Radiant, Hot Water & Hydronic Geothermal Heat Pump 5 Series® 504W11
The WaterFurnace 5 Series® 504W11 is a hydronic geothermal heat pump featuring advanced OptiHeat® technology for higher water temperatures—ideal for radiant heating, baseboards, and spa/pool applications. With up to 145°F output, ENERGY STAR® certification, and quiet, efficient operation, it's a perfect replacement for boilers and traditional systems. Available in 4 and 5 ton sizes with R-454B refrigerant, this unit is optimized for both open and closed loop geothermal installations. Trust West Coast Geothermal—your local authorized Canadian dealer—to design and install a system tailored to your home's comfort and efficiency goals.
- Model: 504W11
- Series: 5 Series
- Sizes Available: 4 & 5 ton (048 & 060)
- Efficiency: Up to 3.3 COP / 16.1 EER (Closed Loop), 3.9 COP / 20.1 EER (Open Loop)
- Refrigerant: R-454B (Low GWP)
- Compressor: Copeland vapor injection scroll, double isolation mounted
- Cabinet: Compact footprint with field-convertible front or back water connections
- Heating Stages: Single-stage heating and cooling
- Controls: Aurora Premium Controller with performance and refrigeration monitoring
- OptiHeat® Technology: Delivers up to 145°F water output—ideal for retrofit cast iron radiator systems
- ENERGY STAR® Certified
- Quiet Operation: Includes discharge muffler and double isolation for noise reduction
- Symphony® & Amazon Alexa® Compatible
Description
The WaterFurnace 5 Series® 504W11 is a state-of-the-art water-to-water geothermal heat pump designed for radiant, hot water, and hydronic applications. With innovative OptiHeat® Vapor Injection technology, it can deliver water temperatures up to 145°F—making it ideal for radiant floor systems, baseboard radiators, snow melt, and pool/spa heating. Built with energy efficiency, quiet operation, and long-term reliability in mind, the 504W11 offers unmatched geothermal performance for both heating and cooling.
West Coast Geothermal is proud to be an authorized Canadian dealer for WaterFurnace. We supply and install this model with full service support across residential and light commercial applications in British Columbia.
| Specification | Details |
|---|---|
| Model | 504W11 |
| Series | 5 Series |
| Sizes | 4 to 5 ton single speed (2 sizes) |
| Efficiency1 | Up to 3.3 COP Up to 16.1 EER |
| Refrigerant | R-454B |
| Compressor | Vapor injection scroll (single speed) |
| Blower | Not applicable |
| Cabinet Configuration | Compact unit with front water connections Controls are field convertible from front to back |
| Stages | 1 heat 1 cool |
| Controls |
Aurora Premium Controller with energy, performance and refrigeration monitoring Onboard diagnostics HydroZone and HydroStat compatible Symphony compatible |
| Air Coil | Not applicable |
| Hot Water Generation | Not applicable |
| Auxiliary Heat2 | Not applicable |
| Zone Control3 | Not applicable |
| ENERGY STAR® Certified4 | Yes |
| LOW GWP | R-454B refrigerant — low Global Warming Potential |
