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#51 Natural Gas Digital Polymer Heater 360K BTU
#51 Natural Gas Digital Polymer Heater 360K BTU
Engineered for durability and precision, the Rheem #51 360K BTU heater offers powerful natural gas heating with digital control and weather-resistant design.
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The Rheem natural gas heater is designed for the highest level of performance, and made quality-made parts at every level. The heater features protective measures against all types of damaging factors including weather, environmental factors and temperature. The stainless steel and aluminum protect heat-sensitive areas, while cutting edge technology ensures that water is heated to your specific preferences.

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Customers highlight the heater's strong construction and its ability to hold up under constant use in various weather conditions.
Buyers find the digital control system user-friendly and precise, making temperature adjustments simple and reliable.
The fast heating performance impresses pool owners looking to maintain consistent warmth during cooler seasons.
Many users praise the durable materials and polymer housing that protect the unit from rust and external damage.
Homeowners consider it a smart investment for long-term performance with minimal upkeep.

- 360,000 BTUs: Rapid, high-capacity heating for large pools or spas
- Natural Gas Operation: Energy-efficient and reliable heat delivery
- Digital Controls: Precise temperature management and system monitoring
- Polymer Headers: Added durability and weather resistance
- Stainless Steel Protection: Shields heat-sensitive areas from damage
- Aluminum Construction: Enhanced corrosion resistance and longevity
- All-Season Performance: Withstands temperature changes and weather exposure
- Rugged Design: Ideal for demanding environments
- Eco-Conscious Build: Built for performance with sustainability in mind

- Model: Rheem #51 Natural Gas Digital Polymer Heater
- Heating Output: 360,000 BTU
- Fuel Type: Natural gas
- Control System: Digital interface
- Construction: Polymer headers, stainless steel, and aluminum
- Installation Type: Outdoor
- Application: Pools and spas
- Weather Protection: Built-in environmental resistance
- Dimensions: Manufacturer standard – compact yet powerful footprint


Q: Is this heater suitable for large pools or spas?
Yes, with 360,000 BTUs, it can heat large pools or spas quickly and maintain temperature efficiently.
Q: Does the digital control system require external controllers?
No, the built-in digital controls provide all temperature and monitoring functions in a single unit.
Q: How weather-resistant is the Rheem #51 heater?
It’s built with corrosion-resistant polymer, aluminum, and stainless steel to withstand tough environmental conditions.

Pool heaters and heat pumps are not returnable once installed or connected. Double-check fuel type, voltage, and sizing before installation.

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Rheem is known for manufacturing high-efficiency pool and spa heaters that deliver consistent, reliable performance. Designed for energy savings and durability, Rheem heating systems help you maintain the perfect water temperature all season long. At AquaDoc, we carry a full range of Rheem pool heaters to keep your swimming pool or spa warm, comfortable, and ready when you are.
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