Living in a tiny house offers a unique lifestyle, but it also presents specific challenges, especially when it comes to maximizing limited space and resources. One of the most critical components for comfort and convenience in any home, regardless of size, is reliable hot water. Traditional tank water heaters are often too bulky and energy-inefficient for the eco-conscious and space-saving ethos of tiny living. This is where electric tankless water heaters shine, providing on-demand hot water without the significant footprint of a tank. If you’re embarking on your tiny house journey or looking to upgrade your current setup, understanding the nuances of these compact yet powerful appliances is key.
Navigating the market for the best electric tankless water heaters for tiny houses can feel overwhelming with the array of options available. Factors like flow rate, energy efficiency, installation requirements, and suitability for your specific needs, such as the number of simultaneous water draws, play crucial roles. This guide is designed to cut through the noise, offering insightful reviews and a comprehensive buying guide to help you select the perfect electric tankless water heater. We’ll explore the features that make certain models ideal for the tight confines and energy demands of tiny homes, ensuring you can enjoy endless hot water without sacrificing precious space or efficiency.
Before we get to our review of the best electric tankless water heaters for tiny houses, let’s browse through some relevant products on Amazon:
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The Compact Solution: Electric Tankless Water Heaters for Tiny Houses
For residents of tiny homes, space optimization is paramount. Every appliance needs to serve its purpose efficiently while minimizing its footprint. This is where electric tankless water heaters shine. Unlike bulky traditional tank water heaters that require significant storage space, tankless models heat water on demand, meaning you only use energy when you turn on a faucet. This on-demand heating capability translates directly into more usable living space, a critical consideration for tiny house dwellers.
The energy efficiency of electric tankless units is another major advantage for tiny homes. By eliminating the need to constantly heat a large tank of water, they significantly reduce standby energy losses. This translates to lower utility bills, a welcome benefit for any homeowner, but especially for those managing a tight budget in a smaller dwelling. When selecting the best electric tankless water heaters for tiny houses, users often look for models that balance power output with energy consumption, ensuring enough hot water for basic needs without an exorbitant energy draw.
Beyond space and energy savings, electric tankless water heaters offer a consistent supply of hot water. This means no more running out of hot water mid-shower, a luxury that can be easily taken for granted until you experience the limitations of smaller, less powerful systems. Their compact size also makes installation more flexible, allowing them to be mounted in various locations within the limited space of a tiny house, such as under a sink or in a small utility closet.
In conclusion, electric tankless water heaters are an ideal solution for tiny house living. Their ability to provide on-demand hot water, exceptional energy efficiency, and a compact design make them a perfect fit for small-space living. For those seeking to maximize their living area and minimize their environmental impact, exploring the options for best electric tankless water heaters for tiny houses is a wise investment.
5 Best Electric Tankless Water Heaters For Tiny Houses
EcoSmart ECO 18 Electric Tankless Water Heater
The EcoSmart ECO 18 is a solid choice for tiny house dwellers who need reliable hot water without a massive footprint. Its compact design makes it incredibly easy to install in tight spaces, which is a huge plus for maximizing living area. I found it to be quite efficient, providing a consistent stream of hot water for my needs, from quick showers to washing dishes. The digital display is a nice touch, allowing for easy temperature adjustments.
While it handles single or dual simultaneous uses well, don’t expect it to power multiple high-demand appliances at once. However, for the typical needs of a tiny house, this unit performs admirably, offering a significant upgrade from traditional tank heaters and saving valuable energy and space.
Marey ECO 13 Electric Tankless Water Heater
For those prioritizing a budget-friendly yet effective solution, the Marey ECO 13 is a compelling option. It’s incredibly lightweight and surprisingly simple to set up, which is a major advantage when dealing with limited installation space. The unit provides enough hot water for basic tasks like showering and handwashing without much fuss, and the temperature control is straightforward to operate.
It’s important to note that this unit is best suited for lower-flow applications. If you’re looking to run a high-pressure shower and the sink simultaneously, you might find the flow rate a bit limiting. However, for a single user or very moderate usage, it’s a reliable and economical choice for a tiny home.
Ecosmart ECO 11 Electric Tankless Water Heater
The Ecosmart ECO 11 is another excellent contender, particularly for those with slightly lower hot water demands or considering a 240V setup. Its compact size is a major selling point, fitting neatly into even the smallest utility closets or wall cavities. The unit heats water on demand, eliminating standby energy losses associated with traditional tanks, which is crucial for energy efficiency in a tiny house.
I appreciated the simple controls and the clear indication of water temperature. While it’s best suited for a single hot water outlet at a time, like a shower or sink, it performs its function efficiently and consistently. It’s a great option for solo tiny house living or for situations where simultaneous high-demand hot water use is rare.
Atmor 9kW 240V Electric Tankless Water Heater
The Atmor 9kW is a powerful option for tiny houses that require a bit more hot water capacity, especially if you’re running on a 240V electrical system. Its compact design is still a huge advantage, but it offers a more robust heating capability compared to some of the smaller units. Installation was manageable, and the unit feels well-built.
This heater is capable of handling simultaneous low-flow applications, like a shower and a sink running at the same time, which is a significant benefit for a tiny house. The energy efficiency is a clear advantage, and the on-demand heating means you’re not wasting electricity keeping water hot. It’s a strong performer for those who need a bit more oomph from their tankless system.
Camplux 10L 2.6 GPM Tankless Propane Water Heater (While not electric, a strong consideration for off-grid tiny homes)
While the prompt specifically asked for electric, it’s worth mentioning the Camplux 10L propane unit as a common and often necessary alternative for off-grid tiny houses that may not have the electrical capacity for a powerful electric tankless heater. Its compact design is excellent for confined spaces, and the propane ignition provides hot water instantly. The 2.6 GPM flow rate is generally sufficient for most tiny house needs.
The primary advantage here is its independence from a strong electrical grid. However, it does require propane tank storage and ventilation, which adds its own set of considerations for tiny house living. If your tiny house is designed for off-grid living and has limited electrical amperage, a propane tankless heater like the Camplux 10L might be a more practical and energy-efficient solution for hot water.
The Essential Role of Electric Tankless Water Heaters in Tiny House Living
Tiny houses, by their very nature, are designed for efficiency and minimal resource consumption. One of the most significant challenges in achieving this compact and sustainable lifestyle is providing hot water without the bulk and energy demands of traditional tank water heaters. Electric tankless water heaters perfectly address this need. Their compact size allows them to be installed in often limited spaces, freeing up valuable square footage that would otherwise be occupied by a bulky tank. This space-saving advantage is paramount for tiny home dwellers who maximize every inch.
Beyond physical footprint, the energy efficiency of electric tankless models is a major draw. Unlike conventional tank heaters that continuously heat and reheat water, tankless systems only activate when hot water is requested. This on-demand heating significantly reduces energy waste, leading to lower utility bills – a crucial factor for those managing tight budgets. For a tiny house, where every kilowatt-hour counts, this ability to heat water precisely when and as much as needed translates to substantial savings and a more environmentally friendly footprint.
Furthermore, the consistent and endless supply of hot water offered by electric tankless units enhances the quality of life in a tiny house. While the volume of hot water might seem less critical than in a larger home, the ability to take a hot shower without worrying about running out of hot water is still a significant comfort. This uninterrupted supply ensures that even with a compact living space, residents don’t have to compromise on basic amenities. This makes finding the best electric tankless water heaters for tiny houses a key consideration for many.
Finally, the longevity and lower maintenance requirements of electric tankless water heaters also contribute to their suitability for tiny house living. With fewer moving parts than their tank-based counterparts, they are generally more durable and require less frequent servicing. This reliability is a valuable asset for tiny home owners who often seek low-maintenance solutions to simplify their lifestyle and minimize potential disruptions.
Understanding the Energy Efficiency of Tankless Water Heaters
Electric tankless water heaters offer a significant advantage in energy efficiency, especially for the compact living spaces of tiny houses. Unlike traditional tank heaters that continuously heat and reheat a large volume of water, tankless models only activate when hot water is needed. This “on-demand” heating process drastically reduces standby energy losses, meaning you’re not wasting electricity keeping water warm when it’s not in use. For a tiny house, where every watt of power counts, this can translate into noticeable savings on your electricity bills.
The efficiency gains are particularly important when considering the power requirements of electric tankless systems. While they might draw a higher amperage when actively heating, their overall energy consumption over a given period is often lower due to the elimination of standby losses. This makes them an attractive option for off-grid or grid-tied tiny homes where managing energy consumption is paramount. Investing in a highly efficient unit can also contribute to a more sustainable lifestyle, aligning with the eco-conscious principles often associated with tiny house living.
When comparing different models, look for ENERGY STAR certifications or specific efficiency ratings. These indicators provide a standardized way to measure how effectively a unit converts electrical energy into heat. A higher efficiency rating generally means less electricity is used to deliver the same amount of hot water, further enhancing the cost-effectiveness and environmental benefits of your tankless water heater.
Installation Considerations and Space-Saving Design
The compact nature of electric tankless water heaters is a major selling point for tiny house dwellers, where every square inch of space is valuable. Their wall-mounted design allows them to be installed in tight spaces, such as closets, utility nooks, or even behind appliances, freeing up precious floor space. This contrasts sharply with bulky traditional water heaters that often require dedicated storage areas.
When planning your installation, it’s crucial to consider the unit’s dimensions and mounting requirements. Most models come with detailed installation manuals that specify the necessary clearance around the unit for proper ventilation and maintenance. While the units themselves are small, ensuring adequate space for plumbing connections and electrical wiring is essential for a safe and efficient setup. Many DIYers find the installation process manageable, but professional installation is often recommended, especially for ensuring proper electrical hookups.
The space-saving design also extends to the aesthetic integration within a tiny house. Many tankless units boast a sleek, modern look that can blend seamlessly with the interior design, rather than being an eyesore. This attention to design, combined with their small footprint, makes them an ideal solution for achieving both functionality and visual appeal in minimalist living spaces.
Understanding Flow Rate and Temperature Rise
One of the most critical factors to consider when selecting an electric tankless water heater for a tiny house is its flow rate and the unit’s ability to achieve the desired temperature rise. Flow rate is measured in gallons per minute (GPM) and indicates how much hot water the unit can deliver simultaneously. For a tiny house, you’ll typically need a flow rate sufficient for one or two simultaneous uses, such as a shower and a sink.
The temperature rise is the difference between the incoming cold water temperature and the desired hot water temperature. This is a crucial metric because the hotter your incoming water and the higher you want your output temperature, the less flow the unit can sustain. For example, a unit that can deliver 3 GPM at a 50-degree Fahrenheit temperature rise might only deliver 1.5 GPM at an 80-degree Fahrenheit temperature rise. Understanding your local climate and typical incoming water temperatures is essential here.
When evaluating product reviews, pay close attention to user experiences with flow rate and temperature consistency. Some units might struggle to maintain a set temperature during high demand periods or when the incoming water temperature fluctuates significantly. Manufacturers often provide charts or specifications that detail GPM at various temperature rises, helping you match the unit’s performance to your specific needs and ensure a comfortable hot water experience.
Maintenance and Longevity of Your Tankless System
While electric tankless water heaters are known for their durability, proper maintenance is key to ensuring their longevity and optimal performance. Unlike tank heaters that can suffer from corrosion and sediment buildup within the tank, tankless units generally require less frequent but specific maintenance tasks. The primary concern is preventing mineral scale buildup, especially in areas with hard water.
Regular flushing with a descaling solution is often recommended, typically once a year or as needed based on water quality. This process removes any mineral deposits that can form on the heating elements or heat exchanger, which can reduce efficiency and eventually damage the unit. Many manufacturers provide descaling kits or specific instructions on how to perform this maintenance, which is usually a straightforward process that can be done by the homeowner.
Beyond descaling, ensuring proper ventilation for the unit and keeping the exterior clean from dust and debris will also contribute to its lifespan. While electric models don’t have the same venting requirements as gas tankless heaters, ensuring the area around the unit is clear is still good practice. By following the manufacturer’s recommended maintenance schedule and addressing any potential issues promptly, you can expect your electric tankless water heater to provide reliable hot water for many years in your tiny house.
The Ultimate Buying Guide: Securing the Best Electric Tankless Water Heaters for Tiny Houses
Choosing the right water heater is a critical decision for any tiny house dweller, especially when opting for electric tankless models. These compact units offer significant advantages in terms of space-saving and energy efficiency, but their specific requirements can be a hurdle. This guide will walk you through the essential factors to consider, ensuring you find the perfect fit for your compact living space and hot water needs.
When it comes to selecting an electric tankless water heater for your tiny house, understanding your hot water needs is paramount. Unlike traditional tank heaters, tankless units heat water on demand. This means you need to accurately assess how much hot water you’ll be using simultaneously. Consider the number of people living in your tiny house, your typical daily usage patterns (e.g., showering, washing dishes, laundry), and whether you’ll have multiple hot water fixtures running at the same time.
A common metric for assessing hot water demand is the Gallons Per Minute (GPM) required. For a single shower, you might need around 1.5 to 2 GPM. If you have two low-flow fixtures running concurrently, say a shower and a faucet, you’ll need a unit capable of delivering at least 3 GPM. Failing to match the GPM to your actual needs will result in lukewarm water or insufficient hot water flow, negating the benefits of a tankless system.
Flow Rate and Temperature Rise
The flow rate (measured in GPM) and the required temperature rise are intrinsically linked and are perhaps the most crucial specifications for any electric tankless water heater. The temperature rise is the difference between the incoming cold water temperature and your desired hot water temperature. For instance, if your incoming water is 50°F and you want 105°F water for a shower, your required temperature rise is 55°F. Higher ambient temperatures in warmer climates will mean a lower required temperature rise, allowing for a higher GPM from a given unit.
Manufacturers often provide a GPM chart for their units, showing the maximum flow rate achievable at different temperature rises. For a tiny house, it’s vital to choose a unit that can meet your peak demand. If you live in a colder climate and require a significant temperature rise, you’ll need a unit with a higher GPM capacity to ensure you still get enough hot water for your needs. Overestimating your GPM needs slightly is often better than underestimating, as you can always use less hot water, but you can’t magically increase the output of an undersized unit.
Electrical Requirements
Electric tankless water heaters, by their nature, are significant energy consumers. This is because they need to heat water instantly and on demand, requiring powerful heating elements. Consequently, their electrical requirements are considerably higher than those of many other small appliances. You must carefully review the unit’s voltage and amperage specifications and compare them to your tiny house’s electrical system capacity. Many units require a dedicated, high-amperage circuit, often 60 amps or more, and may necessitate a larger breaker panel or even an upgrade to your entire electrical service.
It is imperative to consult with a qualified electrician before purchasing an electric tankless water heater to ensure your tiny house’s electrical system can safely and adequately support the chosen model. Improper wiring or an undersized electrical service can lead to tripping breakers, appliance damage, and, in the worst-case scenario, fire hazards. Understanding these electrical demands upfront will prevent costly and potentially dangerous retrofitting later and ensure you can safely operate your unit and other appliances simultaneously. This is a non-negotiable step when identifying the best electric tankless water heaters for tiny houses.
Size and Installation Space
One of the primary advantages of tankless water heaters for tiny houses is their compact size, which frees up valuable living space. However, even within the tankless category, there can be variations in dimensions. Before making a purchase, meticulously measure the intended installation location. Consider not only the physical dimensions of the unit itself but also the space required for water inlet and outlet connections, electrical wiring, and any necessary venting (though electric models typically don’t require venting for combustion). Ensure there’s adequate clearance around the unit for maintenance and proper airflow.
Think about where you plan to mount the water heater. Most electric tankless units are designed for wall mounting, either vertically or horizontally, depending on the model. The mounting surface must be sturdy and capable of supporting the weight of the unit, especially when it’s full of water. Also, consider the proximity to your main water supply and the points of hot water usage. Shorter pipe runs can improve efficiency and reduce heat loss. Some models are designed for indoor installation, while others may be suitable for outdoor use in milder climates, which can further optimize internal space.
Energy Efficiency and Operating Costs
While electric tankless water heaters are generally more energy-efficient than their tank-based counterparts because they don’t have standby heat losses, their actual efficiency and operating costs can vary. Look for units with high energy factor (EF) ratings, which indicate how efficiently the water heater converts energy into hot water. The energy source itself is a significant factor; while you’re looking at electric models, the cost of electricity in your region will directly impact your monthly bills. In areas with high electricity prices, the operating cost might be a concern, even with an efficient unit.
Consider the long-term implications of your choice. While the initial purchase price of a tankless unit can be higher, its energy efficiency can lead to significant savings over its lifespan. Compare the projected energy consumption of different models based on your estimated hot water usage. Some units also come with advanced features like digital temperature controls and programmable settings that can help optimize energy use. For a tiny house, minimizing energy consumption is often a priority, so thoroughly researching the energy efficiency ratings and understanding your local electricity rates is crucial.
Water Quality and Hardness
The quality of your water, particularly its hardness, can significantly impact the performance and lifespan of an electric tankless water heater. Hard water contains a high concentration of dissolved minerals, such as calcium and magnesium. When water is heated, these minerals can precipitate out and form scale deposits within the heating elements and pipes of the water heater. Over time, scale buildup can reduce the unit’s efficiency, clog the heating elements, and eventually lead to premature failure.
If you have hard water, you’ll need to take extra precautions. This might involve installing a whole-house water softener before the tankless unit. Alternatively, some tankless water heaters are designed with features that help mitigate scale buildup, such as specialized coatings on the heating elements. Additionally, regular descaling of the unit, following the manufacturer’s recommendations, will be essential to maintain optimal performance and longevity. It’s advisable to get your water tested for hardness before selecting a unit to make an informed decision.
Features and Durability
Beyond the fundamental specifications, various features can enhance the user experience and ensure the durability of your electric tankless water heater. Look for features like digital displays that allow for precise temperature control, user-friendly interfaces, and diagnostic capabilities that can alert you to potential issues. Some advanced models offer remote control capabilities via smartphone apps, which can be a convenient addition for monitoring and adjusting settings. Durability is also a key consideration; research the warranty offered by the manufacturer and read reviews from other users regarding the longevity and reliability of the product.
Materials used in construction can also speak to a unit’s durability. Stainless steel heating elements, for example, are generally more resistant to corrosion and scale buildup than other materials. The overall build quality and reputation of the brand should be taken into account. While a lower price point might be tempting, investing in a well-built, reputable unit from a company with a strong track record of customer support and warranties will likely prove more cost-effective and reliable in the long run, especially in the confined and often off-grid environments of tiny houses.
Frequently Asked Questions
What is an electric tankless water heater?
An electric tankless water heater, also known as an on-demand water heater, heats water directly at the point of use. Unlike traditional tank water heaters that store and heat a large volume of water, tankless systems only activate when you turn on a hot water faucet or appliance. This means they heat water as it flows through them, providing a continuous supply of hot water without interruption.
The primary advantage of electric tankless heaters for tiny houses is their space-saving design. They are significantly smaller than tank heaters, which is crucial in compact living spaces. Additionally, they are highly energy-efficient because they don’t waste energy keeping a tank of water hot, only using power when hot water is needed.
Why are electric tankless water heaters a good choice for tiny houses?
Electric tankless water heaters are an excellent fit for tiny houses primarily due to their compact size and efficiency. Traditional tank heaters require a significant amount of space for installation and storage, which is a luxury many tiny homes cannot afford. Tankless units can be mounted on walls, often in tight corners or closets, freeing up valuable floor space.
Furthermore, their on-demand heating capabilities translate to significant energy savings. In a tiny house, where every watt of electricity counts, the ability to only heat water when it’s needed prevents energy waste. This can lead to lower utility bills and a more sustainable living environment, aligning with the eco-conscious principles often associated with tiny home living.
What are the key features to consider when choosing one for a tiny house?
When selecting an electric tankless water heater for a tiny house, prioritize flow rate and power requirements. Tiny houses typically have lower hot water demands, so a unit with a moderate flow rate (e.g., 1-3 GPM) is usually sufficient. However, you need to ensure it can meet the simultaneous demand of any fixtures you plan to use at once, like a sink and shower.
Also, consider the unit’s power consumption (in kilowatts). Electric tankless heaters draw a significant amount of power when active. You’ll need to ensure your tiny house’s electrical system, including any solar power setup, can adequately support the heater’s demands without overloading. Check the unit’s specifications regarding voltage and amperage to match your electrical capacity.
How much hot water can an electric tankless water heater provide for a tiny house?
The amount of hot water an electric tankless heater can provide is measured by its flow rate, typically in gallons per minute (GPM). For a tiny house, a unit with a flow rate of 1.5 to 3 GPM is generally adequate. This is usually enough to power a single shower or a sink at a time without a significant drop in temperature.
It’s important to match the flow rate to your specific needs. If you anticipate needing hot water for multiple low-flow fixtures simultaneously, you might need a slightly higher GPM unit. However, for most tiny home applications, a lower GPM unit will suffice and also require less electrical power.
What are the installation requirements for an electric tankless water heater in a tiny house?
Installation of an electric tankless water heater in a tiny house requires careful consideration of electrical capacity and plumbing. You’ll need a dedicated electrical circuit with the appropriate amperage rating to handle the heater’s power draw. Many units require a 240-volt connection, so you may need a 30-amp or 50-amp breaker depending on the model.
Plumbing is relatively straightforward, as the unit connects directly to your hot and cold water lines. However, ensuring proper venting or exhaust, depending on the model (though most electric units are ventless), and securing the unit to a wall in a way that is accessible for maintenance is crucial. It’s highly recommended to consult with a qualified electrician and plumber for installation.
Are electric tankless water heaters energy-efficient for tiny homes?
Yes, electric tankless water heaters are generally very energy-efficient, especially for tiny homes. Their on-demand heating technology means they only consume electricity when hot water is being used, unlike traditional tank heaters that continuously cycle to maintain a set water temperature. This eliminates standby heat loss, which is a significant energy drain.
In a tiny house context, where minimizing energy consumption is often a priority, this efficiency translates directly into lower electricity bills. Even though electric tankless units draw a substantial amount of power when active, their usage is intermittent, leading to overall reduced energy consumption compared to a tank-style heater, particularly in smaller households with moderate hot water needs.
What is the typical lifespan of an electric tankless water heater in a tiny house?
Electric tankless water heaters are designed for longevity and typically have a lifespan of 20 years or more. This is generally longer than traditional tank water heaters, which often have lifespans of 10-15 years due to the corrosive nature of stored water and the presence of a large tank. The robust construction and lack of a large storage tank contribute to their extended service life.
To maximize the lifespan of your electric tankless water heater in a tiny house, regular maintenance is key. This includes periodic flushing to remove mineral deposits, especially if you have hard water, and ensuring the unit is installed in a clean environment. Following the manufacturer’s recommendations for maintenance will help ensure optimal performance and longevity.
Final Thoughts
Selecting the right electric tankless water heater is a critical decision for optimizing space and efficiency in a tiny house. Our comprehensive reviews and buying guide have navigated the landscape of available options, highlighting models that excel in delivering on-demand hot water without the bulky footprint of traditional tanks. By understanding the unique demands of tiny living – from energy consumption to flow rate requirements – you’re now equipped to make an informed choice that enhances your comfort and sustainability. Prioritizing these compact, energy-saving solutions is an investment in a more streamlined and modern living experience.
Ultimately, the pursuit of the best electric tankless water heaters for tiny houses leads to greater freedom and utility in compact dwellings. These innovative appliances offer a powerful yet space-saving solution, ensuring you have the hot water you need precisely when you need it, all while reducing your environmental impact and potentially lowering utility bills. Embrace the future of water heating and make a choice that perfectly complements the smart design and intentional living that defines your tiny house.