---
product_id: 173230773
title: "Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 9.0 GPM - RTGH-90XLN-2"
brand: "rheem"
price: "$4068.89"
currency: USD
in_stock: true
reviews_count: 1
url: https://www.desertcart.us/products/173230773-rheem-prestige-condensing-tankless-outdoor-natural-gas-water-heater-9
store_origin: US
region: United States of America
---

# 0.26 GPM ultra low flow activation 180,000 BTU high-efficiency power Freeze protection down to -30°C Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 9.0 GPM - RTGH-90XLN-2

**Brand:** rheem
**Price:** $4068.89
**Availability:** ✅ In Stock

## Summary

> 🔥 Elevate your home’s hot water game—never wait, never waste!

## Quick Answers

- **What is this?** Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 9.0 GPM - RTGH-90XLN-2 by rheem
- **How much does it cost?** $4068.89 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/173230773-rheem-prestige-condensing-tankless-outdoor-natural-gas-water-heater-9)

## Best For

- rheem enthusiasts

## Why This Product

- Trusted rheem brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Powerhouse:** Space-saving design fits perfectly as a tank replacement without compromising performance or style.
- • **Eco-Smart Efficiency:** Save on energy bills with a 0.93 UEF rating and advanced water-saving settings designed for the eco-conscious professional.
- • **Safety First, Always:** Built-in water & gas leak detection plus Guardian Overheat Film Wrap ensure your home stays protected 24/7.
- • **Instant Hot Water, Zero Wait:** Experience continuous hot water on demand with industry-leading low flow activation at just 0.26 GPM.
- • **Smart Control at Your Fingertips:** Connect via EcoNet app for real-time diagnostics and maintenance alerts—because your time is valuable.

## Overview

The Rheem Prestige RTGH-90XLN-2 is a high-efficiency, outdoor natural gas tankless water heater delivering continuous hot water with ultra-low flow activation. Featuring a powerful 180,000 BTU burner, freeze protection to -30°C, and smart leak detection, it combines safety, energy savings, and compact design. Ideal for up to 5 bathrooms, it includes digital remote control and EcoNet app compatibility for seamless management.

## Description

Rheem Prestige® RTGH-90XLN-2 is a high efficiency condensing outdoor natural gas tankless water heater designed for continuous hot water. Industry leading low flow activation with a minimum flow rate of .26GPM and minimum activation flow rate of .40GPM ensures hot water is received even in low demand situations. Ultra Low NOx burner meets SCAQMD rule requirements of safety with low emissions. While our exclusive Guardian Overheat Film Wrap prevents our units from reaching the dangerous temperatures others can. Add in our maintenance notification settings, self-diagnostic system and EcoNet enabled mobile app feature (additional kit available), buying the Rheem Prestige tankless water heater makes perfect sense. Included are also a built-in condensate neutralizer, digital remote control and 10ft. of thermostat wire. As this unit is meant for use outdoors, venting is not required. Can be used with up to 5 bathrooms depending on inlet temperature; .93UEF (.96EF Canada), 180,000BTU efficiency. Professional installation is required otherwise warranty void. Warranty: 12yr heat exchanger, 5 yr parts and 1 yr labor.

Review: Very disappointed - Item was previously used and damaged in shipping.

## Features

- Hot water without the wait - or the waste
- Low operating cost - High energy efficiency and water savings setting
- Space Savings - Compact, space-saving design. Perfect for a tank replacement.
- Water & Gas Leak Detection will shut down unit and provide an error code
- For use outdoors with freeze protection up to -30 degrees

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Rheem |
| Capacity | 9 Gallons |
| Color | Gray |
| Power Source | ac_dc |
| Special Feature | Detection |
| Voltage | 120 Volts |

## Product Details

- **Brand:** Rheem
- **Special Feature:** Detection
- **Color:** Gray
- **Voltage:** 120 Volts
- **Style:** Industry,Outdoor

## Images

![Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 9.0 GPM - RTGH-90XLN-2 - Image 1](https://m.media-amazon.com/images/I/613GfxYq5xL.jpg)

## Customer Reviews

### ⭐ Very disappointed
*by S***T on July 19, 2021*

Item was previously used and damaged in shipping.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-14*