How much power does a 27kW tankless heater need?

27kW at 240V draws about 112 amps, so it needs multiple dedicated circuits and a service panel sized for it. Confirm capacity with a licensed electrician before buying.

Can it run a whole house or just one shower?

At full output it can supply a whole house in mild climates, but cold inlet water in winter lowers flow. In cold regions, plan it for one or two points of use.

Does it need a tank or venting?

No tank and no venting. It mounts on the wall and heats water as it flows, which is why it takes up little space.

What maintenance does it need?

Clean the inlet filter and showerhead regularly to keep flow steady. Drain all water if the unit sits unused in winter to prevent freeze damage.

Is professional installation required?

Practically, yes. The high current draw and plumbing connections make a licensed electrician and plumber the safe route, even though accessories and instructions are included.

VEVOR Tankless Electric Water Heater, 27kW Instant Hot Water Heater Under Sink

Best price now

$251.91at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

VEVOR Tankless Electric Water Heater, 27kW Instant Hot Water Heater Under Sink

Best price now

$251.91at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

VEVOR discount codes →

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 $251.91 at Walmart on Nov 9.

Our take on the VEVOR Tankless Electric Water Heater, 27kW Instant Hot Water Heater Under Sink

The VEVOR 27kW tankless electric water heater is a compact, wall-mounted unit that heats water on demand with die-cast aluminum heating elements instead of a storage tank. It is built for whole-home or multi-point use where a large electrical service is available, and its small footprint suits tight utility spaces. The child-lock control and rust-resistant internal parts are practical touches. Against premium brands it is a budget option with fewer smart features and a shorter track record, so professional installation and a load check matter more here.

Best forWhole-home hot water in mild climatesReplacing a tank in a tight utility spaceHouseholds with a large electrical serviceMulti-bathroom homes needing high output

Pros

27kW output handles simultaneous hot water draws
Die-cast aluminum heating with separated water and electrical paths
Compact wall-mount design saves floor space
Child lock prevents accidental temperature changes
Rust-resistant parts resist scale and corrosion
Ships with installation accessories and instructions

Cons

27kW draws very high current and needs heavy dedicated wiring
No temperature display or smart controls
Cold inlet water slows output in winter
Must be drained if left unused in freezing weather
Professional installation is effectively required

VEVOR Tankless Electric Water Heater, 27kW Instant Hot Water Heater Under Sink prices at every store

WalmartNew
In stockSold by VEVOR Distribution StoreReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$251.91Free shippingChecked Nov 9
Visit Walmart

About the VEVOR Tankless Electric Water Heater, 27kW Instant Hot Water Heater Under Sink

This is a 27kW electric tankless water heater that heats water on demand. It uses a die-cast aluminum heater that keeps the water and the electricity separate during heating. The unit holds a constant temperature, and the rust-resistant parts help prevent rust and scale buildup.

The heater is compact and mounts on the wall. It has a lock to prevent accidental touches and incorrect temperature changes. It suits family bathrooms, public restrooms and barbershops. A full set of installation accessories and instructions comes with it.

If the unit won't be used during the winter, drain all the water to keep the heater from freezing. Clean the inlet filter and showerhead regularly so water flows smoothly.

Model: JN27
Power: 27kW
Voltage: AC 240V
Temperature range: 30-60℃ / 86-140℉
Minimum flow: 1.5±0.3 L/min to start
Pipe connection: 3/4" NPT
Material: ABS 5VA
Heater type: Die-cast aluminum
Dimensions: 18.86 x 11 x 4 in / 470 x 278 x 100 mm
Weight: 13.56 lbs / 6.15 kg
Color: Black
Mounting: Wall-mounted
In the box: 1 electric tankless water heater, 3 screws, 1 filter, 2 flat washers, 3 rubber connectors, 1 user manual

Specifications

color: BlackSource

Questions and answers

How much power does a 27kW tankless heater need?: 27kW at 240V draws about 112 amps, so it needs multiple dedicated circuits and a service panel sized for it. Confirm capacity with a licensed electrician before buying.
Can it run a whole house or just one shower?: At full output it can supply a whole house in mild climates, but cold inlet water in winter lowers flow. In cold regions, plan it for one or two points of use.
Does it need a tank or venting?: No tank and no venting. It mounts on the wall and heats water as it flows, which is why it takes up little space.
What maintenance does it need?: Clean the inlet filter and showerhead regularly to keep flow steady. Drain all water if the unit sits unused in winter to prevent freeze damage.
Is professional installation required?: Practically, yes. The high current draw and plumbing connections make a licensed electrician and plumber the safe route, even though accessories and instructions are included.
Where is the VEVOR Tankless Electric Water Heater, 27kW Instant Hot Water Heater Under Sink cheapest?: At Walmart, for $251.91, as of our latest check.
What do buyers say about the VEVOR Tankless Electric Water Heater, 27kW Instant Hot Water Heater Under Sink?: Rated 4.8 out of 5 from 4 ratings.