
Rheem RTEX-18 Professional Classic Series
Best price now
46% under what the other stores charge
Compared across 7 stores. Prices are checked against each store and labelled with when.
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Price facts
- Lowest price today: $224.21 at PrairieGrit (checked Nov 12, 2026).
- Checked at 7 stores.
Rheem RTEX-18 Professional Classic Series prices at every store
- eBayNew
In stock
$325.00+ $35.00 shippingChecked 1 h ago - MIAMI WATER HEATERSNew
In stockReturn policy
$410.00Checked 1 h ago - Home DepotNew
In stock
$449.00Free shippingChecked 1 h ago - Core RangerNew
In stock
$449.00Checked 1 h ago - PrairieGritNew
Availability unknown
$224.21Checked 1 h ago - WalmartOpen box
Availability unknownSold by VIPUSA
$417.00Checked 1 h ago - AmazonNew
Availability unknown
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$418.00Free shippingChecked 1 h ago
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Rheem RTEX-18 Professional Classic Series price history
Lowest price we've seen: $224.21 on Nov 12 at PrairieGrit. Tracked across 5 stores since Nov 12.
About the Rheem RTEX-18 Professional Classic Series
ON SALE UNTIL JULY 31st!
Professional Classic® tankless electric water heaters offer continuous hot water quick and on demand for single point of use or multiple applications.
This is a brand new unit and has a full manufacturer's warranty.
Performance Features
• On demand, continuous hot water
• Compact and stylish with digital temperature control in increments of 1°F ranging from 80°F to 140°F
• 99.8% Energy efficient • Robust copper immersion heating elements with brass top increases durability and are threaded for easy replacement
• Simple Installation
• Digital temperature display
Applications
• Standard Hand Sink – 0.5 GPM
• Washing Machine – 1 to 1.5 GPM
• Kitchen Sink – 1 to 2 GPM
• Dishwasher – 1 to 2 GPM
• Water-Saver Shower Head – 1.5 GPM
• Standard Shower Head – 2.0 GPM
• Bath Tub – = 4 GPM
• Whole-Home – up to 6 GPM
Average Gallons Per Minute (GPM) based on 2010 Plumbing Standards
Unique Features
• External Digital Thermostatic Control with LED display (+/- 1 degree accuracy)
• Most advanced self-modulation, adjust power to meet hot water demand
• Durable Copper Immersion three heating elements, field serviceable
• Simple Installation – Bottom 3/4"NPT water connections
Questions and answers
- Where is the Rheem RTEX-18 Professional Classic Series cheapest?
- At PrairieGrit, for $224.21, 46% under what the other stores charge, as of our latest check.
- Where can I buy the Rheem RTEX-18 Professional Classic Series?
- 7 stores we checked sell it, including MIAMI WATER HEATERS, Amazon, PrairieGrit, eBay, Walmart.








