Therma Grow™ Greenhouse Heaters

Therma Grow™ greenhouse heaters

Advanced greenhouse heater technology

Therma Grow™ greenhouse heaters utilize exclusive, L.B. White Plant-Safe Technology™, the only greenhouse heater certified to the stringent greenhouse emissions standards.

Therma Grow forced air heater used for a greenhouse facility.

20% better fuel efficiency than traditional greenhouse heaters

Therma Grow™ greenhouse heaters are advanced, clean-burning, direct fired models that offer 20% better fuel efficiency than traditional greenhouse heaters. So when comparing thermal conversion or seasonal (year-round) efficiency, the Therma Grow™ greenhouse outperforms even the most advanced competitive products and it does so for less money.

Greenhouse heater 10-year factory warranty

An industry-best on propane gas and natural gas greenhouse heaters

Therma Grow™ greenhouse heaters carry an unheard of 10 year warranty on the heat chamber and case, and have completely enclosed and protected components, making for years of trouble-free heating. The design combines efficiency, advanced performance, and long component life to reduce energy and maintenance costs, and help grow profits. These units can be mounted either inside or outside; giving growers flexibility and the ability to free up grow space.

L.B. White is the pioneer in direct fired heaters and with 50 years of perfecting every aspect of our design which has led to our reputation for reliability, durability and serviceability.

When the fate of your plants is at stake…you want the rising star in Greenhouse heating protecting your investment… L.B White.

Therma Grow forced air heater inside a greenhouse facility.

Technical Support – 608-779-6160

Key features of the Therma Grow™ Greenhouse Heater

  • 10 year warranty against heat chamber and case corrosion
  • Two output sizes, 120,000 Btuh and 220,000 Btuh
  • Meet all OSHA emissions requirements for greenhouses.
  • Plus models provide even greater heat management features including 2-stage temperature control and heating and air circulation modes.
  • Dependable, fuel efficient hot surface ignition
  • Quick response, on-demand heat using Hot Surface Ignition
  • Easy integration with building controls
  • 100% test fired at our plant
  • High elevation models available. (Please specify elevation while ordering.)

Warning: Cancer and reproductive harm. See


Specifications, features, and more for Therma Grow™ Greenhouse Heaters.


Schematics, setup instructions, and more for Therma Grow™ Greenhouse Heaters.


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