The Rheem 156A Natural Gas 150K BTU Digital Pool Heater is the perfect choice for larger above-ground pools, spas, and inground pools. With up to 50% more BTUs than competitors, it delivers faster heat-up so you can enjoy your pool sooner. The Rheem gas heater features a polyester-coated, non-corrosive cabinet that is more durable than solvent-borne and waterborne-coated metal cabinets. Its wind-resistant design helps protect the unit from outdoor elements that can impact ordinary pool and spa heaters. The natural gas model is ready for elevations between 0–5,000 ft. above sea level with no adjustments required. The Rheem 156A comes standard with Rheem’s proprietary AFT digital control system, which manages all safety functions, electronic ignition, and flame supervision. It also provides advanced diagnostic reporting and fault recording—technology shared with larger Rheem gas heaters—ensuring dependable and intelligent performance. Designed for convenience, the Rheem 156A includes an automatic bypass that accommodates varying water flow rates without overheating, eliminating the need for manual adjustments. The durable burner tray is constructed from stainless steel and aluminized metals in heat-sensitive areas and is designed for easy removal during servicing. A ceramic fiber combustion box enhances efficiency while keeping the outer cabinet cool, allowing installation without additional heat protection. The Rheem 156A is built to extend your pool season, giving you more time to enjoy your investment with reliable, consistent heating performance.

• 150,000 BTU heating capacity
• Designed for larger above-ground pools and inground pools
• Natural gas model (0–5,000 ft. elevation ready with no adjustments)
• Polyester-coated, non-corrosive cabinet for long-lasting durability
• Wind-resistant design for reliable outdoor performance
• Copper-based heating element
• Proprietary AFT digital intelligent control system
• Electronic ignition with flame supervision and safety controls
• Advanced diagnostic reporting and fault recording
• Built-in automatic bypass for varying water flow rates
• Stainless steel and aluminized burner tray for durability
• Easy-access burner tray for servicing
• Ceramic fiber combustion box for efficiency and cooler outer cabinet
• Compact design for flexible installation