Outdoor Split System Heat Pump Water Heater
The most adaptable residential heat pump solution for energy savings, installation flexibility, and smart performance.
Outdoor Split System Heat Pump Water Heater By Reliance®
Introducing Reliance’s® Outdoor Split System Heat Pump Water Heater. An advanced, space-saving heat pump water heater designed for maximum efficiency and installation flexibility.
Developed with Panasonic, this high-efficiency split system pairs a quiet outdoor heat pump with an indoor storage tank, making it ideal for homes with limited space or ventilation.
ENERGY STAR® certified and powered by low-GWP CO₂ refrigerant, the outdoor split system heat pump delivers outstanding performance with up to a 95-gallon first-hour rating and a standard 4.5 kW output—without backup elements.
Its flexible design offers multiple tank sizes, long pipe runs, and versatile installation options, including ground, wall, or rooftop mounting, with no indoor ventilation required.
Built for all climates, it operates efficiently from –25°F to 109°F, maintaining performance even in freezing conditions. Smart controls via the iCOMM™ app provide remote monitoring, leak detection, demand-response readiness, and more.
Outdoor Split System Heat Pump Water Heater Components
Outdoor Heat Pump Unit
- ENERGY STAR® certified—Up to 3.80 Uniform Energy Factor (UEF)
- Up to 95-gallon first hour rating
- Backed by a 10-year warranty
Pick Your Indoor Tank Size
- ENERGY STAR® certified—3.52 Uniform Energy Factor (UEF)
- 70-gallon first hour rating
- Backed by a 10-year warranty
- ENERGY STAR® certified—3.52 Uniform Energy Factor (UEF)
- 67-gallon first hour rating
- Backed by a 10-year warranty
- ENERGY STAR® certified—3.80 Uniform Energy Factor (UEF)
- 95-gallon first hour rating
- Backed by a 10-year warranty
- ENERGY STAR® certified—3.70 Uniform Energy Factor (UEF)
- 82-gallon first hour rating
- Backed by a 10-year warranty
- ENERGY STAR® certified—3.55 Uniform Energy Factor (UEF)
- 72-gallon first hour rating
- Backed by a 10-year warranty
Outdoor Split System Heat Pump Water Heater Features & Benefits
Flexible Installation
Save space and energy with this quiet hybrid heat pump water heater, offering flexible outdoor installation (on the ground, on a wall, or on a roof) and an indoor storage tank that plugs into a standard outlet, providing a reliable, easily programmable hot water solution for your home.
Superior Cold Climate Performance
Designed to work in extreme weather, this heat pump water heater runs efficiently in temperatures from -25°F to 109°F, delivering energy-saving performance even in harsh cold where standard heat pumps struggle.
Advanced Energy Savings
With up to 3.8 UEF, it can save homeowners an average of up to $600 per year in energy costs.*
*Comparing an 80-gallon heat pump against a pre-2015 similarly sized standard electric using DOE EF to UEF conversion rates. Savings may vary.
Environmentally Friendly
Features CO₂ refrigerant with a GWP of 1 (lowest environmental impact), along with an A1 safety rating for non-toxic, non-flammable performance.
Smart Features & Protection
Stay in control with smart features powered by the iCOMM™ mobile app, including guest mode, leak alerts, and demand-response/time-of-use energy savings, plus options for automatic water shutoff for extra peace of mind.
How the Outdoor Split System Heat Pump Water Heater Works
Step 1
Cold water enters the tank through a dip tube, which forces it to the bottom of the tank while pushing hot water out through the top connection.
Step 2
The hot water leaving the tank is tempered to 120 degrees—or to the user’s preference—using a mixing valve.
Step 3
The outdoor unit begins pumping cold water from the bottom of the tank, starting the heating cycle.
Step 4
A fan pulls air across an evaporator coil, transferring heat from the air into the refrigerant inside the coil.
Step 5
The compressor starts and compresses the CO₂ refrigerant, raising its pressure and temperature as it is pumped through the inner tube of a concentric heat exchanger.
Step 6
Water flows through the outer tube of the heat exchanger, absorbing heat from the refrigerant.
Step 7
Hot water is pumped back into the top of the tank.
Step 8
This process continues until the temperature at the bottom of the tank reaches 120 degrees.
Frequently Asked Questions
Reliance's Outdoor Split System Heat Pump Water Heater is a split-system heat pump water heater with an outdoor unit and indoor storage tank, offering high efficiency, smart features, and flexible installation. Unlike integrated heat pump water heaters, it doesn’t require large indoor air volumes, making it ideal for homes with limited space.
This heat pump delivers up to 95% first-hour rating and advanced UEF performance, helping homeowners save, on average, up to $600 on annual utility bills compared to standard electric water heaters. It operates efficiently in temperatures as low as –25°F, providing reliable hot water even in cold climates.
The system connects to the iCOMM™ app for remote monitoring and control. It includes guest mode, leak detection alerts, optional automatic water shutoff, demand-response capability, and an anti-freeze valve kit to prevent freeze damage during power loss.
Yes, it uses CO₂ refrigerant with a Global Warming Potential (GWP) of 1—the lowest available—reducing environmental impact compared to standard refrigerants. The system is A1 rated, meaning it’s non-toxic and non-flammable, offering safe, sustainable performance.
Find Your Neighborhood Retail Store Location
For more than 40 years, Reliance Water Heaters has been committed to delivering dependable water heaters. Order from a trusted retailer near you.