Hot Water Systems • Replacement of existing 80-gallon hot water storage tanks. • Tanks must maintain minimum 60°C (140°F) for Legionella control, with system recirculation temperatures of at least 51°C (124°F). • Design must incorporate thermostatic mixing valves (TMVs) to ensure patient-accessible outlets do not exceed 43.3°C (110°F) and resident-area delivery temperatures remain within 105°F–120°F. • Design for redundancy, allowing the largest tank to be offline without loss of service. • Systems must support thermal eradication cycles capable of 77–82°C (170–180°F). • Provide corrosion-resistant tank materials and full recirculating loop design. • Provide monitoring capabilities for temperature, sanitation, and Legionella risk management. HVAC Systems • Replacement of existing HVAC units with systems meeting current hospital/caregiving requirements. • Systems must comply with FGI Guidelines and ASHRAE/ASHE 170 for ventilation, filtration, pressure relationships, and air change rates. • Provide appropriate MERV/HEPA filtration based on occupancy type. • Maintain infection-control pressure zones (e.g., positive pressure for treatment areas, negative pressure for isolation areas when applicable). • Provide integration with emergency power and ensure system reliability during outages. • Provide temperature, humidity, and airflow controls suitable for a healthcare environment, including provisions for inspection, certification, and regulatory compliance. Electrical • Electrical upgrades to support HVAC and hot water tank replacements, including emergency power coordination. • Compliance with NEC and healthcare electrical safety requirements.
