
- Overheat Prevention
Like most outdoor portable tankless water heaters, Eccotemp L10 portable tankless water heaters run on liquid propane. For increased safety, they were built with a two D-cell battery ignition that only starts the flame when water is running and an electricity supply is unavailable. This ensures that the unit does not overheat and is also a great way to save energy.
Eccotemp L10 is undeniably one of the top portable outdoor tankless water heaters on the market. It has a manual water heater and water pressure systems, using which you can adjust the water’s temperature and pressure level according to your preferences.
6. Stiebel Eltron Tempra 29 Plus, tankless electric water heater
Stiebel Eltron’s other great product Stiebel Eltron Tempra 29 Plus also doesn’t fail to live up to the standards set by the German company. Being one of the best-rated products from Stiebel Eltron’s Tempra range, it offers a variety of functions along with Stiebel Eltron’s signature reliability. The features offered by the Tempra range are really what makes them unique.
It features a large, backlit multifunction display and two temperature memory keys. It also ensures safety by putting a temperature limit(childproofing). It saves installation space with its compact design too.
The Stiebel Eltron Tempra 29 Plus is designed for the whole house and commercial use in cold climates where incoming water temperatures can drop below 45°F. Not only that, but it is also a favourite for homes in warmer climates with high flow demands where multiple simultaneous hot water demands are required.
- True Microprocessor-Controlled Temperature Regulation
The unit regulates temperature and comes with a convenient digital temperature display and dial selector which allows you to select the desired output temperature anywhere between 86°F to 104°F. This feature also ensures that you receive endless hot water.
- Easy Accommodation
The Stiebel Eltron Tempra 29 is compact and about the size of a small briefcase allowing it to be conveniently placed. Additionally, it needs no ventilation.
- Advanced Flow Technology
Similar to other Tempra models, Tempra 29 also offers the brand's iconic Advanced Flow Technology. This will automatically regulate the flow rate if its capacity is exceeded. In simpler terms, it maintains hot water temperature for your constant comfort.
Just like Tempra 24 Plus, it is a premium tankless water heater. This also ensures the quality that Stiebel Eltron has been supplying for years. It provides the most precise temperature control of any tankless water heater on the market today.
7. Rinnai RL75iN HE+ Tankless Hot Water Heater: Indoor Installation
From Rinnai’s Luxury line, we look at Rinnai RL75iN HE+ tankless water heater. It is one of Rinnai's top-selling models and holds a high reputation in giving solid results.
The Rinnai RL75iN tankless water heater is an indoor, non-condensing, energy-efficient unit. This is the perfect option for an electric tankless water heater solution that is suitable for both residential and commercial use. It is a powerful gas tankless water heater that can provide an endless supply of hot water.
This also features their well-known Circ-Logic technology which recirculates water according to set patterns by the user. This allows them to coincide with your general habits so that hot water is available right when you need it. RL models are high efficiency plus(HE+) production of tankless water heaters. They are SCAQMD approved and allow up to 5 fixtures. Along with this, they are also capable of Wi-Fi connection.
- Programmable Usage Patterns
This constitutes an optional 24-hour programmable digital controller which will schedule around your daily usage patterns. This can prove to be very benefactory and convenient. If your home is set up with Alexa, you can even control the unit with voice prompts.
- Diagnostic Capabilities
Its easy-to-use digital electronic panel is used for running diagnostics and displaying error codes. RL75iN will alert you whenever any problem arises or if maintenance is required. The unit is also WiFi-enabled, which enables you to add Control-R to monitor and manage it remotely.
- ThermaCirc360 Technology
The wonderful ThermaCirc360 technology used by Rinnai tankless water heaters recirculates hot water through your pipes to get you your hot water immediately.
- Temperature Lock System
The temperature lock system prevents accidental changes to the water temperature. This feature can be very useful to protect the system if you have children.
Overall, this product delivers the quality promised by Rinnai and is up to its standards. It is highly energy-efficient and sets a good example for the RL models. Its compact design also makes it suitable for indoor use.
Another Rinnai product on our list? Of course! The quality and performance offered by their products are almost unmatched and are more than worth their price.
The Rinnai V75iN is a part of the HE line. They are a non-condensing line of high-efficiency tankless water heaters. This model is combined with both value and comfort for most of the small to medium home hot water consumers. The numerous features that it possesses make it ahead of most of the others in its range.
The model consists of WiFi connection capabilities and allows about 5 fixtures. Similar to the RL75iN, it is SCAQMD approved.
- Mobile App Scheduling
The Control-R 2.0 mobile app features timers and schedules throughout the day and allows the user to remotely put the system into vacation mode. The feature of controlling the unit remotely provides extra convenience and ease of operation.
- Easy to Install and Maintain
Rinnai has included a manual that contains every instruction to handle the V75iN tankless water heater. Rinnai also offers a 10-year warranty covering heat exchange and 5 years on the parts.
According to Rinnai, the V75iN has been approved for use in altitudes up to 10200 feet. The product is also operatable in mobile and manufactured living spaces. This wide variety of ways it can be used makes it an ideal product for more amount of people.
- Multiple Safety Features
There is a scale control system which ensures that the device does not break due to the accumulation of scale. This adds to the life of the device. Rinnai 75iN also consists of frost protection features which ensure that water that remains in the tube does not spoil the tool. A hot water temperature lock also exists, and it prevents any breaches.
Despite being expensive, the qualities of this product make it a worthy investment. It is an indoor low NOx tankless natural gas water heater that delivers a unique performance and it is advisable to get it for your hot water needs. Especially if you live in small to medium households.
Eccotemp is a familiar name in the world of tankless water heaters. From the outdoor portable water heaters like the Eccotemp L10 to whole-home indoor water heaters like the Eccotemp i12-NG, this brand does it all. This gives you all the more reason to trust in its name.
The Eccotemp i12-NG is a whole-home indoor, gas-powered tankless water heater that activates only on demand and does not need any pilot light, thus reducing the energy consumption. This heater is suitable for those who are in small homes or own smaller households. It can handle 1-2 faucets at a single time.
It has famously brought a significant in tankless water heaters in terms of its state of the art design and related amazing features.
- Automatic Temperature Control+Digital Display
The technology this model possesses is exceptional and user-friendly. The fully automatic temperature control along with a touch screen and LCD temperature display enables you to choose the temperature desire and maintain it at that. This includes an energy-saving mode and child-lock technology. Therefore, it can cut down your bills and be very safe at the same time.
- Adequate Body Design
Unlike the metal casing of most water heaters which might heat up on you, this model offers a black acrylic glass casing that keeps it light in weight without compromising your safety in any way, shape or form.
- Flexible and User-friendly
The water heaters small dimensions and shape make it easier to place it anywhere your heart desires. It is user-friendly in terms of installation and system settings.
The Eccotemp i12-NG indoor tankless water heater is a great choice for people who have cabins or smaller homes. This water heater is graced with extra features due to which it is one of the best tankless water heaters. It is an output oriented water heater with state of the art design and has cost-effective hot water production which makes it the right choice.
The famous Titan water heaters are produced by Niagara Industries. The company has been manufacturing reliable and durable goods. Titan SCR2 N-120 is one of its widely used models which consists of advanced technologies.
The Titan SCR2 N-120 tankless water heater is a model that performs to a solid level all across the board. a good investment and can prove to be very fruitful in the long run. It is small compared to even the Eccotemp portable model in our list. In short, you would not face any difficulties fitting this tankless water heater anywhere near a utility that requires hot water.
All Titan-SCR2 integrate a manually resettable thermostat combined with a fast and fully accurate temperature sampling mechanism. Unlike its competitors, these models possess an advanced air/water deferential analyzing system to prevent dry starts.
- High Energy Efficiency
It offers 99.5% of energy efficiency. The smart electronic board of the Titan N-120 works with a self-controlling microcontroller. The power control technology samples the data and manages power consumption for efficiency and optimisation of temperature.
- Easy to Install and Well-Designed
The Titan SCR2 N-120 tankless water is very easy to install right away. The small dimensions and light weight enables it to be installed virtually anywhere. It is about 80 times smaller than a conventional water heater. It can be hung on a wall, which can save a lot of floor space. It also has a simple yet elegant looking design.
- Convenient Thermo Controls
The Titan SCR2 N-120 allows versatile and reliable power control for applications for either a whole condo or a small house. It is equipped with a digital display which makes it easier to set temperature and use. The colour amber signifies when it is operating and when it is on standby mode.
The Titan SCR2 N-120 electric tankless water heater is an efficient option for a medium-sized household in warmer climates. It has adjustable temperature controls and is also very easy to install, even by yourself.
Best Tankless Water Heater | Buyer’s Guide
How does a tankless water heater work?
As we mentioned at the beginning, a tankless water heater heats water directly without the use of a storage tank. Whenever a hot water tap is turned on, either an electric element or gas burner heats the cold water that travels through a pipe into the unit. As a result, the tankless water heaters constantly deliver hot water.
Why would you need a tankless water heater?
- They heat water instantly, so you don’t have to wait for the water to get hot over long periods of time.
- Some of the models can supply water to different outlets simultaneously.
- Thanks to the high energy efficiency, tankless water heaters constantly save you money over time.
- They are usually sleek and compact and require significantly less storage space than a storage tank water heater.
- They have a longer lifespan. A tankless water heater of good quality can last over two decades, twice as long as normal heaters.
- Some models have great portability and can be used outdoors when camping, trekking etc.
Buying a Tankless Water Heater
Generally, you might read the multitude of water heater reviews here and there to determine which the best model is, but contrary to what it seems, it is a bit more complicated than that. If you are going to purchase a tankless water heater, it would be in your own best interest if you pick the one that best matches your needs.
Buying a tankless water heater can turn out to be a pretty big investment as they are expensive and one can’t afford to make mistakes when selecting one for their household. These heaters differ in various aspects and because of that, choosing the right one can be turn out to be confusing and problematic.
All things considered, there are only a couple of questions into which all of these confusing aspects can be grouped up into.
What exactly are your requirements(This considers the various factors of your day to day life)?
How do you determine these needs?There are some factors that you need to consider in order to get the answers.
- Flow Rate
The flow rate is the amount of water that can pass through your tankless water heater while being heated at the same time. It is measured in Gallons Per Minute (GPM). It is important because if the flow rate of the heater cannot match the demands of your house, you may experience temperature fluctuations and receive cold water instead.
This factor is mainly determined by the size of your household and your daily needs. Some heaters can supply for multiple outlets like sinks, dishwashers, bathrooms and kitchens while the others are capable of handling only a single outlet at a time.
For a medium house, with multiple baths and sinks, the heater should have at least a 6 GPM of flow rate.
In case of those who live alone or have a single bedroom apartment, those heaters with a flow rate of around 3 GPM are usually adequate and cost-effective.
- The Power Source
You can opt either for electric-powered or gas-powered(propane or natural gas) heaters. This is a critical decision that one needs to make when looking for a water heater. A good tankless water heater would offer a continuous flow of hot water and help you conserve energy, bringing down your bills.
There are three main sources of energy for tankless water heaters. Most of the modern units but many also commonly work with propane or natural gas. The easily available source in your locality determines the type of tankless water heater that you should select. It would also be a wise decision to compare the prices of all the energy sources in your locality before finalizing a tankless water heater for you to buy.
Electric-powered units are usually energy-efficient but cost more than the gas-powered tankless water heaters in terms of operation. They are also less powerful than their gas-powered counterparts.
The installation is relatively easier but on the other hand, it might require an electrical upgrade.
The other good aspects are that they are sleek and occupy little space. Electric heaters require pretty little maintenance. These systems generally do not require any other attention to operate in peak form other than simply cleaning the water inlet screen on a regular basis and an occasional flushing. Some newer heaters even come with self-maintenance features.
Gas-powered tankless water heaters are the most powerful and heat water fast. However, they cost way more than the electric option. Natural gas and propane-powered units require ventilation to discard the exhaust let-off the ignition flame.
Their installation is costly. Gas-fueled tankless water heaters should be inspected on an annual basis by a trained professional who can check safe fuel combustion and ensure that the system is performing as it should, as well as complete some general maintenance. The mandatory vent installation that comes with it requires professional help. Improper installation can lead to some risks and compromise warranty. Therefore, hiring a professional is necessary.
It also requires regular maintenance and constant checking of the vent pipes. You might also find value in gas or propane models if portability or absolute heating power is your primary need.
Tankless water heaters should be convenient to use. Some heaters consist of digital displays and a few control buttons. Some of the others feature some auto-regulation mechanisms, which are pretty handy in the long run.
- Sizing The Water Heater
When sizing a tankless water heater, we need to think in terms of water flow, unlike tank water heaters where we generally think about capacity. Finding the correct sized tankless water heater to satisfy your household’s hot water needs since there isn’t a tank to buffer any shortages during peak periods.
For this, you mainly need to determine your household’s flow rate at peak periods. After factoring that with your home’s temperature rise, you can decide on a size that would be suitable for your needs.
- Professional or DIY installation
Almost all tankless water heaters should preferably be installed professionally in order to prevent the warranty from becoming void.
Considering the aforementioned points, you can come to a decision. Questions like the following should be answered:
- Do you have the correct power requirements?
- How to set up proper ventilation if it is a gas or propane usage?
- Have you determined the installation place of the unit? You need to consider the waterline, electric outlets, gas lines and their proximity to the water heater.
Hiring a water heater expert would cost a lot initially, but it saves you a lot of money in the future, especially if your unit fails and you are unable to claim warranty.
Frequently Asked Questions
1) How many tankless water heaters would be enough to heat my entire house?
Depending upon the model you choose, a single tankless water heater can be enough to function for your entire house. You can buy a tankless water heater which can serve multiple outlets simultaneously at a slightly higher cost, or you can buy a cheaper heater which is capable of handling one outlet at a time.
2) Is it possible to replace my existing tanked water heater with a tankless option?
Yes, it is possible. However, there are some specific requirements to attend to before you can opt for a tankless option. As we stated earlier, gas heaters would require a special venting pipe. You’ll also need access to a gas supply line. If you go for an electric heater, you might need bigger gauge wires and breakers than the ones currently being used by your tanked water heater.
3) How much money can I save?
Depending on the model of tankless water heater that you purchase, the size of the storage tank you currently have and if it runs on gas or electricity, you can save anything from 6% to 70% off your bill. A system that eliminates storage and provides hot water only as you use it can dramatically decrease your energy consumption.
4) Is it alright to install a tankless water heater myself?
Although it is possible, in most cases, we would recommend that you get your water heater installed professionally. It may result in a void of warranty as well and that could prove to be a pretty hefty hit to your purse. In fact, a lot of the time, this goes against the local plumbing code too.
5) Is it true that you cannot install some tankless water heaters in certain areas?
Yes, there are some areas and localities which don’t permit the installation of certain models of tankless water heaters for specific reasons. So, it is important to check with your local authorities before ordering your heater.
6) What to do if I have hard water?
Since the tankless water heaters don't store water, the minerals cannot settle at the bottom. The water softener is also used pretty effectively in a tankless water heater. Additionally, the water flow along the coiled heat exchanger takes out these products every time.
7) Can existing venting be used?
An existing vending shouldn’t be used. It is highly suggested to use the specified venting approved or recommended by the manufacturers of the tankless water heaters. Most of the manufacturers recommend concentrate venting. This needs only a single wall penetration for inhalation and exhaust.
8) Does the tankless water heater work well even if I live in high altitudes?
Gas model tankless water heater might not function as effectively in areas of higher altitude. Conversely, an electric model would not be affected by altitude.
9) Can a point of use tankless water heater work in places other than a sink?
Yes, you can. One can place a mini-storage tank in line with the main water heater to use it for other applications. These are available in sizes varying from 2.5 gallons to 6 gallons. This can instantly provide hot water at your dishwasher or washing machine.
10) How much maintenance would a tankless water heater require?
A tankless water heater requires maintenance albeit considerably less than other machines. Its maintenance is pretty easy. You can get it done by your technician or yourself. It mainly requires flushing from lime & scale and checking the inline screen filter.
11) How long will my tankless water heater last?
With regular maintenance, your tankless water heater can last long enough to return the value of your invested money and then some. The type of installation and usage may also have an effect on the life expectancy of your tankless water heater. Generally, most models can last between 15 to 25 years considering it has some favourable factors like quality water and good installation.
For outdoor tankless water heaters, you should install it in a place which is relatively safe from the wheather elements such as rainfall or snow.
Some of the latest models come with a self-diagnosing internal mechanism that alerts you about any malfunction which helps increase durability.
The world is shifting to using greener and sustainable energy sources. Tankless water heaters hold a good potential now and especially in the future. The best thing about them is that they not only are convenient to store but also save a lot of energy which means you save money.
As in the case of any home appliances, it is important to shop right when looking for tankless water heaters. The fact that most of the tankless water heaters come with a heavy price tag increases the necessity of buying more carefully.
There are various water heaters available in the market and online. To get the best tankless water heater for your requirements, you should go through the entire reviews of the tankless water heaters. It can be used to simply compare and contrast the price tags and features of each of the individual tankless water heaters to ensure that you get the most suitable one for yourself.
After all this, narrowing down your options and taking the last decision comes down to you. We hope that information provided in this article has been useful for you and would help you find the exact heater that would suit your requirements.