Best Rheem Outdoor Heaters In September 2026

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Looking for the Best Rheem Outdoor Heaters that can last long and perform well? Read our review and buying guide on Best Rheem Outdoor Heaters below.

To help you in your search, we have completed this list of the Best Rheem Outdoor Heaters.

Top Rated Best Rheem Outdoor Heaters Of 2026

Rank	Product Name	Score
1	Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY Buy Now	9.7 Buy Now
2	Rheem 240V 3 Heating Chambers RTEX-24 Residential Tankless Water Heater, GRAY Buy Now	9.5 Buy Now
3	Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater Buy Now	9.1 Buy Now
4	Rheem RTG-84XLP-1 Tankless Water Heater, Grey Buy Now	8.8 Buy Now
5	Rinnai V Series HE Tankless Hot Water Heater: Outdoor Installation Buy Now	8.6 Buy Now
6	Rheem RTG-84DVLN 8.4 GPM Low NOx Direct Vent Tankless Natural Gas Water Heater Buy Now	8.3 Buy Now
7	Rheem RTG-95XLN-1 9.5 GPM Outdoor Tankless Low Nox Water Heater (NG) Buy Now	8.1 Buy Now
8	Rheem RTGH-95XLN Prestige Natural Gas Outdoor Whole House Low NOx Condensing Tankless 9.5 Buy Now	7.8 Buy Now
9	Rheem RTG-95XLN 9.5 GPM Low NOx Outdoor Tankless Natural Gas Water Heater Buy Now	7.5 Buy Now
10	Rheem 240V 3 Heating Chambers RTEX-27 Residential Tankless Water Heater Buy Now	7.2 Buy Now

1. Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY

• Durable copper immersion two heating elements, field serviceable. flow rate- up to 4.4 gpm
• External digital thermostatic control with led display (+/1 degree accuracy)
• Threaded for easy replacement, simple installation, digital temperature display
• Simple installation bottom 3/4 inch npt water connections
• Most advanced self-modulation, adjust power to meet hot water demand

2. Rheem 240V 3 Heating Chambers RTEX-24 Residential Tankless Water Heater, GRAY

• External digital thermostatic control with led display (+/1 degree accuracy)
• Simple installation bottom 3/4 inch npt water connections.threaded for easy replacement, simple installation, digital temperature display
• Flow rate: up to 5.9 gpm
• Durable copper immersion three heating elements, field serviceable
• Most advanced self-modulation, adjust power to meet hot water demand

3. Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater

• Intelligent electronic controls designed to increase energy efficiency and safety
• Third party efficiency listed by ahri
• Low nox version
• 94-percent energy efficient with stainless-steel condensing heat exchanger
• Up to 38-feet of 3-inch pvc pipe or 5-feet of 2-inch pvc pipe

4. Rheem RTG-84XLP-1 Tankless Water Heater, Grey

• Exclusive hot start programming minimizes cold water burst by staying in ready-fire state
• Exclusive water savings technology conserving up to 1, 100 gallons per year
• Recirculation pump ready kit ready.8.4 gal./min. at 35 f rise max
• 157, 000 btu (gas consumed per hour)
• For use outdoors with freeze protection up to -30 degrees

5. Rinnai V Series HE Tankless Hot Water Heater: Outdoor Installation

• Up to 6.5 gpm hot water flow rate (varies by groundwater temp)
• Control-r 2.0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode.
• V65ep he high efficiency tankless hot water heater - propane: outdoor installation only
• Endless hot water for your entire home
• Residential factory warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

6. Rheem RTG-84DVLN 8.4 GPM Low NOx Direct Vent Tankless Natural Gas Water Heater

• Umc-117 remote control and 10-feet of thermostat wire is included
• Natural gas tankless water heater
• Direct vent indoor
• Low nox version
• 8.4 gal/min. at 35-degree rise

7. Rheem RTG-95XLN-1 9.5 GPM Outdoor Tankless Low Nox Water Heater (NG)

• Includes full manufacturer warranty

8. Rheem RTGH-95XLN Prestige Natural Gas Outdoor Whole House Low NOx Condensing Tankless 9.5

• .94 energy factor (ef) with efficient stainless steel condensing heat exchanger
• Didgital (umc-117) remote control and 10-feet of thermostat wire included
• Up to 35-feet. of 3-feet pvc pipe or 5-feet of 2-feet pvc pipe
• 2-pipe direct vent system designed for pvc pipe
• Industry best .26 gpm minimum flow rate, .40 gpm minimum activation flow rate

9. Rheem RTG-95XLN 9.5 GPM Low NOx Outdoor Tankless Natural Gas Water Heater

• 9.5 gal/min. at 35-degree rise
• Natural gas tankless water heater
• Low nox version
• Umc-117 remote control and 10-feet of thermostat wire is included
• Outdoor

10. Rheem 240V 3 Heating Chambers RTEX-27 Residential Tankless Water Heater

• Most advanced self-modulation, adjust power to meet hot water demand
• Durable copper immersion three heating elements, field serviceable
• Simple installation bottom 3/4 inch npt water connections
• Threaded for easy replacement, simple installation, digital temperature display
• External digital thermostatic control with led display (+/1 degree accuracy)