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BioTherm Announces New Partnership with RBI Boilers

By BioTherm Solutions|June 9, 2025

BioTherm has announced a new strategic partnership with RBI Boilers, introducing a new generation of high-efficiency, on-demand boiler systems to the controlled environment agriculture (CEA) market.

This advanced boiler line offers capacities up to 10 million BTUs (2930 kWh), making it ideal for greenhouse operations of all sizes. Each system is designed with a cascade strategy in mind, where multiple boilers share the energy load to ensure operational reliability, energy efficiency, and a fail-soft/safe backup in case of unit downtime.

Condensing boilers and heaters.

Condensing boilers and heaters. | BioTherm and RBI Boilers

“These aren’t just boilers — they’re smart systems,” says Jim Rearden, President of BioTherm. “By incorporating cascade capabilities and on-demand performance, these units respond exactly when growers need them, without wasting fuel or energy.”

The low-mass design allows for rapid heat-up and cool-down, operating at lower water temperatures that improve plant health and compatibility with alternative energy sources like heat pumps and solar thermal. Additionally, growers can incorporate CO₂ enrichment by capturing boiler exhaust, creating a dual-purpose solution that supports both heating and photosynthesis.

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RBI Boiler Capabilities

i 120 MBTU (35k kWh) Boiler Room Design.

i 120 MBTU (35k kWh) Boiler Room Design. | BioTherm and RBI Boilers

RBI boilers offer a range of features ideal for horticultural and CEA applications, including:

  • Compact, space-saving designs.
  • High-efficiency condensing and non-condensing models.
  • Low-temperature operation for energy savings and crop performance.
  • Modulating and cascading capabilities for system flexibility.
  • On-demand heat delivery with no fuel wasted maintaining thermal mass.
  • Seamless integration with BioTherm’s hydronic heating, irrigation tempering, dehumidification, and CO₂ systems.

BioTherm Upcoming Events

BioTherm will be exhibiting at Cultivate in Columbus, OH (Booth 217). BioTherm welcomes the opportunity to answer your questions, explore your heating needs, and show how these new boiler solutions can elevate your growing environment.

For more information about BioTherm’s new boiler offerings and how they can benefit your facility, visit www.biothermsolutions.com or contact your BioTherm representative.

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BioTherm is an agricultural engineering company based in Cotati, CA, that designs heating, cooling, dehumidification, and irrigation systems for greenhouse operations. See all author stories here.