The OAHU provides clean air for the plant’s administration building. The two intake-air stacks retrieve air at 40 feet above the grade which has a concentration of hydrogen sulfide (HS) approximately 90% less than at the grade level.

The air is scrubbed of the HS, dried, processed with neutral humidity, and released into a building’s air distribution duct system and then exhausted as one-pass air.

Outside air handling unit equipment and systems:

• Fan wall with six fans
• Two heating water pumps
• Two electric boilers
• One electric water heater
• Two pre-cool coils
• Two post-cool coils
• Two pre-heat coils
• Two Re-heat coils
• Four carbon filter racks