The Indian Health Service's Chinle Comprehensive Health Care Facility in Chinle, Arizona is conducting market research to identify capable vendors for quarterly delivery of MERV 8 and MERV 14 air handling unit filters. This is a sources-sought notice, not a solicitation, and responses are voluntary, with the government assuming no financial responsibility for costs incurred. Indian-owned economic enterprises (large or small) will be given first consideration under the Buy Indian Act, followed by other small business set-aside programs. The applicable NAICS code is 333413 with a 500-employee size standard. Interested contractors must be registered in SAM.gov and would need to provide company capabilities, past performance, and an IEE representation form for Indian-owned firms.