HOTSPOT ENERGY Solar Air Conditioning
Heat Recovery Water Heating & Pool Heating
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Pool Temperature Controls For Heat Recovery

Our pool heating systems are based on recovering free heat from air conditioners and directing the recovered heat into the pool. The system controller manages the operation of the the valves and heat exchangers in the system. 

FPH Control System:

pool heater controller
Digital Dual PID Controller

• Platinum/titanium RTD pool temperature sensor (Heraeus)

PT100 Platinum titanium pool water temperature sensor, Heraeus (Germany)Platinum RTD Sensor
• UL/NEMA outdoor rated control unit with digital temperature controller.
• Supports standard and variable speed pool pumps.
• Dual controller available for using two air conditioners.

Enter the desired pool temperature set point and the controller manages the heat recovery system, making sure you get all available heat while ensuring that your pool does not get warmer than you like. When the pool temperature is below the set point, heat recovery is enabled. Above the set point, heat recovery will be disengaged. Hysteresis programming logic prevents cycling.

The standard pool heat controller will not turn your AC on or off, the AC operation is controlled by your indoor thermostat in the normal manner. The FPH controller simply decides whether available heat needs to go into the pool or be rejected in the normal condenser, and manages the valves and relays needed for operation. The controller will turn on the pool pump if it's needed and not already running.

The FPH system safely switches the system between the air cooled condenser (normal) and the water cooled condenser (pool), automatically evacuating any leftover refrigerant from the idle condenser.

For heating pools, and beyond - if you can think of it, we can probably do it.
Our controls can precisely manage heat recovery from air conditioners and large refrigeration/freezers, supporting a wide range of applications such as pool heating, hydronic building heat, boiler pre-heating, and more.

Heat recovery control unitNEMA4 Outdoor
Control Unit


Download FPH Spec Sheet

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HotSpot Energy Inc. | 4021 Holland Blvd. | Chesapeake VA 23323 | 757-410-8640
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