Spring Garden Township, directly south of York, is headquarters to York International, a Johnson Controls Company and one of the largest suppliers of HVAC systems in the United States. On February 2, 1998, a massive explosion occurred at the York International plant. A spark had set off a leak in the nearby propane storage house. The blast was felt up to 25 miles away, and blew out windows nearby as well as knocking down doors. About 20 people were injured in the blast and one person was killed, as the explosion occurred during a shift change.