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Mizudo
Mizudo 18kW 240V Electric Tankless Water Heater

Mizudo 18kW 240V Electric Tankless Water Heater

Best price now

$99.99at eBayChecked Nov 9

67% under what the other stores charge

Compared across 4 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

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Price facts

  • Last seen at $99.99 at eBay on Nov 9.
  • Checked at 4 stores.

Our take on the Mizudo 18kW 240V Electric Tankless Water Heater

The Mizudo 18kW is a whole-house electric tankless water heater rated for 2 to 3 points of use. It runs on 240V and draws up to 75A, so it needs two 40A breakers and two runs of 8 AWG wire. A digital display and touch panel set the temperature, and the slim 17 x 13 x 3.6 inch case mounts on a wall, in a garage or a basement. It competes with other 18kW electric tankless units on the same circuit demands; the real difference is installation cost and how much hot water your electrical panel can support.

Best forHomes with 2 to 3 hot-water pointsWarm-climate homes with no gas lineWall, garage or basement installs where floor space is tightReplacing a tank heater where panel capacity allows
Pros
  • Instant hot water with no tank to refill
  • Slim 3.6-inch profile mounts on a wall
  • Digital display and touch controls for setting temperature
  • Up to 99% thermal efficiency, with no standing-tank heat loss
  • Overheat protection and leak detection built in
  • Separate water and electrical paths limit limescale and leak risk
Cons
  • Needs two 40A breakers and two 8 AWG runs, a costly install
  • 75A draw can strain older or small electrical panels
  • Output falls in cold climates: incoming water temperature limits flow
  • No gas option, so it suits all-electric homes only
  • Installation is not a DIY job for most owners

Mizudo 18kW 240V Electric Tankless Water Heater prices at every store

  • The Home DepotNew

    In stock

    $249.99Free shippingChecked Nov 9
    Visit The Home Depot
  • MizudoNew

    In stock

    $299.00Checked Nov 9
    Visit Mizudo
  • Tractor Supply CoNew

    In stock

    $299.99Free shippingChecked Nov 9
    Visit Tractor Supply Co
  • eBayNew

    Availability unknownSold by mechanic_2374 (99.4% positive, 11,900 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $99.99Free shippingChecked Nov 9
    Visit eBay
  • eBayRefurbished

    Availability unknownSold by fogatti_residential_water_heater (100% positive, 2,300 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $143.99Free shippingChecked Nov 9
    Visit eBay
  • eBayPre-owned

    Availability unknownSold by fogatti_official_us (99.7% positive, 1,500 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $185.49Free shippingChecked Nov 9
    Visit eBay

Store links may earn us a commission. Some prices via Klarna.

Mizudo 18kW 240V Electric Tankless Water Heater price history

Lowest price we've seen: $249.99 on Nov 9 at The Home Depot. Tracked across 3 stores since Nov 9.

From Mizudo

  • Instant hot water suitable for 2-3 points of use throughout the whole house
  • Digital display and touch control panel for adjustable temperature
  • Space-saving: 17 x 13 x 3.6 inches, fits walls, garages and basements
  • Up to 99% thermal efficiency, more energy-efficient than tank-based heaters
  • Safety protection including overheating protection and leak detection
  • Internal water and electrical circuits operate separately to avoid leaks and limescale buildup
In the box
Detailed instruction manual for easy installation

About the Mizudo 18kW 240V Electric Tankless Water Heater

The Mizudo 18kW tankless water heater is an electric unit that heats water on demand and is suited to 2 to 3 points of use in a home. It has a digital display and a touch control panel for setting the hot water temperature.

The unit measures 17 x 13 x 3.6 inches and can be installed in tight spaces such as walls, garages and basements. It is rated at up to 99% thermal efficiency. Safety features include overheating protection and leak detection, and the internal water and electrical circuits operate separately.

It runs on 240V and draws a maximum of 75A. An instruction manual is included for installation.

Power source
Electric
Power
18kW at 240V
Max current
75A
Breaker
2 x 40 amp
Wire gauge
2 x 8 AWG/2
Water connection
3/4" NPT
Dimensions
17 x 13 x 3.6 inches (L x W x H)
Controls
Digital display with touch panel
Capacity
2 to 3 points of use
In the box
Instruction manual

Specifications

Power Source
Electric

Questions and answers

How much power does the Mizudo 18kW need?
It runs on 240V and draws up to 75A. Plan on two 40A breakers and two runs of 8 AWG/2 wire, plus a 3/4-inch NPT water connection.
How many fixtures can it run at once?
Mizudo rates it for 2 to 3 points of use. Running a shower and a sink together is realistic; three hot draws at once will split the output.
Will it work in a cold climate?
Tankless electric heaters raise water temperature by a fixed amount, so cold incoming water means lower flow at a given temperature. In freezing regions, expect to run fewer fixtures at once.
Is it hard to install?
The wiring and breaker work are the hard part and usually need a licensed electrician. The unit itself mounts on a wall and connects to standard 3/4-inch NPT plumbing.
Does it save energy over a tank heater?
It avoids the standby heat loss of a storage tank and is rated up to 99% thermally efficient. Savings depend on how much hot water you use and how much the old tank lost.
What comes in the box?
The heater and a detailed instruction manual. Breakers, wire and plumbing fittings are not included.
Where is the Mizudo 18kW 240V Electric Tankless Water Heater cheapest?
At eBay, for $99.99, 67% under what the other stores charge, as of our latest check.
Where can I buy the Mizudo 18kW 240V Electric Tankless Water Heater?
4 stores we checked sell it, including The Home Depot, Tractor Supply Co, eBay, Mizudo.

Stores we've priced the Mizudo 18kW 240V Electric Tankless Water Heater at

  • Home Depot deals and prices

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