How much power does a 27 kW tankless heater draw?

At full output it draws roughly 112 amps at 240 volts, which is why it is normally split across several dedicated circuits. Most homes need a large electrical service and spare panel capacity.

Can it run a shower and a sink at the same time?

Yes, 27 kW is enough for simultaneous fixtures in most cases. Actual hot water flow depends on the incoming water temperature, so cold climates reduce how much it can heat.

No. Electric tankless heaters produce no combustion gases, so they need no flue or venting, unlike gas models.

What is the child lock for?

The child lock prevents accidental changes to the temperature setting on the touch panel. It does not affect water flow or heating.

Is it worth it over a tank heater?

It saves wall space and avoids standby losses, and it never runs out of hot water from a tank. The trade-off is a higher installation cost, often including electrical work.

Unbranded

27kW Tankless Electric Water Heater with Instant Hot Flow

Best price now

$271.01at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

Unbranded

27kW Tankless Electric Water Heater with Instant Hot Flow

Best price now

$271.01at 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 $271.01 at Walmart on Nov 9.

Our take on the 27kW Tankless Electric Water Heater with Instant Hot Flow

A whole-house electric tankless water heater rated at 27 kW, with an LCD touch panel and a child lock. It heats water on demand instead of storing it in a tank, so it takes up little wall space and never runs a tank cold. The 27 kW rating is high for an electric unit and can serve multiple fixtures at once, but it draws a heavy current and usually needs several dedicated circuits and a large electrical service. Electric tankless units like this cost more to install than a tank heater but avoid standby heat loss and last longer.

Best forWhole-house hot water in mild climatesHouseholds replacing a failing tank heaterWall-space-limited utility roomsHomes with spare electrical capacity

Pros

On-demand heating with no tank to run cold
Compact wall-mounted footprint
LCD touch controls with child lock
27 kW output suits simultaneous fixtures
No standby heat loss from a stored tank

Cons

Very high electrical draw; needs multiple circuits
Professional installation is usually required
May need a service panel upgrade
Output depends on incoming water temperature

27kW Tankless Electric Water Heater with Instant Hot Flow prices at every store

WalmartNew
In stockSold by Tte furnitureReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$271.01+ $50.00 shippingChecked Nov 9
Visit Walmart

About the 27kW Tankless Electric Water Heater with Instant Hot Flow

This is a 27 kW tankless electric water heater that provides instant hot water flow. It has an LCD touch display and a child lock.

Power: 27 kW
Heat output: 27,000 BTU
Type: Tankless electric water heater
Display: LCD touch
Safety: Child lock
Color: Black

Specifications

btu: 27000Source
color: BlackSource

Questions and answers

How much power does a 27 kW tankless heater draw?: At full output it draws roughly 112 amps at 240 volts, which is why it is normally split across several dedicated circuits. Most homes need a large electrical service and spare panel capacity.
Can it run a shower and a sink at the same time?: Yes, 27 kW is enough for simultaneous fixtures in most cases. Actual hot water flow depends on the incoming water temperature, so cold climates reduce how much it can heat.
Does it need a vent?: No. Electric tankless heaters produce no combustion gases, so they need no flue or venting, unlike gas models.
What is the child lock for?: The child lock prevents accidental changes to the temperature setting on the touch panel. It does not affect water flow or heating.
Is it worth it over a tank heater?: It saves wall space and avoids standby losses, and it never runs out of hot water from a tank. The trade-off is a higher installation cost, often including electrical work.
Where is the 27kW Tankless Electric Water Heater with Instant Hot Flow cheapest?: At Walmart, for $271.01, as of our latest check.