Replace Domestic Hot Water System at Chief of Mission Residence in Prague

Subject: Domestic Hot Water System Replacement The U.S. Department of State seeks qualified contractors to replace the domestic hot water heating system at the Chief of Mission Residence (CMR) in Prague 6, Czech Republic. The estimated project value is above $25,000 USD. Instructions to Vendors: Vendors shall replace the existing domestic hot water system consisting of nine (9) tankless gas water heaters located in the attic with a more suitable system consisting of three (3) gas condensing boilers and three (3) 150-liter hot water storage tanks. The current system, installed approximately 15 years ago, does not adequately meet demand or ensure sufficient water pressure. The replacement system shall improve performance, efficiency, and reliability. Reference equipment (or equal): Vaillant VU 246/5-3 ecoTEC system (2.8–26.4 kW), VIH R 150/6B hot water tanks, associated piping, valves, controls, and KORADO RADIK KLASIK radiators (3 pcs). The Contractor shall utilize existing infrastructure to the greatest extent possible, including piping, gas supply, and structural supports. The project includes removal of existing units (Rinnai REU-KM2635FFUDHD-E), installation of new equipment, and capping unused flues within the attic space. The location of the project is Prague 6, Czech Republic. All inspections shall be coordinated through the Facility Manager (FM) or

Contracting Officer Representative (COR). Vendors shall complete the work expeditiously, as the structure may be occupied during the execution of this contract. Coordination with the COR for work phasing and sequencing is required. Vendors shall submit a phasing plan and construction schedule for approval prior to commencement of work. The Contractor shall provide all labor, materials, tools, equipment, supervision, and management necessary to: Remove existing tankless water heaters (Rinnai REU-KM2635FFUDHD-E) Install three (3) gas condensing boilers Install three (3) 150L domestic hot water storage tanks Connect to existing gas, water, and distribution systems Modify and cap unused flues (within attic space only) Utilize existing structural supports and infrastructure Preserve existing piping systems to the maximum extent possible The work is limited to equipment replacement and does not involve structural modifications to the historic building. SITE CONDITIONS Work will be performed in an occupied facility Work must be coordinated with the

Contracting Officer’s Representative (COR) The building is historic; however, the work area (attic) does not contain sensitive finishes Structural capacity and utilities are sufficient for the proposed system PRE-PROPOSAL SITE VISIT A site visit is mandatory - March 25, 2026 at 9 am.

SUBMITTAL

REQUIREMENTS Interested contractors shall submit: Firm Fixed Price Proposal Construction Schedule Bill of Materials (BOM) Product Data and Technical Specifications Quality Control Schedule (QCS) Project Safety Plan (PSP) Evidence of experience (minimum 3 similar projects within last 5 years) Warranty (minimum 10-year installation guarantee)

EVALUATION CRITERIA Award will be made to the lowest priced, technically acceptable offeror. Evaluation factors include: Technical compliance with SOW Relevant past performance Price The work shall be completed within 21 days from Contract Award. Access to non-designated areas shall be limited and only permitted with Embassy approval. Vendors shall submit reports, bill of materials (BOM), product literature, drawings, specifications, quality control schedules (QCS), safety plan (PSP), and construction costs as required. Vendors shall not conduct any work beyond this Statement of Work (SOW) unless directed in writing by the