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Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series
18 kW Electric Tankless Water Heater
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers - Energy Guide
Airthereal Electric Tankless Water Heater 18kW, 240Volts -  Endless, on-demand hot water - Provide endless hot water on demand with no preheating & temperature fluctuations
Airthereal Electric Tankless Water Heater 18kW, 240Volts -  Save 50% on water heating costs - The self-modulating temperature technology only uses electricity to heat up water while you are using it
Airthereal Electric Tankless Water Heater 18kW, 240Volts - High Temperature Protection - Dry Heating Protection - Electrical Discharge Protection - Corrosion-Proof Parts
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers - Simple Control Operation
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series
18 kW Electric Tankless Water Heater
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers - Energy Guide
Airthereal Electric Tankless Water Heater 18kW, 240Volts -  Endless, on-demand hot water - Provide endless hot water on demand with no preheating & temperature fluctuations
Airthereal Electric Tankless Water Heater 18kW, 240Volts -  Save 50% on water heating costs - The self-modulating temperature technology only uses electricity to heat up water while you are using it
Airthereal Electric Tankless Water Heater 18kW, 240Volts - High Temperature Protection - Dry Heating Protection - Electrical Discharge Protection - Corrosion-Proof Parts
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers - Simple Control Operation
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series
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18 kW Electric Tankless Water Heater

Regular price $299.99 $239.99

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What Is a Tankless Water Heater?
A tankless water heater heats up water on demand instead of storing heated water in a storage tank. Due to the short heating time, tankless water heaters are perfect for cooking areas, additional bathrooms, or any place where water needs to be used at any time. Also, because of its rapid heating and small size, our tankless water heaters are 90% smaller than traditional water heaters.
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What Is a Tankless Water Heater?
A tankless water heater heats up water on demand instead of storing heated water in a storage tank. Due to the short heating time, tankless water heaters are perfect for cooking areas, additional bathrooms, or any place where water needs to be used at any time. Also, because of its rapid heating and small size, our tankless water heaters are 90% smaller than traditional water heaters.
How are “Traditional” Tank Storage Water Heaters Different?
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Tankless Water Heater
Size
Less space to install
Power Supply
8kW-27kW
Performance
Unlimited hot water
Energy Use
Only heats water on demand
Installation
Can be installed as long as the cold and hot water pipe channels are arranged in advance.
Cleaning & Maintenance
Non-scaling, so no special maintenance is required.
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Tank Water Heater
Size
Need quite a bit of room to install
Power Supply
1.5kW-3kW
Performance
Only holds a set amount of hot water
Energy Use
Holds heated water all-day
Installation
Needs to be installed on the load-bearing wall.
Cleaning & Maintenance
Must flush tank twice a year to remove sediment and mineral scale.
Endless Hot Water
Compact Size
Saves Money
Safe to Use
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Endless, on-demand hot water
Endless, on-demand hot water
Provide endless hot water on demand with no preheating or sudden temperature fluctuations.
Airthereal
Endless, on-demand hot water
Provide endless hot water on demand with no preheating or sudden temperature fluctuations.
Save 50% on water heating costs
The self-modulating temperature technology only uses energy to heat up water while you are using it.
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Safe Hot Water Supply
High Temperature Protection
Dry Heating Protection
Electrical Discharge Protection
Corrosion-Proof Parts
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Simple Control Operation
Power On/Off
Decrease/Down
Increase/Up
Standby mode
Heating mode
Excessive water flowp
Malfunction Codes
Electricity leakage
Temperature exceed 131°F/55°C
Temperature sensor failure
Dry heating (no water)
Check your unit capacity
Match your location color on the map to the corresponding chart below to determine unit capacity.Airthereal Electric Tankless Water Heater 18kW, set the outlet temp. 108°F:
STEP 1
Determine your average inlet water temperature by finding your location on the map and noting the color.
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STEP 2
Determine how many applications your tankless water heater can run simultaneously by matching your color to the table above.
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STEP 3
Check that you can meet the installation specifications and requirements for the model of tankless heater you selected.
Product Requires:
  • 2 x 40 AMP Breaker
  • 2 x (8AWG/2) Wires
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FAQ

How to choose the right electric tankless water heater?

The water heater’s power is measured in kilowatts (kW), which usually refers to the power of the electric heating tube in the water heater. The greater the power, the more heat is generated. This means less heating time is required and there is a higher load on the wire.

The power of common water heaters on the market are 6.5kW, 9kW, 14kW, 18kW, etc.

When purchasing an electric tankless water heater, you can choose your preferred power level for what you need, the number of faucets, and the water consumption habits.

Normally, the climate in the south is warmer and the requirements for the heat load ( power) of the water heater are lower. From an economic point of view, 14kW water heaters can meet the requirements of comfortable bathing. Meanwhile, in the north, the water temperature is lower, especially in winter when the heat load ( power) of the water heater is required to be large enough to meet the requirements of comfortable bathing, so families in the north should choose an 18kW water heater.

If you have multiple showers, choose a high-power capacity water heater or try to install multiple water heaters.

Click here to learn how to choose the right electric tankless water heater.

Is hot water from the water heater safe to drink?

Please DO NOT directly drink the water from the water heater. The water from the faucets must have drinking water quality and untreated plumbing might have a bacteria risk, thus it is well advised to not use heated water for drinking.

Will one tankless water heater be enough to heat my entire house?

Yes. You must choose the proper model to suit your home’s hot water needs, which is based upon the maximum flow of hot water you need at any one time. You can buy tankless water heaters that are capable of handling one shower at a time and others that can sustain a maximum of two showers operating at the same time.

Specification

Model

Voltage

Power

Min. Required Circuit Breaker Size

Max. Amperage

Recommended Wire Size

Min. Water Flow

Safe Operating Pressure

Water Connections

Installation

Temperature Setting

Dimensions (LxWxH)

Weight

EVT-8K

EVT-9K

EVT-14K

EVT-18K

EVT-27K

240 V

240 V

240 V

240 V

240 V

8 KW

9 KW

14 KW

18 KW

27 KW

40 AMP

40 AMP

60 AMP

2 x 40 AMP

3 x 40 AMP

33.3 A

37.5 A

58 A

75 A

113 A

8 AWG

8 AWG

6 AWG

2 x (8AWG/2)

3 x (8AWG/2)

0.475 GPM / 1.8 L/min

0.475 GPM / 1.8 L/min

0.475 GPM / 1.8 L/min

0.475 GPM / 1.8 L/min

0.475 GPM / 1.8 L/min

7.25 PSI - 108.78 PSI

7.25 PSI - 108.78 PSI

7.25 PSI - 108.78 PSI

7.25 PSI - 108.78 PSI

7.25 PSI - 108.78 PSI

½’’ NPT

½’’ NPT

½’’ NPT

¾’’ NPT

¾’’ NPT

Wall-Mounted

Wall-Mounted

Wall-Mounted

Wall-Mounted

Wall-Mounted

Digital Panel

Digital Panel

Digital Panel

Digital Panel

Digital Panel

13.1 x 8.1 x 2.6

16.1 x 9.9 x 2.6

15.9 x 11.1 x 2.9

17.3 x 12.2 x 3.4

17.3 x 12.2 x 3.4

6.6 lbs

8.8 lbs

12.8 lbs

16.1 lbs

19.2 lbs

Package Includes
No additional parts needed
  • Tankless Water Heater x 1
  • Mounting Hook x 2
  • Wall Plug x 4
  • Screw x 4
  • User Manual x 1
  • Gasket x 1
  • Filter x 1
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