Air Cooled Screw Chiller AirBoost 316 1449 kW Variable Speed Screw Triple Free Cooling R134a GWP 1430 R513A GWP 631 T3

If your organization has committed to net-zero targets or faces tightening energy regulations, the AirBoost air-cooled screw chiller with triple free cooling represents the largest annual carbon reduction available from a single equipment decision. By combining air-side free cooling, water-side free cooling, and desuperheater heat recovery, the AirBoost eliminates 30-50% of annual cooling energy consumption compared to conventional air-cooled chillers while simultaneously eliminating boiler fuel requirements for domestic hot water.
The carbon impact is substantial and measurable. For a 1,000 kW cooling load in a temperate climate, the triple free cooling effect reduces annual electricity consumption from approximately 1,200,000 kWh to 600,000-840,000 kWh—a reduction of 360,000-600,000 kWh per year. At the global average grid emission factor of 0.4 kg CO₂/kWh, this equals 144-240 tonnes of CO₂ avoided annually per chiller, equivalent to planting 6,000-10,000 trees.

When ambient temperature drops below the chilled water setpoint, the AirBoost uses outdoor air directly through a dedicated coil. The compressor stops entirely, providing 100% of cooling needs for 3-5 months per year at near-zero energy cost in temperate climates.

• 3-5 months of zero-compressor cooling with verifiable near-zero energy periods
• No electricity consumed during free cooling operation
• Direct Scope 2 emission reduction certifiable under ISO 50001
• Dramatic quarterly energy reduction visible in utility data
• Each unit avoids 144-240 tonnes CO₂ annually
• Zero cooling energy cost during free cooling months

During transition seasons, the water-side free cooling mode provides elevated-temperature cooling at only 20-30% of full-load power consumption, extending the low-energy season by an additional 2-3 months.

• 20-30% power consumption during shoulder seasons
• Extends low-energy season by 2-3 months beyond air-side free cooling
• 5-8 months of significantly reduced energy consumption per year
• Graduated efficiency adapting to changing conditions
• Measurable quarterly improvement in energy bills
• Reduced peak demand charges during transition periods

The desuperheater captures waste heat from compressor discharge gas, transferring it to domestic hot water circuits at 45-55°C, eliminating or dramatically reducing boiler fuel consumption.

• Free hot water production whenever cooling runs
• Direct Scope 1 emission reduction from eliminated boiler fuel
• 12-month operational benefit, not limited to shoulder seasons
• Particularly impactful for hotels and hospitals where domestic hot water represents 20-30% of total energy
• Dual Scope reduction addressing both electricity and gas emissions
• Measurable ROI with gas bill reductions often justifying the system in 2-3 years

The variable-frequency drive on twin screw compressors provides continuous, stepless capacity modulation, consuming 25-35% less energy than fixed-speed equivalents at typical part-load conditions.

• 25-35% part-load energy savings versus fixed-speed screw compressors
• Continuous modulation without inefficient step-loading or cycling
• Soft starting reduces demand charges from lower peak electrical draw
• Power factor > 0.95 minimizes reactive power and utility penalties
• Combined annual savings of 30-50% when combined with free cooling and heat recovery
• Predictable energy data for accurate carbon modeling

The AirBoost offers R134a and low-GWP R513A refrigerant options, with R513A providing a 56% reduction in global warming potential while maintaining non-flammable A1 safety classification.

• R513A with GWP 631 – 56% lower than R134a's GWP of 1,430
• Non-flammable refrigerant eliminates need for special safety infrastructure
• Drop-in compatible replacement for R134a systems
• F-Gas compliant meeting EU regulations through 2030+
• Quantifiable GWP data for lifecycle carbon models
• Clear migration path for future regulatory compliance

The AirBoost's BMS integration provides granular energy data needed for carbon reporting, automatically feeding real-time consumption data into carbon accounting platforms.

• Automated energy data collection eliminates manual meter reading
• Verified Scope 2 data for electricity consumption calculations
• Verified Scope 1 offset documentation for gas savings from heat recovery
• CDP/GRI/TCFD audit trail for disclosure frameworks
• Error reduction through automated data collection
• Real-time carbon visibility for immediate impact assessment