At NAB Show 2026, Dielectric will expand its OptiLoad series with a new external heat exchanger system.
The company will present the new solution at Booth C1446. The addition is designed to move heat generated by RF loads outside transmitter buildings. As a result, broadcasters can improve thermal management, reduce noise, and lower HVAC demand.
Dielectric first introduced OptiLoad at NAB Show 2024. The company later expanded the line in 2025 with OptiLoad Light for lower-power TV systems and OptiLoad FM for radio applications. Now, the new OptiLoad Heat Exchanger adds another option for facilities that need more efficient heat management.
External heat exchanger design
The new system uses a two-part architecture. It combines an indoor RF load unit with an outdoor heat exchanger connected through hoses.
According to Dielectric, this design gives broadcasters more flexibility in how they manage heat. It also simplifies installation compared with custom-built heat exchange arrangements.
Heat removal and HVAC reduction
Jacub Emery, Product Line Manager, RF Engineering at Dielectric, said OptiLoad has always included an internal heat exchanger, but the heat was traditionally released into the transmitter room. He said the new external heat exchanger moves that heat outside the building entirely. According to Emery, this is especially important in warmer climates and in facilities with limited HVAC capacity.
Emery also said high-power systems can remove up to 80 kilowatts of heat from the room. He said this can reduce HVAC load, allow smaller cooling systems, and lower both infrastructure and operating costs.
Monitoring and safety functions
Dielectric says the OptiLoad platform includes integrated PLC-based monitoring. The system continuously tracks RF presence, coolant temperature, pressure, and overall system status. It activates pumps and fans only when needed.
The external heat exchanger model keeps those same core functions. In addition, Dielectric says the system includes built-in safety interlocks. These are designed to shut down operation if coolant pressure drops below safe levels or if temperatures rise beyond operating limits.
Turnkey installation approach
Emery said customers no longer need to design separate heat exchanger systems or integrate them with transmitter cooling on their own. He said Dielectric developed the new OptiLoad configuration as a complete plug-and-play solution for planning, installation, and operation.
The company says the external heat exchanger also reduces in-room noise by moving fans outdoors while preserving the closed-loop cooling approach used across the OptiLoad line.
Broader OptiLoad strategy
Keith Pelletier, President of Dielectric, said the new product reflects the company’s larger goal of building a complete OptiLoad family for different broadcast requirements. He said not every broadcaster has the same power levels, site conditions, or environmental demands.
According to Pelletier, Dielectric wants customers to be able to choose an OptiLoad solution that matches their operation. At NAB Show 2026, attendees will be able to see the full line, including the original high-power system, OptiLoad Light, OptiLoad FM, and the new external heat exchanger version.
