How many showers can an 18kW unit run at once?

It depends on your incoming water temperature and flow rate. In warm climates 18kW can often handle two showers at once; in cold climates it may only manage one at a time. Add up the flow of the fixtures you want to run together and check the unit's temperature-rise rating.

What electrical setup does it need?

It runs on 240V and draws high current at 18kW, so it needs dedicated circuits sized for that load and enough capacity in your electrical panel. A licensed electrician should confirm the panel and wiring before install.

Does it need venting like a gas tankless heater?

No. It is electric, so there is no gas line, flue or venting. It does need clearance for air circulation and access for wiring and plumbing.

Will it lower my energy bills?

It avoids the standby heat loss of a tank, and self-modulating control draws only what the demand needs. Actual savings depend on your usage, incoming water temperature and local electric rates.

Can I install it myself?

Most homeowners should not. The high-current 240V wiring, plumbing connections and permits usually call for a licensed electrician and plumber.

How do I set the temperature?

You set the target temperature on the digital LED display, and the unit modulates power to hold it. Real-time outlet temperature depends on flow rate and incoming water temperature.

GARVEE High Efficiency Tankless Electric Water Heater 18kW, 240V

Best price now

$173.49at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

GARVEE High Efficiency Tankless Electric Water Heater 18kW, 240V

Best price now

$173.49at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Price facts

Last seen at $173.49 at Walmart on Nov 9.

Our take on the GARVEE High Efficiency Tankless Electric Water Heater 18kW, 240V

The GARVEE 18kW is a 240V electric tankless water heater that mounts on a wall and heats water on demand, so there is no tank to run out. At 18kW it suits a whole-house load in a small to mid-size home or a large apartment, though the number of fixtures it can run at once depends on your incoming water temperature and the breaker capacity you have. It uses self-modulating power control, a stainless steel and iron enclosure, and a digital LED display for setting temperature. Against gas tankless units it needs no venting, but it draws high current and usually needs dedicated 240V circuits and a licensed install.

Best forSmall to mid-size homes replacing a tank heaterApartments and condos without gas or ventingWall-mount installs where floor space is tightHouseholds wanting on-demand hot water with no standby tank loss

Pros

Heats on demand with no tank to run out
Self-modulating power control adjusts draw to demand
Stainless steel and iron enclosure resists corrosion
Digital LED display for setting and reading temperature
Compact wall-mount profile frees floor space
No gas line or venting needed

Cons

18kW needs heavy dedicated 240V circuits and a large service panel
Output and fixture count depend on incoming water temperature
Electric tankless installs often require an electrician and permits
Hard water can scale the heating elements over time

GARVEE High Efficiency Tankless Electric Water Heater 18kW, 240V prices at every store

WalmartNew
In stockSold by GarveeReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$173.49Free shippingChecked Nov 9
Visit Walmart

About the GARVEE High Efficiency Tankless Electric Water Heater 18kW, 240V

This is an 18 kW, 240V electric tankless water heater. It heats water on demand instead of storing it in a tank.

It uses self-modulating technology that adjusts power use to demand, with energy efficiency of up to 99.8%. The enclosure is stainless steel and iron, which resists corrosion.

A digital LED display shows the water temperature and lets you set it. The compact unit mounts on the wall, which keeps floor space free.

Type: Electric tankless water heater
Power: 18 kW
Voltage: 240V
Efficiency: Up to 99.8% with self-modulating technology
Material: Stainless steel and iron enclosure
Display: Digital LED temperature display
Installation: Wall-mount

Specifications

color: OtherSource
actual_color: 18KWSource

Questions and answers

How many showers can an 18kW unit run at once?: It depends on your incoming water temperature and flow rate. In warm climates 18kW can often handle two showers at once; in cold climates it may only manage one at a time. Add up the flow of the fixtures you want to run together and check the unit's temperature-rise rating.
What electrical setup does it need?: It runs on 240V and draws high current at 18kW, so it needs dedicated circuits sized for that load and enough capacity in your electrical panel. A licensed electrician should confirm the panel and wiring before install.
Does it need venting like a gas tankless heater?: No. It is electric, so there is no gas line, flue or venting. It does need clearance for air circulation and access for wiring and plumbing.
Will it lower my energy bills?: It avoids the standby heat loss of a tank, and self-modulating control draws only what the demand needs. Actual savings depend on your usage, incoming water temperature and local electric rates.
Can I install it myself?: Most homeowners should not. The high-current 240V wiring, plumbing connections and permits usually call for a licensed electrician and plumber.
How do I set the temperature?: You set the target temperature on the digital LED display, and the unit modulates power to hold it. Real-time outlet temperature depends on flow rate and incoming water temperature.
Where is the GARVEE High Efficiency Tankless Electric Water Heater 18kW, 240V cheapest?: At Walmart, for $173.49, as of our latest check.
What do buyers say about the GARVEE High Efficiency Tankless Electric Water Heater 18kW, 240V?: Rated 4.4 out of 5 from 8 ratings.