The MJ Box – Heater Demand Controller is designed to optimize the efficiency and performance of your pool or spa heating system. This advanced controller intelligently manages the power demand of your heater, ensuring that it operates within the available electrical capacity while maintaining the desired water temperature. By dynamically adjusting the heater’s power usage, the MJ Box helps prevent electrical overloads and reduces energy consumption, leading to lower utility bills and increased system longevity. The MJ Box is easy to integrate with existing pool or spa equipment and is compatible with a wide range of heaters, making it a versatile solution for both residential and commercial settings. With its robust construction and user-friendly interface, this controller offers reliable performance and peace of mind, ensuring that your heating system runs efficiently without unnecessary strain on your electrical infrastructure.

Specifications

Control Functionality:
- Intelligent power demand management for pool and spa heaters
- Dynamic adjustment of heater power usage based on electrical capacity
Compatibility:
- Supports a wide range of pool and spa heaters (electric, gas, heat pump)
- Works seamlessly with existing pool automation systems
Construction:
- Durable, weather-resistant housing for outdoor installation
- High-quality components designed for long-term reliability
Power Supply:
- Input Voltage: 110V/220V (depending on model)
- Low standby power consumption for energy-efficient operation
Connectivity:
- Integration with pool/spa controllers and other automation systems
- Optional Wi-Fi or Bluetooth connectivity for remote monitoring and control
Safety Features:
- Overload protection to prevent electrical system strain
- Built-in surge protection to safeguard against power spikes

Shipping & Returns

FREE* on orders over $79
Orders under $79 incur a flat fee
Stocked orders ship on the same day if placed by 1pm
Orders with multiple items can incur shipping fees
Standard Shipping Transit Times:
NSW: 1 – 3 business days
Other States 5 – 10 business days

SALE - 10% OFF

MJ Box – Heater Demand Controller

4.8 Star Avg Rating (247 Reviews)

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10 Years Warranty (Pro Rata)
Includes 5 years full warranty & 5 years pro rata (50% OFF retail price from year 6 to year 10)

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