Not available on Non-combustible locker models.
• For optimum temperature control, the appropriate size R-11 insulation package must be ordered when unit is purchased in conjunction with fire-rated models.| Justrite 12, 16 Drum (387, 506 Cu Ft), 20, 000 BTU Explosion Proof Air Conditioner for Outdoor Safety Lockers, Bone, 915307 • This accessory must be purchased in conjunction with a locker to ensure proper installation and to retain FM-approval. Justrite 12, 16 Drum (387, 506 Cu Ft), 20, 000 BTU Explosion Proof Air Conditioner for Outdoor Safety Lockers, Bone, 915307 Explosion-proof, 20, 000 BTU air conditioner. For use with 6- and 12-drum fire-rated or 205- and 296-cu ft Agri-Turf™ lockers only.