This week’s gallery highlights these HVACR products: a digital troubleshooting tool for HVAC service techs; a commercial tankless water heater with flexible installation options; a fixtureless UV-C lamp system for high-volume HVAC environments; a line of compact energy recovery ventilators; a line of plate and frame heat exchangers with computerized product selection; security cages for mini-split outdoor condensing units; and a packaged terminal air-conditioner system designed for hotels.