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The Hoffman Enclosures Inc. G521216G100 is a Spectracool MCLG 1-Phase outdoor enclosure air conditioner designed for NEMA 3R/4/12 rated enclosures. It provides 12,000 Btu/hr cooling capacity with 3,500 Watt power consumption. The unit operates on 115 VAC at 21 A and supports 50/60 Hz frequencies. Constructed from steel in light gray, the physical dimensions are 52.69 inches in length, 17.12 inches in width, and 11.66 inches in height.
Verify that the target enclosure meets NEMA 3R, 4, or 12 rating requirements to ensure compatibility with this specific air conditioning unit. Confirm that the facility power supply matches the 115 VAC, 21 A, single-phase specification and supports both 50 Hz and 60 Hz operational frequencies. Ensure the physical cutout dimensions within the enclosure align with the unit's external measurements of 52.69 x 17.12 x 11.66 inches before finalizing procurement orders.
Select this model when significant heat dissipation is required for large enclosures housing high-density electronic components. The 12,000 Btu/hr output distinguishes it from lower-capacity units suitable for smaller panels. Consider the steel construction and light gray finish for durability and environmental resistance in harsh outdoor settings where corrosion protection is critical for long-term operational reliability.
This component belongs to the Hoffman Spectracool series, which specializes in active cooling solutions for industrial enclosures. The G521216G100 variant represents a high-output option within the MCLG line, designed to maintain internal temperatures below ambient levels. It complements passive ventilation systems by providing active refrigeration capabilities for applications where natural airflow is insufficient.
No public confirmed substitute part numbers are available.

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