Four Air specializes in designing and installing custom ammonia refrigeration systems for cold storage, food processing plants, ice factories, and large industrial operations.

Whether you're cooling water, heating glycol, or transferring energy between two process streams, our plate exchangers offer unbeatable performance and serviceability.

Whether used for cooling, heating, or condensing, our exchangers deliver unmatched reliability across a wide range of industries.

Ammonia (NH₃) remains the most energy-efficient and eco-friendly refrigerant for large-scale applications — offering unmatched thermal performance and zero global warming potential (GWP). We deliver turnkey systems with precision control, advanced safety features, and long-term reliability.