Flow Environmental Systems, Inc.

Flow Environmental Systems’ ANSWR™ CO₂ heat pump platform is a next-generation commercial HVAC&R solution designed to replace boilers, chillers, cooling towers, and domestic hot water systems with a single, highly efficient electric platform using natural refrigerant CO₂ (R-744). Available in modular 20TR, 60TR, 90TR, and 120TR configurations, the ANSWR can be deployed as either an air-source or water-source heat pump for multifamily, hospitality, healthcare, education, commercial, and industrial applications. The system delivers reliable heating at ambient temperatures as low as -40°F (-40°C), operates efficiently in extreme heat, and can supply hot water up to 180°F (82°C), enabling straightforward replacement of fossil-fuel boiler systems. Its patented simultaneous heating and cooling capability delivers industry-leading efficiencies with COPs exceeding 7 in certain operating modes. Unlike conventional heat pumps, the ANSWR eliminates traditional defrost cycles, reducing equipment footprint, simplifying system design, and lowering capital costs. The platform also pairs exceptionally well with geothermal systems, where its high temperature differentials can reduce required well field size by up to 80%, materially improving project economics. Using natural CO₂ refrigerant with a GWP of 1, the ANSWR also eliminates PFAS-containing synthetic refrigerants while delivering a future-proof HVAC solution.