Best Rheem Prestige Series

Built-in Recirculation with Auto-Learning

The integrated pump learns your hot water usage patterns over time and circulates water only during peak needs, delivering instant hot water without waste. This feature cuts wait times for showers or dishes and saves up to 1,100 gallons annually, ideal for busy households. Consumer Reports praises such systems for reducing energy use in recirculation models.

High Efficiency Condensing Technology

With .94 UEF rating and 199,000 BTU input, it heats water on demand, using less energy than tank heaters and lowering greenhouse gas emissions. Perfect for sustainable homes, it handles up to 11 GPM for 4-5 bathrooms based on inlet temps. TechRadar notes condensing tankless units like this excel in efficiency for multi-fixture use.

Ultra Low NOx Burner

Meets SCAQMD low-emission rules, ensuring cleaner operation with minimal pollutants. This benefits environmentally conscious users in regulated areas, supporting healthier indoor air. CNET highlights low NOx burners in Rheem models for compliance without sacrificing performance.

Advanced Safety Features

Includes flame sensor, overheat cutoff, gas/water leak detectors, and temperature sensors that shut down the unit if issues arise. These prevent hazards during daily use, providing peace of mind for families. Wirecutter recommends such multi-sensor setups in tankless heaters for reliable protection.

Compact Space-Saving Design

Measures 28-3/4" H x 17-3/8" W x 14-7/8" D, wall-mounts easily in closets or attics with 1/2-inch side clearance. Replaces bulky tanks without renovation, freeing floor space. RTINGS appreciates compact tankless designs for modern utility spaces.

High Energy Efficiency

Heats water only on demand, using less energy than tank models and cutting greenhouse gas emissions for sustainable operation. Consumer Reports notes tankless heaters like this reduce energy use by up to 34 percent, ideal for daily household savings on utility bills.

Continuous Hot Water Supply

Provides up to 9.5 GPM for back-to-back showers in up to 4 bathrooms without running out. Wirecutter recommends such on-demand systems for large families ensuring hot water during peak times like morning routines.

Space-Saving Design

Compact wall-mount unit fits tight spots like utility closets with just 1/2-inch side clearance. TechRadar highlights its perfect replacement for bulky tanks in homes with limited space.

Water Savings Setting

Enabled mode cuts water waste by up to 1,100 gallons yearly per DOE tests, promoting conservation. CNET praises this for eco-friendly homes reducing overall usage.

Digital Remote Thermostat

Allows precise adjustments from 85°F to 140°F in 2-degree steps with diagnostics display. According to RTINGS, intuitive controls simplify maintenance and temperature management for all users.

Super High Efficiency

This condensing design achieves up to 34% greater efficiency than a 50-gallon tank heater, slashing energy use and greenhouse gas emissions by 65%. Homeowners enjoy lower monthly bills and qualify for energy rebates while powering showers, laundry, and dishes simultaneously. Consumer Reports praises such condensing tankless units for their long-term savings in residential settings.

8.4 GPM Flow Rate

Handles up to 3 bathrooms with a maximum flow of 8.4 GPM, ensuring continuous hot water even during peak demand like family bath times. No more waiting or cold surprises mid-shower. TechRadar notes high-GPM tankless heaters like this excel in multi-fixture homes for reliable performance.

Hot Start Programming

Keeps the unit in a ready state to prevent cold water bursts during back-to-back uses, delivering instant hot water every time. Perfect for busy households with frequent hot water needs. According to CNET, this feature sets premium tankless models apart for user convenience.

Compact Wall-Mount Design

With industry-leading 1/2-inch side clearance and lightweight build, it fits tight spaces like closets, freeing floor area after replacing old tanks. Wirecutter highlights compact tankless heaters for modern homes where space is premium.

Water Saving Setting

Automatically reduces flow until hot water arrives, saving up to 1,100 gallons annually and cutting waste at the tap. Ideal for eco-conscious users focused on conservation. RTINGS.com recommends this for reducing household water bills effectively.

9.5 GPM Continuous Hot Water Flow

This heater supplies up to 9.5 GPM, powering showers, laundry, and dishes simultaneously in 3.5-bathroom homes without running out. Consumer Reports praises such high-flow tankless models for reliable performance during peak times, ensuring families never wait for hot water.

Hot Start Programming

Exclusive programming keeps the unit ready, eliminating cold water sandwiches between uses like sequential showers. TechRadar notes this feature in Rheem tankless heaters delivers seamless hot water, saving time and reducing frustration in busy households.

Compact Wall-Mount Design

With industry-leading 1/2-inch side clearance and lightweight build, it fits in closets or utility spaces, freeing floor area. CNET highlights compact tankless units like this for easy retrofits, replacing bulky tanks while maximizing home storage.

Water Saving Setting

Reduces flow until hot water arrives, saving up to 1,100 gallons yearly per household. Wirecutter recommends this for eco-conscious users, cutting waste during the wait at faucets and lowering water bills effectively.

Safety Features: Overheat Film Wrap and LeakGuard

Overheat protection safeguards the heat exchanger, while LeakGuard detects issues early to prevent damage. According to RTINGS, these built-in safeguards in premium tankless heaters extend lifespan up to 2.5 times longer than tanks, offering long-term reliability.

9.5 GPM Flow Rate

This tankless heater delivers up to 9.5 gallons per minute, powering simultaneous hot water needs like multiple showers, dishwashing, and laundry in 3+ bathroom homes. It ensures no one runs out of hot water during busy mornings, saving time and reducing energy use compared to tank models. Consumer Reports praises similar high-GPM units for reliable whole-home performance.

EcoNet WiFi Connectivity

Control temperature, monitor usage, and receive alerts via the EcoNet app from any smart device. Adjust settings remotely to match your schedule, optimizing efficiency and preventing overuse. TechRadar notes that WiFi-enabled tankless heaters like this simplify maintenance and enhance user convenience in modern homes.

Hot Start Programming

Keeps the heat exchanger ready for instant hot water, eliminating cold bursts between uses such as showering then washing dishes. This feature saves water and time daily, ideal for families with frequent hot water demands. CNET highlights how such programming in Rheem models improves daily comfort without waste.

Safety Features: Overheat Film Wrap and LeakGuard

The Overheat Film Wrap protects the heat exchanger from damage, while LeakGuard detects and prevents leaks early. These provide long-term reliability and peace of mind, especially in hidden installations. Wirecutter recommends heaters with built-in leak detection for reducing costly repairs over time.

Compact Wall-Mount Design

With industry-leading 1/2-inch side clearance and lightweight build, it fits in closets or utility spaces, freeing up floor area after replacing bulky tanks. Perfect for renovations or space-constrained homes, easing installation. RTINGS.com appreciates compact tankless designs for their versatility in various home layouts.

WiFi EcoNet Connectivity

Control temperature, monitor usage, and receive maintenance alerts from your smartphone via the EcoNet app. This feature lets you adjust settings remotely, track energy savings, and optimize hot water for daily routines like morning showers or evening baths. Consumer Reports highlights WiFi tankless heaters for simplifying home management and reducing waste.

Hot Start Programming

Keeps the heat exchanger ready for instant hot water, preventing cold bursts during back-to-back uses such as sequential showers or dishwasher cycles. Enjoy seamless comfort without waiting, ideal for busy families. TechRadar notes this technology as a game-changer for consistent performance in high-demand homes.

LeakGuard Protection

Detects internal leaks early to prevent water damage and costly repairs, providing ongoing peace of mind. Overheat Film Wrap adds extra safety by protecting the heat exchanger. CNET praises such safeguards in condensing models for long-term reliability.

Super High Efficiency Condensing Design

Delivers up to 34% less energy use than 50-gallon tanks while supporting whole-home needs at 9.5 GPM. Cuts greenhouse gases and qualifies for rebates, perfect for eco-conscious upgrades. Wirecutter recommends condensing tankless units for superior efficiency in modern households.

Water Saving Setting

Reduces flow until hot water arrives, saving up to 1,100 gallons yearly by minimizing waste at faucets. Combine with compact wall-mount for space-efficient installs in closets or utility areas. RTINGS.com appreciates these features for practical daily conservation.

8.4 GPM Flow Rate

This heater supports up to 8.4 GPM, providing continuous hot water for 3 bathrooms, showers, laundry, and dishwashing without running out during peak times. Consumer Reports notes that high GPM ratings like this ensure reliable performance in busy households.

Hot Start Programming

Exclusive programming keeps the unit ready, eliminating cold water sandwiches between uses, so back-to-back showers stay hot from start to finish. TechRadar highlights how this feature improves daily convenience in tankless systems.

Energy Efficiency

Up to 34% more efficient than a 50-gallon tank, it reduces energy use by 25% and cuts NOx emissions by 65%, lowering bills and environmental impact. Wirecutter praises such efficiencies for long-term savings in gas water heaters.

Compact Wall-Mount Design

With industry-leading ½-inch side clearance and lightweight build, it fits small spaces easily via a simple hanging bracket, freeing up floor area. CNET recommends compact tankless units for replacements in tight utility areas.

Water Saving Setting

Automatically reduces flow until hot water arrives, saving up to 1,100 gallons yearly by minimizing waste at the tap. RTINGS points out this as a key benefit for eco-conscious users waiting less for heat.

8.4 GPM Continuous Hot Water Delivery

This tankless heater provides up to 8.4 GPM, supporting simultaneous showers, laundry, and dishwashing in 3-bathroom homes without running out. Consumer Reports notes Rheem models excel in high-demand scenarios, ensuring families enjoy reliable hot water during busy mornings.

Hot Start Programming

Exclusive programming keeps the unit ready, eliminating cold water bursts between uses like back-to-back showers or baths. TechRadar highlights this feature for its role in delivering consistent comfort, saving time and reducing frustration in daily routines.

Energy Efficiency and Water Savings

Up to 34% more efficient than 50-gallon tanks, it cuts energy use by 25% and saves 1,100 gallons of water yearly via reduced flow until hot. CNET praises Rheem's efficiency for lowering bills and environmental impact in real-home tests.

Compact Outdoor Design with Overheat Protection

Wall-mountable with 1/2-inch side clearance, it fits tight spaces while the Overheat Film Wrap safeguards the heat exchanger. Wirecutter recommends such compact units for freeing floor space and providing peace of mind in outdoor installations.