This is a Sources Sought notice for market research purposes only, not a solicitation. The requirement involves replacing an Air Handling Unit (AHU) and associated components at March ARB, including demolition, mechanical, plumbing, electrical, and controls work. The performance location is March ARB, and the work must include a five-year full warranty on parts and labor. A three-month review period for the crane lift plan must be factored into the schedule. The government is seeking interest from small businesses under NAICS code 238220, with a size standard of $19M.