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Danfoss extended its inverter scroll compressor range VZH to include three new models. The variable-speed VZH compressors provide superior efficiency at part-load conditions and offer improved efficiency and precise cooling capabilities. Designed for small rooftop and process cooling applications, the inverter scroll compressor range VZH will introduce cooling capacities between 4-6.5 TR with a single compressor, and up to 13 tons with a manifold configuration. With a permanent magnet motor and patented Danfoss Intermediate Discharge Valves (IDV), which can help improve part-load efficiency by up to 24 percent, the variable-speed compressor range VZH will facilitate efficiency ratings up to 21 IEER and can modulate from 15-100 RPS.