Blast Chiller Vs. Standard Chiller For Food Processing: When Each Is Right August 4, 2026 'Blast chiller' and 'chiller' are not interchangeable terms in commercial food production — they describe different equipment designed for different applications. Understanding the distinction, and selecting the right equipment for each cooling task in your operation, directly affects both food safety compliance and operational efficiency. What Is a Blast Chiller? A blast chiller is designed specifically for rapid product cooling — moving food from hot cooking temperatures to safe refrigerated temperatures within defined time windows. They use high-velocity cold air (or sometimes cryogenic methods) to maximize the rate of heat extraction from food product. Key characteristics: Designed for rapid, high-capacity heat extraction from product Air velocity is typically 1,000-2,000+ feet per minute (much higher than standard refrigerated spaces) Temperature settings typically range from 32-40 degrees F for blast chilling to -40 degrees F for blast freezing Units are designed for batch or continuous-flow operation, not for holding product at stable temperatures What Standard Commercial Chillers Do Standard process chillers produce chilled water or glycol that serves refrigeration equipment, air handling units, cooling coils, jacketed vessels, and other heat transfer applications throughout a food processing facility. They are: Central cooling equipment — they produce chilled water, not air Designed for sustained, continuous operation across multiple loads Not designed for direct product contact or rapid food cooling A standard chiller is the upstream supply for a blast chiller — the chiller produces the chilled water or glycol that the blast chiller's refrigeration system uses. Blast Chiller Standard Process Chiller Direct food cooling equipment — food goes into the blast chiller Produces chilled water or glycol that serves cooling equipment High-velocity air at low temperature cools food rapidly Serves multiple loads throughout the facility Designed for time-temperature regulatory compliance Not a direct food contact device Selected based on product throughput and required cooling rate Selected based on total facility cooling load Often batch equipment with specific cycle times Continuous operation; serves loads simultaneously "They work together, not instead of each other. The process chiller is what makes the blast chiller work. Sizing the chiller to handle blast chiller loads — which are large and intermittent — is where the engineering actually happens."— Paul Johnson, G&D Chillers Sizing the Chiller Plant for Blast Chiller Operation Blast chillers create large, intermittent loads on the chiller plant. When a batch of hot product enters a blast chiller, the heat extraction rate spikes dramatically. Key sizing considerations: Peak load during blast cycle: calculate BTU/hr during peak heat extraction, not average over the full cycle Simultaneous blast cycles: if multiple blast chillers can operate simultaneously, the chiller must handle the combined peak Thermal mass in the system: chilled water storage can buffer blast chiller peak loads, reducing required chiller capacity Frequently Asked Questions Can I use a blast chiller for long-term product storage? No — blast chillers are not designed for holding product at stable temperatures. They're optimized for rapid heat extraction. Once product reaches target temperature, it should be transferred to a refrigerated holding room or cold storage. Running a blast chiller as a holding cooler wastes energy and reduces the unit's effectiveness. What chiller supply temperature does a blast chiller require? Most commercial blast chiller refrigeration systems operate with their own self-contained refrigeration, not on a chilled water loop. However, large-capacity blast chillers in central systems connect to chilled water supply. Required supply temperature depends on the blast chiller manufacturer specification — typically 35-40 degrees F for standard blast chilling applications. > Size your chiller plant for blast chilling loads -> Contact us