StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › Rheem
Rheem
RHEEM RTEX-11 11kw 240v Tankless, Instant Electric Water Heater

RHEEM RTEX-11 11kw 240v Tankless, Instant Electric Water Heater

5(1 rating)

Best price now

$255.00at PartsToday.comChecked 58 min ago

18% under what the other stores charge

Compared across 17 stores. Prices are checked against each store and labelled with when.

Visit PartsToday.com

Ask our agent about this product

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

Enter to send, Shift+Enter for a new line

Price facts

  • Lowest price today: $255.00 at PartsToday.com (checked Nov 12, 2026).
  • Checked at 17 stores.

Our take on the RHEEM RTEX-11 11kw 240v Tankless, Instant Electric Water Heater

The Rheem RTEX-11 is an 11 kW, 240 V tankless electric water heater built for point-of-use duty: a single sink, a small bathroom, or a workshop. It heats water only while a tap is running, needs no venting, and its compact body takes a fraction of the space of a tank. That makes it a fit for adding hot water where a tank won't go, but 11 kW is modest output: at cold inlet temperatures it serves one fixture at a time, not a whole house. Compared with larger 18–27 kW Rheem units, it trades flow capacity for a smaller electrical circuit, and owners of point-of-use installs generally find it does the job when sized honestly.

Best forA single sink, bathroom or workshopAdding hot water where a tank won't fitCabinet or under-sink installsLow-demand point-of-use setups
Pros
  • Heats only when water flows, no standby tank losses
  • No venting needed; compact enough for tight spaces
  • Endless hot water at low flow, no tank to run cold
  • 240 V, 11 kW load fits a smaller circuit than whole-house units
Cons
  • 11 kW limits output to one fixture at a time in cold climates
  • Electric tankless draws high current; needs a dedicated circuit
  • Flow and temperature depend on incoming water temperature
  • Hard water can scale the element over time

RHEEM RTEX-11 11kw 240v Tankless, Instant Electric Water Heater prices at every store

  • PartsToday.comNew

    In stock

    $255.00Checked 58 min ago
    Visit PartsToday.com
  • The Home DepotNew

    In stock

    $258.32Free shippingChecked 59 min ago
    Visit The Home Depot
  • Wholesale Water HeatersNew

    In stock

    $260.00Free shippingChecked 59 min ago
    Visit Wholesale Water Heaters
  • PlumbersCrib.comNew

    In stock

    $271.99Free shippingChecked 59 min ago
    Visit PlumbersCrib.com
  • Ferguson HomeNew

    In stock

    $310.74Free shippingChecked 59 min ago
    Visit Ferguson Home
  • WayfairNew

    In stock

    $311.99Free shippingChecked 59 min ago
    Visit Wayfair
  • Grainger Industrial SupplyNew

    In stock

    $359.66+ $15.69 shippingChecked 59 min ago
    Visit Grainger Industrial Supply
  • acunitsforlessNew

    Availability unknown

    $257.00Checked 59 min ago
    Visit acunitsforless
  • eBayNew

    Availability unknownSold by directsupplystore

    $259.75Checked 59 min ago
    Visit eBay
  • Big Frog SupplyNew

    Availability unknown

    $269.00Checked 59 min ago
    Visit Big Frog Supply
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $281.18Free shippingChecked 59 min ago
    Visit Amazon
  • Rheem Tankless HeatersNew

    Availability unknown

    $309.95Checked 59 min ago
    Visit Rheem Tankless Heaters
  • Radwell.comNew

    Availability unknown

    $321.00Checked 59 min ago
    Visit Radwell.com
  • WalmartNew

    Availability unknownSold by Buildcom

    $331.29Checked 59 min ago
    Visit Walmart
  • ZoroNew

    Availability unknown

    $339.99Checked 59 min ago
    Visit Zoro
  • Voomi SupplyNew

    Availability unknown

    $344.77Checked 59 min ago
    Visit Voomi Supply
  • AF SupplyNew

    Availability unknown

    $388.65Checked 59 min ago
    Visit AF Supply

Also available at

  • Wholesale Water HeaterCheck price at Wholesale Water Heater

Store links may earn us a commission.

RHEEM RTEX-11 11kw 240v Tankless, Instant Electric Water Heater price history

Lowest price we've seen: $255.00 on Nov 12 at PartsToday.com. Tracked across 17 stores since Nov 12.

About the RHEEM RTEX-11 11kw 240v Tankless, Instant Electric Water Heater

The Rheem Performance RTEX-11 is an 11 kW tankless electric water heater for point-of-use applications. It supplies a continuous flow of hot water on demand and requires no venting.

The unit is compact, about 90 percent smaller than a tank, so it can be installed in tight spaces, including under a sink. It draws energy only while hot water is flowing, unlike a traditional tank that uses energy to keep stored water hot.

A lower-kilowatt unit can serve one or several point-of-use locations. Higher-kilowatt units can supply a whole house, depending on the inlet ground water temperature.

Brand
Rheem
Model
RTEX-11
Type
Tankless electric water heater
Power
11 kW
Voltage
240 V
Application
Point-of-use
Venting
None required
Size
About 90 percent smaller than a tank

Questions and answers

Will the RTEX-11 run a whole house?
No. At 11 kW it is a point-of-use unit. It handles one fixture or a small group at low flow; whole-house use needs a higher-kilowatt model.
What electrical setup does it need?
It runs on 240 V and draws roughly 46 A at full power, so it needs a dedicated circuit sized for that load, installed by a licensed electrician.
Does it need venting?
No. Electric tankless heaters produce no combustion gases, so there is no flue or venting.
How much hot water can it deliver?
Output depends on inlet temperature. In warmer groundwater it supports a shower or sink; in cold incoming water, expect lower flow at a usable temperature.
Is it better than a small tank heater?
It saves space and avoids standby losses, but a small tank can supply more than one tap at once. Choose based on how many fixtures run together.
Where is the RHEEM RTEX-11 11kw 240v Tankless, Instant Electric Water Heater cheapest?
At PartsToday.com, for $255.00, 18% under what the other stores charge, as of our latest check.
What do buyers say about the RHEEM RTEX-11 11kw 240v Tankless, Instant Electric Water Heater?
Rated 5 out of 5 from 1 ratings.
Where can I buy the RHEEM RTEX-11 11kw 240v Tankless, Instant Electric Water Heater?
17 stores we checked sell it, including PartsToday.com, The Home Depot, Amazon, acunitsforless, eBay.

Stores we've priced the RHEEM RTEX-11 11kw 240v Tankless, Instant Electric Water Heater at

  • AF Supply deals and prices
  • Ferguson Home deals and prices
  • Grainger Industrial Supply deals and prices
  • Home Depot deals and prices
  • Walmart deals and prices
  • Wayfair deals and prices
  • Zoro deals and prices
  • More from Rheem

    • R
      Rheem RTEX-24 Professional Classic Electric Tankless Water Heater
      Rheem RTEX-24 Professional Classic Electric Tankless Water Heater
    • R
      Rheem RTEX-13 Professional Classic Series
      Rheem RTEX-13 Professional Classic Series
    • R
      Rheem RTEX-18 Professional Classic Series
      Rheem RTEX-18 Professional Classic Series
    • R
      Rheem RTGH-95DVLN-3 Super High-Efficiency Condensing Indoor Natural Gas Tankless Water Heater
      Rheem RTGH-95DVLN-3 Super High-Efficiency Condensing Indoor Natural Gas Tankless Water Heater
    • R
      Rheem RTEX-18 Tankless Instant Electric Water Heater
      Rheem RTEX-18 Tankless Instant Electric Water Heater
    • R
      Rheem Super High Efficiency IKONIC RTGH-S11i Tankless Water Heater
      Rheem Super High Efficiency IKONIC RTGH-S11i Tankless Water Heater
    • R
      Rheem RTEX-13 240-Volt 1-Chamber 13kW Electric Tankless Water Heater
      Rheem RTEX-13 240-Volt 1-Chamber 13kW Electric Tankless Water Heater
    • R
      Rheem RTG Series 7.0 GPM Liquid Propane Tankless Water Heater Indoor
      Rheem RTG Series 7.0 GPM Liquid Propane Tankless Water Heater Indoor
    All Rheem deals and products →

    More electric tankless water heaters

    • R
      Rheem Performance Platinum Electric Tankless Water Heater
      Rheem Performance Platinum Electric Tankless Water Heater
    • E
      EcoSmart ECO 27 Electric Tankless Water Heater
      EcoSmart ECO 27 Electric Tankless Water Heater
    • O
      Opti 27 Electric Tankless Water Heater
      Opti 27 Electric Tankless Water Heater
    • T
      Tankless Electric Water Heater, 27kW, Digital Touch Screen, 240V, Diamond Gray
      Tankless Electric Water Heater, 27kW, Digital Touch Screen, 240V, Diamond Gray
    • R
      Rheem RTEX-27 Electric Tankless Water Heater
      Rheem RTEX-27 Electric Tankless Water Heater
    • E
      Electric Tankless Water Heater 27kW 240V
      Electric Tankless Water Heater 27kW 240V
    • C
      Casa Home Living 14kW Tankless Electric Water Heater
      Casa Home Living 14kW Tankless Electric Water Heater
    • C
      Casa Home Living 18kW Tankless Electric Water Heater
      Casa Home Living 18kW Tankless Electric Water Heater