Greenhouse Unit Heaters Redefined
The revolutionary tubular heat exchanger inside the Lennox LF-24 series of greenhouse heaters ensures you years of performance and high efficiency. Combustion is precise because of special "in-shot" burners and fan assisted exhaust. Equipped with a TrueLeaf Combustion Air Separator, it's bullet-proof.

Welded Steel

Heat Pipe Systems

From the beginning of the modern era of the greenhouse industry, simple pipes of cast iron or steel have been a standard way to deliver steam or hot water energy. Round steel heat-pipes remain the typical greenhouse heating delivery system in most of Europe and Canada. While we see part of our job as continuing to question the way things are done and use modern techniques like our Duofin™ or Starfin™ products to do better, these tried and true systems continue to have a solid place in the industry.

TrueLeaf has extensive experience in the application of these systems which can provide under-bench, perimeter, or top heating.

Using modern design techniques, our experienced engineers offer you a hot water heating system for any size greenhouse, small to huge.

Systems are assembled by means of welding, which provides a permanent, no leak connection. Most systems are installed by one of our travelling crews as they are able to do this work very quickly with an experienced eye toward crafting the application for your specific greenhouse heating needs.

We provide our welded pipe systems with the accent on meticulous and accurate design so your greenhouse enjoys even heat delivery throughout. Further, we assure you will have adequate capacity to hold proper temperatures through the coldest winter night.

But it wouldn’t be a TrueLeaf system if we did this without adding a twist of high efficiency design. While many of the old-fashioned systems use heavy-walled pipes and threaded or grooved connectors, we provide our systems with modern steel tubes with thinner walls. The thinner wall reduces thermal mass and improves response times.

Also, in areas of high heat loss, we’ll provide our pipes with integral fins that maximize the surface area and deliver much more heat per running foot.

Smoothly controlling a greenhouse heating system typically requires installation of a “mixing group” for each zone. This approach ensures that your system does not short-cycle and that the delivery of energy is provided smoothly through the entire heating period. Usually, the pump flows constantly, providing good flow throughout, while the mixing valve varies the water temperature supply from ambient to a maximum of 210°F and back to ambient.

Each system is provided complete with special paint that will protect the system for years with proper continuing maintenance. Also included are special galvanized brackets, hangers, and supports to complete the installation.