Rheem RTEX-27 240-Volt 3-Chamber 27kW Electric Tankless Water Heater
Rheem

Rheem RTEX-27 240-Volt 3-Chamber 27kW Electric Tankless Water Heater

|4 ratings

Key item features

Endless Hot Water, Replaceable Heating Element, Adjustable Digital Temperature Display

Specs

Water heater type, Tankless Water HeatersFuel type, ElectricBrand, RheemVolume capacity, 27 Gal.</li><li>Temp.Features, AdjustableHeight, 19.75 in

About this item

Product details

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Electric Tankless Water Heater, Whole House, Water Heater Application General Purpose, Commercial/Residential, Watts - Water Heaters 27,000 W, Amps - Water Heaters 112 A, Voltage - Water Heaters 208/240, Min. Flow Activation 0.3 gpm, Phase - Water Heaters 1, Temp. Range - Water Heaters 59 Degrees to 140 Degrees F, Water Connection 3/4 in NPT, Temp. Rise @ 6.0 GPM 33 Degrees F, Temp. Rise @ 2.5 GPM - Water Heaters 74 Degrees F, Temp. Rise @ 4.0 GPM 46 Degrees F


Features

  • Item - Water Heaters: Electric Tankless Water Heater
  • Item: Electric Tankless Water Heater
  • Water Heater Design: Whole House
  • Water Heater Application: General Purpose
  • Commercial / Residential: Both
  • Watts - Water Heaters: 27,000
  • Amps - Water Heaters: 112
  • Voltage - Water Heaters: 208/240
  • Min. Flow Activation: 0.30 gpm
  • Phase - Water Heaters: 1
  • Temp. Range - Water Heaters: 59 Degrees to 140 Degrees F
  • Depth: 3-1/2"
  • Residential / Commercial: Both
  • Height to Top of Heater: 18.25"
  • Height: 18-1/4"
  • Fuel Type: Electric
  • Default Temperature: 120 Degrees F
  • Amps AC: 112
  • Pressure Range: 25 to 150 psi
  • Temp. Rise @ 2.5 GPM: 74 Degrees F
  • Vent Type: Tankless Electric
  • Phase: single
  • Standards: UL 499, CSA
  • Temp. Rise @ 2.5 GPM - Water Heaters: 74 Degrees F
  • Elements: Lead-Free Replaceable Cartridge Insert
  • Tank Capacity: 27 gal.
  • Temp. Rise @ 4.0 GPM: 46 Degrees F
  • Height to Top of Vent Connection: 18.25"
  • Voltage: 208/240 VAC
  • Mounting: Wall
  • Width: 14-1/2"
  • Max. Flow Rate: 6 gpm
  • Watts: 27000
  • Water Connection: 3/4" NPT
  • Features: Endless Hot Water, Replaceable Heating Element, Adjustable Digital Temperature Display
  • Temp. Range: 59 Degrees to 140 Degrees F
  • Wire Size: 8 AWG
  • Temp. Rise @ 6.0 GPM: 33 Degrees F
  • Zoro Benefits: 7,000+ Brands. Free Shipping. Hassle Free Returns.

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Endless Hot Water, Replaceable Heating Element, Adjustable Digital Temperature Display
info:
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Specifications

Water heater type

Tankless Water Heaters

Fuel type

Electric

Brand

Rheem

Volume capacity

27 Gal.
  • Temp.

    • Warranty

    Warranty information

    FAO warrants purchases against manufacturing defect for 30 days from the date of purchase (see "Return Policy"). FAO makes no warranties, express or implied, beyond this period, unless otherwise specifically and expressly stated. Further warranty may be offered by the product manufacturer. This warranty does not apply to products which are used for purposes other than that which they were designed for or which have been altered in any way that is detrimental to the performance or life of the product. For warranty information on a particular item or to obtain warranty parts/service on an item (if applicable), please contact the item manufacturer.

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    Warnings

    Customer ratings & reviews

    3 out of 5 stars
    stars
    4 ratings4 reviews
    Includes global ratings and reviews
    How item rating is calculated
    1. 5 stars50% (2)
    2. 4 stars0% (0)
    3. 3 stars0% (0)
    4. 2 stars0% (0)
    5. 1 star50% (2)
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    Showing 1-3 of 4 reviews

    Nov 29, 2022
    Reviewer name: Dale1980
    5 out of 5 stars
    5 out of 5 stars review

    Unlimited hot water

    I have been using my Rheem 27kw now for 11 months and have zero complaints. Before we had it after 3 showers have been taken in the house the person having the 4th would have colder water for theirs and if it's winter time it would just become cold.

    Review from rheem.com
    Helpful?79FU9DKEN6AP181472345
    reply from Supplier Response

    Hi, Thank you for this 5-star review. We are glad to hear that your new water heater is working great for you. If you need assistance with your water heater, please call our Technical Support team at 800-432-8373 between the hours of 8 A.M. and 5 P.M. CST Monday through Friday.

    Nov 28, 2018
    Reviewer name: NickH
    5 out of 5 stars
    5 out of 5 stars review

    Great Water Heater!

    I bough this 24kw heater and not had a problem yet!, we take long showers at 105 to 110 F and had not had it cold one time, I would recommend this product, it's easy to install and comes with a great warranty!

    Review from rheem.com
    Helpful?79FU9DKEN6AP181472345
    Apr 2, 2025
    Reviewer name: Rachel
    Sold and shipped byDirect Supply Store
    1 out of 5 stars
    1 out of 5 stars review

    Verified Purchase

    Terrible service

    They sent the wrong product and did not respond to emails or answer the phone. I would not do business with them again

    Helpful?79FU9DKEN6AP181472345
    Current price is $702.64
    Price when purchased online
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    • Free Holiday returns until Jan 31
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    Sold and shipped by Direct Supply Store
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