Sterling Tubular Heat
Exchanger
Other unit heaters available today are designed with the old clamshell style heat
exchanger, positioned above ribbon-style burners. These are the most common points
of failure, especially in the greenhouse environment. Heat exchangers invariably
fail at the points where manufacturing processes have weakened the metal by stamping,
crimping and welding. Sterling GG gas heaters are equipped with a
tubular heat
exchanger which consists of smooth, continuous tubes are formed in a serpentine
shape and then placed in parallel rows. This type of heat exchanger has no stress
points, no points where the metal has been compromised making it more durable
than a similar clamshell heat exchanger and allowing the unit to be equipped with
in-shot burners.
Sterling Advanced Burner Design
Sterling GG's burner design is more akin to that of a fire-tube boiler than a
unit heater. With this in-shot burner, the flame is retained inside the heat exchanger
and fires down the inside of the heat exchanger tube. This design accomplishes
three things: First, it eliminates the need for separate conventional ribbon-style
burners; Second, it enhances flame quality and heat transfer; and Third, it eliminates
most burner corrosion problems. Conventional burners fail when moisture from condensation
drips on them. This problem is eliminated with the Sterling in-shot burner system.
Sterling Control System
Single Stage, Direct Spark Ignition, 100% Shutoff with Continuous Retry
- Utilizes a single stage combination gas control with built-in ignition control. Gas
is lit with an electronic direct spark igniter on call for heat. Most gas heaters
have pilot flames which must stay lit all the time for the heater to perform. This
igniter comes on only when heat is needed
every time heat is needed! 115
volt power supply and 25 volt controls.