The City of Shelton is soliciting competitive sealed bids to provide comprehensive heating, ventilation and air‑conditioning (HVAC) services for its Water Pollution Control Plant (WPCP) and five associated pump stations. The contractor must supply labor, materials, equipment, routine maintenance, emergency response (within 4 hours), and repairs for six rooftop units, boilers, hot‑water heaters, instant demand heaters, and exhaust fans. Service is required on a scheduled basis plus holidays and emergencies, with billing on an itemized time‑and‑materials basis. The contract’s pricing schedule is fixed for one year after award and may be extended up to a total of three years by mutual agreement. Bids must be submitted electronically by October 16, 2026, 11:00 am; questions are due by October 12, 2026. No pre‑bid meeting is required. • Scope: HVAC preventive maintenance, repairs, and emergency service for municipal wastewater treatment facilities. • Locations: Main plant (10 Riverdale Ave, Shelton, CT) and five pump stations throughout Shelton. • Response format: Electronic submission via OpenGov portal; required certifications include non‑collusion affidavit, insurance certificates, licenses, and experience references. • Evaluation: Lowest responsible bidder meeting specifications, experience, and compliance with safety, insurance, and non‑discrimination requirements.