The municipal skating rink on Concord Avenue is closed until further notice due to an issue with the heating, ventilation, and air conditioning (HVAC) system, according to Rink Manager Erik Harrington. “It’s an issue with our dehumidifier,” Harrington said. “With these extreme temperatures in the high 90s, we anticipated the system may have to work a little harder but…with the condensation that builds up, it makes the ice unsafe to skate on.” He explained high humidity levels cause condensation build-up…