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Rheem 'RTE 18' 5 GPM Electric Tankless Water Heater

Included Warranty: 10 year Limited Manufacturer
Today: $509.99
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ITEM# 15580087
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    ITEM#: 15580087

    This electric tankless water heater from Rheem is just right for bathroom renovations or additions. Its compact design fits almost anywhere and provides continuous hot water on demand.

    Click here to view additional information about this item

    • Type: Electric, tankless
    • Brand: Rheem
    • Model: RTE 18
    • Volts: 240 volts - 18KW
    • UL listed: Yes
    • Materials: Metal, plastic
    • Standard 0.5-inch water connection
    • Rugged brass/copper heat exchange
    • Industry leading low-flow activation
    • Modulating power
    • Maximum flow rate: 5.0 GPM
    • Dimensions: 10.5 inches long x 11.25 inches wide x 7 inches high
    • Energy saver: Yes
    • No assembly required
    • Display: LEDs indicate active element and standby mode
    • Settings: External on-unit temperature control


    Material Metal, Plastic
    Fuel Type Electric
    Product Features Energy Star Compliant, UL Listed, Variable Temperature Control
    Wattage 7000 Watts or More
    Dimensions See Details
    Warranty 10 year Limited Manufacturer
    Model Number RTE 18
    Country of Origin United States

    Product Reviews

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    • Most Recent

    • What a piece of junk.

      Comes with NO attachments, poor directions, spent a fortune on complex fittings, does not work as it is suppose to, will now cost more to return it than it is worth, what a piece of junk, going with a small tank water heater and this is going to scrap heap.

      Read More

    Questions & Answers

    • must I use copper tubing in/out of water heater

      • Thank you for contacting us 1kaz. You can use either copper or PVC, unless the temperatures you are reaching are above 180 degrees. In that case you would want to use the copper supplies. Please let us know if you have any further questions.

    • What size unit should I use for a 1 bathroom Studio apt with a maximum of 2 people.

    • does this item come with all the necessary attachments? How do I know what size to get for my square footage? I have 1800 sq. foot.

      • Hi, coolsesh1234. This water heater does come with a mounting kit. The right size for you would depend on the amount of water you use in your home rather than the square footage of your home. This product has a maximum flow rate of 5 GPM. Please let us know if you have any further questions. Thank you for your interest.

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    Shipping & Returns


    Usually leaves our warehouse in 1-2 business days. *

    Standard Return Policy:

    Items must be returned in new or unused condition and contain all original materials included with the shipment. More Details

    FINAL SALE EXCLUSION: Items marked as FINAL SALE are not returnable unless the problem you experience is the result of our error.

    Shipping Information:

    Our standard shipping method is ground shipping. We also offer expedited shipping for most items. Your final shipping cost and estimated delivery timeframe will be available at checkout.
    Standard shipping details
    Expedited shipping details

    For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.

    ** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.