Thermomate Water Heater Review

Choosing the right water heater for your home can make a significant difference in your daily comfort and energy bills. You want a system that delivers hot water quickly, efficiently, and reliably without taking up too much space. Thermomate offers a variety of water heaters designed to meet different needs, from compact mini tanks to powerful tankless models. In this article, you’ll discover detailed reviews of seven Thermomate water heaters, helping you find the perfect fit for your home and lifestyle.

Top Picks

• Best Overall: ThermoMate Tankless Water Heater Electric, 11kW – $219.99
• Best For Small Spaces: Thermomate Mini Tank Water Heater Electric UL Listed, ES400B 4 Gallon – $169.99
• Best Budget Tankless: Thermomate Tankless Water Heater Electric, 8kW – $189.99
• Best Compact Mini Tank: Thermomate Mini Tank Water Heater Electric UL Listed, ES150B 1.3 Gallon – $144.49
• Best High Capacity Tankless: Tankless Water Heater Electric, ThermoMate 14kW – $249.99
• Best Plug-In Mini Tank: Thermomate Electric Tank Water Heater, 6.5 Gallons Mini Tank – $229.99
• Best Small Capacity Mini Tank: Electric Mini Tank Water Heater UL Listed, thermomate 2.5 Gallons ES250 – $179.99

How We Selected These Thermomate Water Heaters

We focused on several key factors to help you choose the right Thermomate water heater. First, we considered the type of water heater—tankless or mini tank—to suit different space and usage needs. Energy efficiency and power ratings were important to ensure you get reliable hot water without excessive electricity costs. We also looked at customer ratings and reviews to understand real-world performance and ease of installation. Finally, we considered price and value, so you can find a product that fits your budget while meeting your hot water demands.

ThermoMate 11kW Tankless Water Heater

If you’re tired of waiting forever for hot water or dealing with bulky tanks, this ThermoMate 11kW tankless water heater might be just what you need. It delivers instant hot water on demand, supporting up to three faucets with a solid flow rate of 2.15 gallons per minute at a 35°F rise. Its compact, wall-mounted design means it won’t hog your space, which is great if you’re working with a small bathroom or kitchen setup. Plus, it’s energy-smart with self-modulating tech that adjusts power use based on your water flow and temperature needs, helping you save on your utility bills. Whether you want quick hot water for your morning shower or need a reliable unit for a small office sink, this heater fits right in without fuss.

What People Say

People really appreciate how quickly this heater delivers hot water and how easy it is to install. Many mention saving space and lowering their water heating bills, especially in smaller homes or offices. The temperature display is a nice touch that helps you know exactly what you’re getting.

• This hot water heater works great. I like that it shows the temperature of the water coming out of the unit. Easy to install. Easy to use.– Pete Bedford
• I am so happy with my new under the counter hot water heater that was installed in my kitchen. I fully expect to see my water bill come down as I had to waste so much water just waiting for it to get hot at my sink. The unit only takes up a small amount of space in a cabinet and is so worth the cost to get hot water in just a few seconds. Thank you for a wonderful product!– Jean R

Long-Term Cost Benefits

Thanks to its self-modulating technology, this heater only uses the energy needed to heat your water, which can save you up to 60% compared to traditional tank water heaters. Over time, that adds up to noticeable savings on your electricity bill, especially if you’re switching from an older, less efficient unit.

Ease of Use

Maintenance Requirements

This unit is designed to be maintenance-free with a leak-proof cast aluminum heating chamber that keeps water and heating elements separate, preventing scale and corrosion. So, you can mostly set it and forget it without worrying about regular upkeep.

Durability

Built with a cast aluminum heating chamber and quality workmanship, this heater is made to last. Users report consistent performance over months without leaks or breakdowns, which is reassuring if you want something reliable.

Innovation

The self-modulating technology stands out here, automatically adjusting power based on water flow and temperature. This smart feature not only saves energy but also ensures you get a steady, comfortable water temperature without sudden spikes or drops.

Energy Efficiency

With 99% heating efficiency and the ability to save up to 60% on water heating costs, this ThermoMate model is a solid choice if you want to cut down on your energy use without sacrificing performance.

Problem Solving Ability

If you’ve struggled with slow hot water delivery or bulky tanks taking up space, this heater solves those issues by providing instant hot water in a compact design. It also includes safety features like overheating protection and automatic shutoff when no water is detected.

Key Benefits

• Instant hot water whenever you need it, no waiting around
• Compact design saves space in tight spots
• Energy-saving self-modulating technology cuts down on bills
• Leak-proof cast aluminum heating chamber for durability
• Easy installation with side water connections

Current Price: $219.99

Rating: 4.6 (total: 68+)

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ThermoMate Mini Tank Water Heater ES400B

If you’ve ever stood at your kitchen sink waiting for hot water to finally arrive, this ThermoMate Mini Tank Water Heater might just change your routine. It’s a compact 4-gallon unit designed to sit right under your sink, giving you instant hot water without the usual wait or waste. Whether you’re washing dishes, rinsing veggies, or just want a quick splash of warmth on a chilly morning, this little heater steps in perfectly. Installation is pretty straightforward — just plug it into a 120V outlet and connect it to your water line. It’s also versatile enough to mount on a wall, shelf, or floor, so you can fit it where it makes the most sense for your space. Plus, the enamel-coated tank helps keep things efficient and leak-free. If you want a simple, no-fuss way to get hot water right where you need it, this could be a smart pick.

What People Say

Users love how quickly this heater delivers hot water and how easy it is to set up. Many mention it’s a great solution if your main water heater is far from the faucet, saving water and time. The compact design fits nicely in tight spots without hassle.

• Works great in my RV, plenty of hot water.– Troy P.
• Simple to install. Well made. Solved my problem of having to wait long periods of time for water to get hot because my regular water heater is so far from the kitchen.– Kindle Customer

Long-Term Cost Benefits

Because it heats water on demand and keeps a small tank insulated, you avoid wasting water and energy heating large volumes you don’t need. Over time, this can help reduce your water heating bills, especially if you’re replacing inefficient setups or cutting down on water waste.

Ease of Use

Maintenance Requirements

This heater is pretty low maintenance thanks to its enamel-coated glass-lined tank that helps prevent leaks and corrosion. Just keep an eye on the pressure relief valve and follow basic safety checks, and you should be good for years.

Durability

The gold porcelain lining inside the tank adds a layer of protection against rust and leaks, and the unit is UL certified for safety. Many users report solid performance over time without issues, making it a dependable choice for everyday use.

Innovation

While it’s a straightforward design, the combination of compact size, foam insulation, and quick reheating makes it a clever solution for point-of-use hot water. It’s also versatile enough to work as a booster alongside a larger water heater if needed.

Energy Efficiency

With 24-hour standby and foam insulation, this mini tank minimizes heat loss and reheats quickly, helping you save on energy compared to running your main water heater constantly for small tasks.

Problem Solving Ability

If you’ve dealt with long waits for hot water or wasted gallons running the tap, this unit tackles those problems head-on. It’s perfect for sinks far from the main heater or for adding hot water to spots without existing supply.

Key Benefits

• Instant hot water right at your sink, no more waiting
• Compact size fits easily under sinks or in small spaces
• Easy installation with plug-in power and simple water connections
• Durable enamel-coated tank prevents leaks and improves insulation
• Flexible mounting options: wall, shelf, or floor

Current Price: $169.99

Rating: 4.4 (total: 144+)

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ThermoMate Tankless Water Heater 8kW

If you’re tired of waiting for hot water or dealing with bulky tanks, this ThermoMate tankless water heater is worth a look. It’s designed to give you instant hot water on demand, perfect for a couple of faucets or a small household. The compact wall-mounted design means it won’t hog space, and the self-modulating tech adjusts power based on your water flow and temperature, so you’re not wasting energy. Whether you’re rinsing dishes, taking a quick shower, or just want reliable hot water without the wait, this unit handles it smoothly. Just keep in mind it needs a 240V power supply and a 40 Amp double pole breaker, so it’s best suited if you’re comfortable with a bit of electrical setup or have a pro help out.

What People Say

People appreciate how quickly this heater delivers hot water and how it quietly does its job without fuss. Many mention it’s a solid backup or primary option for small homes or point-of-use setups, especially when space is tight. The energy-saving features and easy temperature control get good marks too.

• This was a lifesaver when my main water heater developed a leak. I used it for over two weeks on a 30 amp circuit, and it still managed to provide enough hot water for showers, dishwasher, and laundry. The unit heats instantly once water flow is detected, and the panel even warns if you’re drawing too much water. It’s simple but effective, and I was really impressed with how well it performed under pressure.– Stephen Hurff
• I replaced my old tank water heater with this 18kW tankless unit, and it’s been great. It’s super quiet and easy to adjust the temperature. Even with cold ground water, it heats up quickly and keeps the water plenty hot. It’s just me and my dog, so the flow and heat work perfectly for our needs. Looking forward to seeing the savings on my electric bill.– LNcouch

Long-Term Cost Benefits

Because it only heats water when you need it and adjusts power based on flow, you avoid wasting energy heating a full tank. Users have noticed savings of up to 60% compared to traditional tank heaters, which can add up nicely over time. Plus, the maintenance-free design helps keep ongoing costs low.

Ease of Use

Maintenance Requirements

Thanks to its leak-proof cast aluminum heating chamber and separated heating element, this unit keeps scale and corrosion at bay, meaning you won’t have to fuss with it much. Just a basic check now and then should keep it running smoothly for years.

Durability

The use of cast aluminum for the heating chamber and separation from water lines helps prevent leaks and corrosion, which means this heater is built to last. Many users report consistent performance over months without issues, making it a reliable choice for everyday use.

Innovation

The self-modulating technology is a smart feature here, automatically adjusting power based on water flow and temperature. This not only saves energy but also ensures you get consistent hot water without overheating or wasting electricity.

Energy Efficiency

With 99% heating efficiency and the ability to modulate power, this heater cuts down on wasted energy compared to traditional tank heaters. It’s designed to save you up to 60% on water heating costs, which is a big plus if you’re looking to trim your utility bills.

Problem Solving Ability

If you’ve struggled with waiting for hot water or dealing with bulky tanks, this unit solves those problems by delivering instant hot water right where you need it. It’s especially handy for tight spaces or as a backup when your main heater is out of commission.

Key Benefits

• Instant hot water on demand, no waiting around
• Compact wall-mounted design saves space
• Self-modulating technology adjusts energy use efficiently
• Supports up to two faucets with 1.56 GPM flow at 35°F rise
• Leak-proof cast aluminum heating chamber for durability

Current Price: $189.99

Rating: 4.2 (total: 655+)

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ThermoMate Mini Tank ES150B

If you’ve ever found yourself waiting forever for hot water at the kitchen sink or bathroom, this ThermoMate Mini Tank Water Heater is a handy little helper. It’s a compact 1.32-gallon tank designed to sit right under your sink, giving you instant hot water without the long wait or wasted water. Whether you’re rinsing dishes, washing hands, or prepping for a quick cleanup, it’s perfect for those small daily tasks or even as a booster alongside your main water heater. Installation is pretty straightforward — just plug it into a 120V outlet and connect it to your water line. Its small size means it fits nicely in tight spots, like cabinets or under counters, so you don’t have to sacrifice space. If you want quick, reliable hot water without a big setup, this little unit is worth considering.

What People Say

Users love how quickly this heater delivers hot water without the usual wait. It’s praised for being easy to install and perfect for tight spaces like under sinks. Many mention it’s a great solution for adding hot water to spots far from the main heater or for small households and RVs.

• Works great in my RV, plenty of hot water. It’s compact and heats up quickly, so I don’t have to wait long or waste water. Installation was simple, and it fits perfectly under the sink where space is tight.– Troy P.
• Simple to install and well made. It solved my problem of waiting forever for hot water because my main heater is far from the kitchen. Now I get hot water instantly, which makes a big difference in daily use.– Kindle Customer

Long-Term Cost Benefits

Because it only heats a small amount of water on demand and has foam insulation to keep heat in, you’re not wasting energy heating a large tank all day. This means lower electric bills compared to traditional large water heaters. Plus, its simple design keeps maintenance costs low over time.

Ease of Use

Maintenance Requirements

This unit is pretty low maintenance thanks to its enamel-coated glass-lined tank that helps prevent leaks and corrosion. Just keep an eye on the pressure relief valve and do a basic check every now and then to keep things running smoothly.

Durability

The gold porcelain lining inside the tank offers solid protection against rust and leaks, which means this little heater can hold up well over time. Many users report consistent performance without issues for months or even years.

Innovation

While it’s a straightforward mini tank design, the inclusion of foam insulation and a temperature & pressure relief valve adds safety and efficiency. The adjustable thermostat knob gives you control over your water temperature, which is a nice touch for a compact unit.

Energy Efficiency

With foam insulation and a small tank size, this heater minimizes standby heat loss. It only heats water when you need it, helping you save on electricity compared to larger, constantly heated tanks.

Problem Solving Ability

If you’ve been frustrated by waiting for hot water or wasting gallons while it heats up, this unit fixes that by providing instant hot water right at the source. It’s especially useful for sinks far from your main heater or in small spaces where a big tank won’t fit.

Key Benefits

• Instant hot water right where you need it
• Compact design fits under sinks or in small spaces
• Easy installation with a standard 120V plug
• Adjustable temperature from 68℉ to 140℉
• Gold porcelain-lined tank for better insulation and leak prevention

Current Price: $144.49

Rating: 4.4 (total: 144+)

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ThermoMate 14kW Tankless

If you’re tired of waiting for hot water or dealing with bulky tanks, the ThermoMate 14kW tankless water heater might be just what you need. It’s designed to give you instant hot water on demand, so no more wasting time or water while you wait. This unit is compact and wall-mounted, saving you floor space and fitting easily into tight spots like small bathrooms or office break rooms. It’s powerful enough to handle up to two faucets and a shower at once, with a flow rate of 2.66 gallons per minute at a 35°F temperature rise. Plus, the self-modulating technology means it only uses the energy necessary to heat your water, which can help lower your utility bills. Whether you want to upgrade your home’s hot water system or add a point-of-use heater somewhere, this model offers a solid mix of convenience and efficiency.

What People Say

People appreciate how quickly this heater delivers hot water and how easy it is to install. Many mention the space-saving design and the noticeable savings on their water heating bills. It’s often praised for steady, reliable temperature control without the usual hot-cold swings.

• This hot water heater works great. I like that it shows the temperature of the water coming out of the unit. Easy to install. Easy to use.– Pete Bedford
• I am so happy with my new under the counter hot water heater that was installed in my kitchen. I fully expect to see my water bill come down as I had to waste so much water just waiting for it to get hot at my sink. The unit only takes up a small amount of space in a cabinet and is so worth the cost to get hot water in just a few seconds. Thank you for a wonderful product!– Jean R

Long-Term Cost Benefits

Because it heats water only when you need it and adjusts power based on flow and temperature, this ThermoMate model can save you up to 60% on water heating costs compared to traditional tank heaters. Its leak-proof design also means fewer repairs and less maintenance over time, which adds up to more savings.

Ease of Use

Maintenance Requirements

Thanks to its cast aluminum heating chamber and separated heating element, this unit is designed to prevent leaks and scale buildup, which means you won’t have to spend much time on upkeep. Just a periodic check to ensure connections are tight should keep it running smoothly.

Durability

The use of a cast aluminum heating chamber and separation of the heating element from water lines helps protect against corrosion and leaks. Users report consistent performance over months with no issues, making it a reliable choice for long-term use.

Innovation

This model’s self-modulating technology is a smart feature that continuously adjusts energy use based on water flow and temperature, maximizing efficiency without sacrificing performance. It’s also one of the first to use a cast aluminum heating chamber to improve durability and prevent leaks.

Energy Efficiency

With 99% heating efficiency and the ability to modulate power based on demand, this heater cuts down on wasted energy. It only heats what you need, when you need it, which helps reduce your electric bill compared to traditional tank heaters that keep water hot all day.

Problem Solving Ability

If you’ve struggled with waiting for hot water or dealing with bulky, inefficient tanks, this ThermoMate unit solves those problems by delivering instant hot water on demand and fitting into small spaces. Its leak-proof design also helps avoid common issues like corrosion and scale buildup.

Key Benefits

• Instant hot water on demand with no waiting
• Compact, wall-mounted design saves floor space
• Self-modulating tech adjusts energy use for efficiency
• Supports multiple faucets and a shower simultaneously
• Leak-proof cast aluminum heating chamber for durability

Current Price: $249.99

Rating: 4.6 (total: 68+)

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ThermoMate Mini Tank ES700

If you’ve ever been frustrated waiting for hot water at your sink, this ThermoMate 6.5-gallon mini tank water heater is a handy little solution. It’s designed to sit right where you need it—under your sink or mounted on a wall—so you get instant hot water without the usual wait. The compact size means it won’t take up much space, and plugging it into a standard 120V outlet makes installation pretty straightforward. Whether you’re washing dishes, rinsing veggies, or just want a quick splash of hot water, this unit keeps things simple and efficient. Plus, with adjustable temperature settings and a freeze protection mode, it’s built to handle everyday use without fuss.

What People Say

Users love how quickly this mini tank delivers hot water and how easy it is to install without complicated wiring. Many mention that it’s a great space saver and appreciate the steady temperature control. It’s often praised for making everyday tasks like washing dishes or hands much more convenient.

• Super easy to install. Heats the water just as desired! Wish I had purchased this one sooner instead of the 2 cheap ones we tried. Highly recommended.– SaraKenny O’Dell
• I installed this on a bathroom sink at my shop. It looks a lot better than the old, round, metal one. It has so much more hot water!– David Butler

Long-Term Cost Benefits

Because this heater only warms a small tank of water right where you use it, you waste less water waiting for hot water to arrive. Its efficient insulation and adjustable temperature settings help keep energy use low, which can add up to savings on your electric bill over time. Plus, the durable build means fewer repairs or replacements down the road.

Ease of Use

Maintenance Requirements

Thanks to its glass-lined tank and included temperature and pressure relief valve, this unit doesn’t demand much upkeep. Just a quick check now and then to ensure everything’s tight and running smoothly should be enough to keep it in good shape.

Durability

The glass-lined tank and UL certification mean this heater is built to last. Users report it holds up well under regular use, with a sturdy design that resists corrosion and leaks over time.

Innovation

While it’s a straightforward mini tank design, the adjustable thermostat with freeze protection and high thermal efficiency (up to 99%) show thoughtful features that make it reliable and user-friendly for everyday use.

Energy Efficiency

With excellent insulation and the ability to keep water hot only in a small tank near the point of use, this heater reduces standby heat loss and energy waste compared to larger traditional tanks.

Problem Solving Ability

If you’re tired of running the tap forever waiting for hot water or dealing with bulky heaters in inconvenient spots, this mini tank solves those issues by delivering hot water instantly right where you need it, saving water and hassle.

Key Benefits

• Instant hot water right where you need it
• Compact design fits under sinks or on walls
• Simple plug-in installation with standard 120V outlet
• Adjustable thermostat with freeze protection
• Durable glass-lined tank with UL certification

Current Price: $229.99

Rating: 4.3 (total: 1,046+)

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ThermoMate Mini Tank ES250

If you’re fed up with waiting ages for hot water at your sink, the ThermoMate 2.5-gallon mini tank water heater is a neat little fix. It’s compact enough to fit right under your sink or mount on a wall, so you get hot water almost instantly without wasting time or water. Plugging it into a standard 120V outlet makes setup pretty straightforward, and the adjustable temperature range means you can dial in just the right warmth. Whether you’re rinsing dishes, washing hands, or need quick hot water for your RV or cabin, this unit keeps things simple and reliable without taking up much space.

What People Say

People really appreciate how quickly this mini tank delivers hot water without the usual wait. It’s praised for being easy to install and for saving space under the sink. Many users mention that it makes everyday tasks like washing dishes or hands much more convenient, especially in spots where the main water heater is far away.

• Super easy to install. Heats the water just as desired! Wish I had purchased this one sooner instead of the 2 cheap ones we tried. Highly recommended.– SaraKenny O’Dell
• So, you get up in the morning to wash up, and turn on the hot water tap. And wait for hot water. And wait. And finally give up because you’re out of time, and cringe at the freezing cold water. The problem is that many houses have the water heater out in the garage, and long supply tubing under the floor or up in the ceiling, running hundreds of feet to where the faucets are located. The hot water may be hot where the supply lines are connected to the tank, but it quickly cools down. So, to actually get hot water at a remote tap, you have to run all the cold water through the pipe, until the hot water eventually gets there. it’s frustrating, and it wastes thousands of gallons each year. Yes, you could install a very expensive water circulation system, but they rarely work as advertised. The more practical solution is to install a small water heater under each sink, close to the tap. It’s a lot cheaper to keep a couple gallons of water hot under the sink than to waste cold water waiting for the hot stuff to get there. The advantage of a small 115-volt water heater is that it doesn’t need big wires. You can power it from a nearby 15-amp receptacle. When you open the hot water faucet at the sink, the already-hot water comes directly from the under-sink tank, so it only takes a second or two to get hot water. Nice. I connect the tank water supply to the existing “hot” water line, then connect the tank outlet to the hot water faucet. The cold water supply stays as is. Flexible braided hoses are available with the appropriate ends, in a variety of lengths. I use a pressure relief valve on top of the tank to meet local code, and set the tank in a rectangular aluminum or stainless steel baking pan to collect any errant water trying to do a runner. I like the Thermomate series because they are well-insulated, and the exterior cover provides a clean, stylish shape under the sink. I have a two-gallon tank under the bathroom sink, and a four-gallon tank under the kitchen sink because it supplies both the kitchen faucet and the dishwasher. The price is appropriate, and although I have no reason to suspect any reliability issues, if a tank did leak it would be cheap and easy to replace.– Hardly B

Long-Term Cost Benefits

Since this heater keeps a small amount of water hot right where you use it, you waste less water running taps waiting for heat. Its thick insulation helps keep energy use low, which can save you money on electricity over time. Plus, the sturdy build means you’re less likely to deal with repairs or replacements anytime soon.

Ease of Use

Maintenance Requirements

Thanks to its glass-lined tank and included temperature and pressure relief valve, this heater doesn’t need much upkeep. Just an occasional check to make sure everything’s tight and running smoothly should keep it in good shape.

Durability

With a triple-layer tank and porcelain enamel lining, this unit stands up well to corrosion and leaks. Users report it holds up nicely over time, backed by UL certification and a solid warranty.

Innovation

While it’s a simple mini tank design, the use of an Incoloy 800 stainless steel heating element and thick insulation shows some smart engineering to boost efficiency and lifespan.

Energy Efficiency

The thick 30mm polyurethane insulation and efficient heating element help reduce heat loss, so you’re not wasting energy keeping water hot when you don’t need it.

Problem Solving Ability

If you’re tired of running the tap forever waiting for hot water or dealing with bulky heaters in awkward spots, this mini tank delivers hot water instantly right where you want it, saving water and hassle.

Key Benefits

• Instant hot water right where you need it
• Compact size fits easily under sinks or on walls
• Plug-in installation with standard 120V outlet
• Adjustable temperature from 50°F to 149°F
• Durable, corrosion-resistant glass-lined tank

Current Price: $179.99

Rating: 4.3 (total: 1,046+)

Buy Now

Frequently Asked Questions

How Do I Choose The Right Thermomate Water Heater For My Home?

When selecting a Thermomate water heater, you want to consider your household’s hot water needs and the installation location. If you need instant hot water at a single point like a kitchen sink or bathroom, a compact tankless model such as the 8kW or 11kW units will save space and energy. For slightly larger demands or multiple fixtures, the 14kW tankless or mini tank models with 4 to 6.5 gallons capacity might be better. Also, check your home’s electrical capacity since some models require 240 volts and higher amperage. Think about flow rate too—if you want to run multiple taps simultaneously, pick a model with a higher gallons-per-minute rating. Finally, consider ease of installation; some units plug into standard outlets, while others need professional wiring. Matching these factors to your usage will help you find the best fit.

Are Thermomate Water Heaters Energy Efficient And Easy To Maintain?

Yes, Thermomate water heaters are designed with energy efficiency in mind. The tankless models use self-modulating technology that adjusts power based on demand, so you’re not wasting electricity heating water you’re not using. Mini tank models keep a small volume of water hot, reducing the wait time and water waste. Maintenance is generally minimal since many units feature leak-proof and corrosion-resistant components. You won’t need batteries or frequent servicing, but it’s a good idea to check pressure relief valves and ensure proper installation to avoid leaks. Overall, you’ll likely see savings on your energy bills compared to traditional tank heaters, especially if you use hot water intermittently.

Can I Install A Thermomate Water Heater Myself, And What Should I Know About Usage?

If you’re comfortable with basic plumbing and electrical work, some Thermomate models are DIY-friendly, especially the mini tanks that plug into standard 120V outlets. However, tankless models running at 240 volts often require a licensed electrician for safe installation due to higher amperage and wiring complexity. Always follow local codes and manufacturer instructions. When using your water heater, keep in mind that tankless units need a minimum flow rate to activate heating, so very high flow can reduce water temperature. You might need to adjust your faucet flow or install flow restrictors for optimal performance. Also, setting the temperature around 120°F is usually safe and energy-efficient. With proper installation and usage, you’ll enjoy near-instant hot water and reduced water waste.

Wrapping Up

By reviewing these seven Thermomate water heaters, you can find a solution tailored to your home’s size, hot water needs, and budget. Whether you want instant hot water with a tankless model or prefer the simplicity of a mini tank under your sink, Thermomate offers reliable and efficient options. Choosing the right water heater can save you time, reduce water waste, and lower your energy bills, making your daily routines more comfortable and convenient.

Product	Image	Rating	Highlights	Pros	Cons	Price
ThermoMate Tankless Water Heater Electric, 11kW		4.6/5 (1000+ reviews)	On-demand instant hot water, self-modulating, energy-saving.	Compact design, easy installation, consistent temperature.	Requires adequate electrical supply.	$219.99
ThermoMate Mini Tank Water Heater Electric, ES400B		4.4/5 (144 ratings)	4-gallon capacity, under-sink installation, pressure release valve.	Instant hot water, easy to install.	Short power cable.	$169.99
ThermoMate Tankless Water Heater Electric, 8kW		4.2/5 (655 ratings)	Self-modulating, leak-proof heating chamber.	Compact, efficient for small spaces.	Lower flow rate.	$189.99
ThermoMate Tankless Water Heater Electric, 14kW		4.6/5 (68 ratings)	Instant heating, high flow rate.	Great for showers, efficient.	Requires professional installation.	$249.99
ThermoMate Electric Tank Water Heater, 6.5 Gallons		4.3/5 (1046 ratings)	Corrosion-resistant tank, wall or floor mounted.	Good capacity, easy to use.	Takes up more space.	$229.99
ThermoMate Electric Mini Tank Water Heater, 2.5 Gallons		4.3/5 (1046 ratings)	UL certified, compact design.	Ideal for small spaces, quick heating.	Limited capacity.	$179.99
ThermoMate Mini Tank Water Heater Electric, ES150B		4.4/5 (144 ratings)	1.3-gallon capacity, easy installation.	Compact, efficient for small needs.	Limited hot water supply.	$144.49

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