Global AC drives manufacturer Vacon has signed a three-year supply agreement with Virginia-based Bristol Compressors International Inc. The supply agreement covers design and manufacture of AC drives that will be used to control Bristol Compressors' Benchmark VStar variable speed compressors. "This partnership with Bristol Compressors allows Vacon to strengthen its foothold in North America in the high-volume residential HVAC marketplace which is an exciting growth opportunity for Vacon," says Tom Doring, President, Vacon North America. "This new compressor represents a major technical leap forward in efficiency and sound reduction, and we are excited to be part of the overall solution".