2 Best Thermomate 14 kW Tankless Water Heaters, Compared
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Finding the best thermomate 14 kW tankless water heaters requires checking the specs on each listing. We compared 2 models to help you choose. The Thermomate 14 kW Cast Aluminum Tankless Water Heater ranks first because its 13.7-pound weight and compact 12.8-inch width make it ideal for bathroom or point-of-use applications. These picks are based strictly on published specifications. This guide helps you decide which unit fits your electrical capacity and space constraints.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Thermomate 14 kW Cast Aluminum Tankless Water Heater Best overall | Bathroom or point-of-use applications | Check price of Thermomate 14 kW Cast Aluminum Tankless Water Heater on Amazon |
| 2 | ThermoMate 14kW Electric Tankless Water Heater Best budget | small indoor spaces with strong electrical capacity | Check price of ThermoMate 14kW Electric Tankless Water Heater on Amazon |
The best fit for you
- You need the most compact indoor unit ThermoMate 14kW Electric Tankless Water Heater It measures 11.2 inches wide and 15.9 inches tall for tight spaces.
- You want the best overall performance Thermomate 14 kW Cast Aluminum Tankless Water Heater This model offers precise temperature control and a compact footprint for bathrooms.
- You require a lightweight installation option ThermoMate 14kW Electric Tankless Water Heater Weighing only 13 pounds, it is easier to mount than the heavier alternative.
Our 2 picks
Thermomate 14 kW Cast Aluminum Tankless Water Heater
Best for: Bathroom or point-of-use applications
- Wattage
- 14 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 3.4 GPM
- Installation Location
- Indoor
- Voltage
- 240V
- Temperature Control
- 86°F–131°F
View on Amazon: Thermomate 14 kW Cast Aluminum Tankless Water Heater Affiliate link
This ThermoMate 14 kW unit delivers up to 3.4 GPM of hot water at 240 volts. It features a cast aluminum heating chamber and electronic controls adjustable in 1-degree increments from 86 to 131°F. The compact design measures 15.4 x 12.8 x 12.8 inches and weighs 13.7 pounds. It suits small households or point-of-use applications requiring efficient, endless hot water without a storage tank.
Pros
- 14 kW power supports up to 3.4 GPM flow
- Electronic temperature control with 1°F increments
- Cast aluminum heating chamber resists scale and corrosion
- ETL certified for safety and compliance
Cons
- Requires a 60-amp double-pole breaker and 6AWG wiring
- Maximum flow rate drops significantly in colder inlet temperatures
- No digital display or remote control mentioned in specifications
Good fit if
- You need a compact unit for a bathroom or small sink
- You have the electrical capacity for a 60-amp circuit
- You want precise temperature adjustments in 1-degree steps
Skip if
- You require a higher flow rate for multiple simultaneous showers
- You cannot install a 240-volt, 60-amp electrical circuit
- You prefer a unit with a built-in digital display
Verdict: ThermoMate 14kW Electric Tankless Heater is a solid choice for users with adequate electrical infrastructure who need precise temperature control and a compact footprint for low-to-medium flow demands.
ThermoMate 14kW Electric Tankless Water Heater
Best for: small indoor spaces with strong electrical capacity
- Wattage
- 14 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 3.4 GPM
- Installation Location
- Indoor
- Voltage
- 240 V
- Temperature Control
- 86°F to 131°F
View on Amazon: ThermoMate 14kW Electric Tankless Water Heater Affiliate link
This Thermomate unit delivers up to 3.4 GPM of hot water using 14 kW of power at 240 volts. It features a touch control interface and a compact 15.9 x 11.2 x 3 inch design. The device is ETL listed for indoor installation. It suits small households needing simultaneous supply for one or two fixtures while prioritizing space efficiency and safety certifications.
Pros
- Provides up to 3.4 GPM flow rate
- Compact 15.9 x 11.2 x 3 inch dimensions
- ETL listed for North American safety standards
- Touch control interface for temperature adjustment
Cons
- Requires a dedicated 60 Amp circuit breaker
- Limited to indoor installation only
- Heavy-duty cast aluminum element may scale over time
Good fit if
- You need a compact unit for a small apartment
- You have the electrical capacity for a 60 Amp breaker
- You require ETL certification for indoor safety
Skip if
- You need outdoor installation capability
- Your electrical panel cannot support a 60 Amp double-pole breaker
- You require gas fuel type for higher flow rates
Verdict: Thermomate 14 kW Indoor Electric Heater fits users with limited space and adequate electrical infrastructure who prioritize certified indoor safety and compact dimensions over outdoor versatility.
Specifications side by side
| Spec | Thermomate 14 kW Cast Aluminum Tankless Water Heater | ThermoMate 14kW Electric Tankless Water Heater |
|---|---|---|
| Fuel Type | Electric | Electric |
| Flow Rate | 3.4 GPM | 3.4 GPM |
| Wattage | 14 kW | 14 kW |
| Installation Location | Indoor | Indoor |
| Voltage | 240V | 240 V |
| Temperature Control | 86°F–131°F | 86°F to 131°F |
| Certification | ETL, UL-499, CAN/CSA-C22.2 No. 64 | ETL |
| Dimensions | 15.4 x 12.8 x 12.8 in | 15.9" x 11.2" x 3" |
| Weight | 13.7 pounds | 13 pounds |
| Color | Gray | Gray |
| Model | ET140 | EH140 |
How to Choose the Right Model
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Match Fuel and Voltage
Both models in this guide run on 240V electric power. You must verify your home has a dedicated 240V circuit capable of handling the load. Electric units require specific wiring and breaker setups. If your electrical panel lacks the capacity, you will need an upgrade before installation. Check your breaker box details first. This ensures safe operation and prevents tripping issues. The Thermomate 14 kW units are strictly electric, so gas lines are not an option. Plan your electrical work carefully to support the wattage.
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Select Indoor or Outdoor Use
The EH140 model is rated for indoor installation only. It features certified safety standards for enclosed spaces. The ET140 model is designed for bathroom or point-of-use applications, which often implies outdoor or semi-outdoor durability. You should choose the EH140 if you are installing in a utility closet or basement. Choose the ET140 if you need a unit that can withstand ambient conditions in a garage or exterior wall. Your installation location dictates which model fits your safety and building code requirements.
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Check Physical Dimensions
Space constraints often drive the final decision. The EH140 measures 11.2 inches wide and 15.9 inches tall. It is the narrower option for tight cabinets. The ET140 is wider at 12.8 inches but slightly shorter at 15.4 inches. Measure your available wall space carefully. Ensure you have clearance for plumbing connections and electrical access. The compact footprint of both units makes them suitable for small apartments or under-sink installations. Compare the width and height against your specific mounting area to ensure a proper fit.
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Consider Installation Weight
Weight affects mounting stability and ease of installation. The EH140 weighs 13 pounds, making it lighter and easier to handle. The ET140 weighs 13.7 pounds, which is still manageable for most installers. Heavier units may require more robust mounting hardware or additional support brackets. Ensure your wall can support the static load. Lighter models are easier to maneuver into tight spaces. Consider the weight when planning the lift and secure attachment. Both units are relatively light compared to traditional tank heaters, simplifying the mounting process.
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Identify Primary Use Case
Determine where you will use the heated water. The ET140 is best for bathroom or point-of-use applications. It provides precise temperature control for sinks or showers. The EH140 is ideal for small indoor spaces with strong electrical capacity. It prioritizes certified indoor safety. If you need hot water for a single sink, the point-of-use model is efficient. For whole-house or larger indoor setups, consider the indoor-rated unit. Your specific usage scenario will guide you toward the correct model for your needs.
Frequently asked questions
Which Thermomate 14 kW heater is best for indoor use?
The ThermoMate 14kW Electric Tankless Water Heater (model EH140) is the best indoor option. It is designed specifically for small indoor spaces with strong electrical capacity. Its compact dimensions of 11.2 inches wide and 15.9 inches tall make it suitable for tight installations. It weighs just 13 pounds for easy mounting.
How wide is the Thermomate 14 kW Cast Aluminum heater?
The Thermomate 14 kW Cast Aluminum Tankless Water Heater (model ET140) is 12.8 inches wide. It also measures 12.8 inches in length and 15.4 inches in height. This compact footprint makes it ideal for bathroom or point-of-use applications where space is limited but reliable hot water is needed.
What is the difference between the ET140 and EH140 models?
The ET140 is the Best overall pick, featuring a cast aluminum build and weighing 13.7 pounds. It suits bathroom or point-of-use applications. The EH140 is the Best indoor pick, weighing 13 pounds. It is optimized for small indoor spaces with strong electrical capacity. Both use 14 kW electric power.
Does the Thermomate 14 kW heater require 240V power?
Yes, both listed Thermomate 14 kW models require 240V power. You must verify your home has the necessary electrical infrastructure before purchasing. Electric units need specific wiring and breaker setups. Ensure your circuit can handle the load to prevent tripping or damage to the unit during operation.
Which model is lighter for wall mounting?
The ThermoMate 14kW Electric Tankless Water Heater (model EH140) is the lighter option at 13 pounds. The Thermomate 14 kW Cast Aluminum Tankless Water Heater (model ET140) weighs 13.7 pounds. Both are relatively lightweight, but the EH140 offers a slight advantage for users prioritizing minimal mounting weight.
Is the Thermomate 14 kW heater suitable for bathrooms?
Yes, the Thermomate 14 kW Cast Aluminum Tankless Water Heater (model ET140) is rated best for bathroom or point-of-use applications. It provides precise temperature control and a compact footprint. The EH140 is also suitable for indoor spaces, including bathrooms, provided you have adequate electrical capacity and indoor safety certifications.
What color are these Thermomate water heaters?
Both the Thermomate 14 kW Cast Aluminum Tankless Water Heater (ET140) and the ThermoMate 14kW Electric Tankless Water Heater (EH140) are gray. This neutral color helps them blend into most utility areas or bathrooms. The finish is consistent across both the cast aluminum and standard electric indoor models.