Shield GF Gas Heater Information
(for propane and natural gas heaters)
Back to Sterling Heaters
Additional Sterling GF Gas Heater Information
Sterling GF Heater
Specs. & Dimensions (PDF file)
Sterling GF Heater
Installation Manual (PDF file)
Sterling GF Heater Available Models
1. Stainless Steel Case
The Shield GF series heater is the only unit heater that comes standard with the
complete outer shell constructed out of stainless steel. What good is a stainless
steel heat exchanger if what holds it together is compromised by rust?
What makes the Sterling GF gas heater better?
2. Stainless Steel Tubular
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 GF gas heaters are equipped with a tubular heat
exchanger which consists of smooth, continuous tubes that are formed in a
serpentine shape and then placed in parallel rows. This 409 stainless steel heat
exchanger has no stress points (no points where the metal has been compromised)
and no welds to rust (Most heat exchangers that are welded together are welded
with metal that will rust even if the exchanger is made from a rustproof material)
making it more durable than a similar clamshell heat exchanger and allowing the
unit to be equipped with in-shot burners.
3. Advanced Burner Design
Sterling GF's burner design is more akin to that of a fire-tube boiler than a
unit heater. With these in-shot burners, 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 and are expensive to replace. This problem is eliminated with the
Sterling in-shot burner system.
Direct Power Exhaust
To ensure that your precious fuel dollars remain inside your greenhouse, warehouse,
etc. and dont end up going out the stack between heating cycles, the Sterling
GF heater is equipped with a high quality blower to eject the products of combustion
cleanly and completely. Since the exhaust blower is connected directly to the
heat exchanger, minimal heat is lost through the vent stack unlike heaters equipped
with clamshell exchangers. Horizontal venting also increases the heating efficiency
of the gas heater by eliminating gravitational stack losses of heated air inside
of the structure. The small cost difference between the Sterling GF gas heaters
and conventional gravity stack units will typically be recovered in 12 months
or less. When the GF units are called upon to bring heat into your structure,
the induced draft fan will cycle on for approximately 30 seconds to prepurge
any unburned gasses and to create the proper pressure for operating the in-shot
burners. This fan operates at all times when the unit is running and will turn
off after the desired greenhouse temperature is reached and the gas valve is closed.
5. Easy Maintenance
Removable side panels
simplifies maintenance and suspension point adjustment. Sterling gas heaters are
also easy to maintain. Sensors and controls are located in a central enclosed
box mounted to the left hand side of the heater. This protects equipment from
the elements and simplifies checking and replacing parts. Other manufacturers
tend to place sensors and equipment throughout the heater making it necessary
to remove entire heater panels or climb to reach the top of the heater to check
6. LED Diagnostic System
Every Sterling GF gas heater has advanced diagnostic controls that monitor all
primary heater functions for dependable, worry-free operation. If the GF heater
doesn't start, a LED diagnostic light on the heater will flash indicating where
the problem occurred and makes fixing the problem quick and easy.
7. Automatic Ignition
115 volt power supply and 25 volt controls. Limit control shuts off main burner
to prevent overheating. Pilotless electronic direct spark ignition with safety
redundant gas valve. 100% safety shut-off with continuos retry. Heater is automatically
lit on call for heat, and there is no need to worry about the pilot blowing out
and needing to be manually lit again as with standing pilot igniters.
8. Advanced Safety
Sterling gas heaters come equipped with the most advanced safety sensors available.
Each sensor is wired to the LED diagnostic system. The terimal board will flash
when a safety sensor has been triggered and indicate which sensor (area of the
heater) needs to be checked.
Limit Control (Overheat Switch) - will shut off the gas to the heater should
excessive temperatures occur.
Flame Rollout Switch - will shut off the gas supply to the heater in the
event of flame rollout.
Pressure Switch - will shut off the gas supply to the heater in the event
of a problem with the venting system.
Clearances to Combustibles
|Non Access Side
Back to Sterling Heaters Pricing
Heating | Venting
| Misting | Lights | Controls
| Benches | Meters
Watering | Electrical
| Plastic | PVC | Books
| Containers | Other
380 Greenhouse Drive
Buffalo Junction, VA 24529
434-374-2706 Phone, 434-374-2055 Fax
888-888-9050 Toll Free
Copyright Aarons Creek Farms, Inc. All Rights Reserved.