This is a sources sought notice for market research only; FBOP anticipates a firm-fixed-price construction solicitation to replace boilers at FDC Philadelphia, located at 700 Arch Street, Philadelphia, PA 19106. The contractor will remove and dispose of three existing Unilux hot water boilers and furnish/install three new Unilux ZF-1000W-FE boilers (brand name or equal) with dual-fuel burners and controls, including piping, breeching, electrical, BAS connections, hydrostatic testing, start-up, and commissioning, while keeping one boiler operational at all times. The estimated magnitude is between $1,000,000 and $5,000,000, and the applicable NAICS is 238220 with a $19.0 million small-business size standard. FBOP is seeking small business prime contractors only; interested firms should have active SAM.gov registration and may need to request access to controlled documents. A solicitation synopsis will be posted at a later date, and interested bidders should monitor SAM.gov for future updates.