New for NAB Show 2026, OptiLoad Heat Exchanger removes heat from transmitter buildings, improving efficiency and reducing HVAC burden for RF facilities
RAYMOND, Maine, March 25, 2026 — Dielectric, a leading manufacturer of broadcast antennas and RF systems, announces the expansion of its OptiLoad series with a new external heat exchanger system. The new solution, debuting at NAB Show 2026 (Booth C1446), extends the OptiLoad platform’s capabilities by moving heat generated by RF loads outside of transmitter buildings, improving thermal management, reducing noise and lowering HVAC requirements.
First introduced at NAB Show 2024, OptiLoad established a new standard for RF load systems by combining Dielectric’s proven water column load technology with intelligent monitoring and closed-loop cooling. The series expanded in 2025 with OptiLoad Light for lower-power TV systems and OptiLoad FM for radio applications. The addition of the OptiLoad Heat Exchanger continues that evolution, addressing a growing industry need for more efficient heat management in modern broadcast facilities.
“OptiLoad has always included an internal heat exchanger, but traditionally that heat was discharged into the transmitter room,” said Jacub Emery, Product Line Manager, RF Engineering for Dielectric. “With the new external heat exchanger, we can move that heat outside the building entirely. That’s a major advantage in warmer climates or any facility where HVAC capacity is a concern.”
The new system introduces a two-part architecture, with an indoor RF load unit connected via hoses to an outdoor heat exchanger. This design simplifies installation while giving broadcasters flexibility to manage heat more effectively.
“With high-power systems, you can be removing up to 80 kilowatts of heat from the room,” Emery added. “That translates directly into reduced HVAC load, smaller cooling systems, and meaningful cost savings in both infrastructure and ongoing operation.”
The OptiLoad’s integrated PLC architecture continuously monitors RF presence, coolant temperature, pressure, and system health, activating pumps and fans only as needed to maximize efficiency. The external heat exchanger model maintains these core capabilities while improving overall system performance:
• Removes heat from the transmitter building, reducing HVAC requirements
• Minimizes in-room noise by relocating fans outdoors
• Preserves closed-loop cooling for system protection and reliability
• Simplifies installation with a turnkey, roll-in solution
The system also includes built-in safety interlocks that protect transmitters by shutting down operation if coolant pressure drops below threshold levels or if temperatures exceed safe operating limits.
“Customers no longer need to design their own heat exchanger systems or integrate with transmitter cooling,” Emery said. “This is a complete, plug-and-play solution that streamlines planning, installation and operation.”
The introduction of the OptiLoad Heat Exchanger reflects Dielectric’s broader strategy to build a complete product family that serves the full range of broadcast applications.
“As with our antenna portfolio, the goal is to offer solutions for every type of broadcaster,” said Keith Pelletier, President, Dielectric. “Not every station has the same power levels, site requirements or environmental challenges. With OptiLoad, we’re building a portfolio where customers can choose the solution that best fits their operation.”
NAB Show 2026 attendees can see the full OptiLoad product line, including the original high-power system, OptiLoad Light, OptiLoad FM, and the new external heat exchanger configuration. NAB Show 2026 takes place April 19-22 at the Las Vegas Convention Center.
About Dielectric
Based in Raymond, Maine, Dielectric LLC is a wholly owned subsidiary of Sinclair Broadcast Group. Dielectric is a leading provider of innovative broadcast products. The company has been building and delivering antennas and RF systems optimized for every TV and FM radio broadcast need since 1942. Dielectric is an innovative, customer-centric organization with a long history of engineering excellence in designing and manufacturing high-quality broadcast solutions. As a trust partner of broadcasters worldwide, Dielectric maintains its legacy of advanced, precision RF solutions while building in features that prepare broadcasters for the future. More information can be accessed at www.dielectric.com.
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