The non-polluting MiniMax Plus HP heat pump is so energy efficient, it will keep your pool comfortably warm for just pennies a day–that's far less than gas or electric heaters. And unlike most other American-made heat pump pool heaters, the MiniMax Plus HP uses R410-A refrigerant, the safe, clean, high performance refrigerant that will be available long after R-22 is phased out of production.

Additional features include:

• Dual thermostats offer precise temperature control to maintain the desired separate water temperatures in pool/spa combinations without overheating or wasting energy.
• Long-life corrosion-resistant composite cabinet stands up to severe climates and pool chemicals.
• High-efficiency TRANE™ compressor is the most energy efficient, durable, and quiet compressor available.
• Water to Water Source Heat Pump where air source is not applicable.
• Self-diagnostic control panel monitors and troubleshoots heat pump operations to ensure safe, dependable operation.
• Cupronickel heat exchanger with foam insulation resists external corrosion and heat loss.
• Compatible with Compool control systems
• 2-inch plumbing connections for easy installation
• Ten year compressor limited warranty; five year parts and labor limited warranty