Ducold Mechanical Ltd.

Ducold Mechanical Ltd. is an HVAC and refrigeration contractor based in West Islip, New York, serving both Nassau and Suffolk counties on Long Island. The company holds a perfect 5.0-star rating across 27 customer reviews, reflecting consistent service quality. Operating as a family-owned and insured business, Ducold handles residential and commercial projects including HVAC installation, repairs, and maintenance, along with specialized refrigeration work and ice machine services.

What distinguishes Ducold from competitors is their dual focus on both HVAC and refrigeration systems, a combination not all contractors offer. The company provides maintenance programs, emergency service availability, and handles exhaust and makeup air systems for commercial clients. Their service menu includes ice machine sales and repair, positioning them as a one-stop resource for businesses needing cold storage and climate control beyond standard heating and cooling.

Customer reviews highlight specific positive experiences with technicians Greg and Steve. One reviewer described how Greg provided same-day service when their central air failed during a heat wave, completing a full system replacement including ductwork and thermostat within 48 hours. Another review mentioned Greg and Steve arriving on July 4th during a holiday weekend to repair a customer's central air. Multiple long-term customers, some with 15+ year relationships, emphasize the technicians' reliability, knowledge, and honesty in their feedback.