This is a total small business set-aside solicitation for HVAC replacement in the quarantine facility at the Western Regional Research Center. Site visits are scheduled for August 19 and 20, 2026, and interested contractors must register by email by August 18, 2026. Written questions must be submitted by August 26, 2026. The applicable NAICS code is 238220 with a small business size standard of $19 million. Attendance at a site visit is optional but not mandatory.