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| VCG CO2 generators | VCG-6 (1) burner operating | VCG-6 (2) burners operating | VCG-27 (2) burners operating | VCG-27 (5) burners operating | VCG-27 (7) burners operating | VCG-27 (10) burners operating | |||
| Electronic ignition (no open pilot flames) | Yes | Yes | Yes | Yes | Yes | Yes | |||
| Dual redundant electrical solenoid valves | Yes | Yes | Yes | Yes | Yes | Yes | |||
| Tip-over switch (shuts unit off if tipped over) | Yes | Yes | Yes | Yes | Yes | Yes | |||
| Variable CO2 output | Yes | Yes | Yes | Yes | Yes | Yes | |||
| Comes in either Propane or Natural Gas models | Yes | Yes | Yes | Yes | Yes | Yes | |||
| Recommended for 128 cubic foot space or less | Yes | Yes | OK | OK | OK | OK | |||
| Recommended for 128 - 384 cubic foot space | No | Yes | Yes | OK | OK | OK | |||
| Recommended for 384 - 960 cubic foot space | No | No | No | Yes | OK | OK | |||
| Recommended for 960 - 1792 cubic foot space | No | No | No | No | Yes | OK | |||
| Recommended for 1792 - 3200 cubic foot space | No | No | No | No | No | Yes | |||
| 3-year warranty | Yes | Yes | Yes | Yes | Yes | Yes | |||
| * To calculate the growing area's cubic feet, multiply the width x length x height of the area. | |||||||||
| * Both the VCG-6 and VCG-27 can operate (2) burners. Since the VCG-27 has (10) burners as compared to the VCG-6 which has only (2) burners, if expansion is planned, choose the VCG-27. Remember that each burner produces about 3000 BTU of heat. Make sure you account for the extra heat while planning the cooling requirements for the growing area. Running more burners will increase CO2 levels faster, but will also heat the growing area faster. Use only as many burners as necesary to raise the CO2 level to the desired level in 10 minutes. | |||||||||