VENTCAL

Environmental and scientific testing and monitoring equipment, namely, air ventilation rate monitor and computer software for use in measuring carbon dioxide and temperature, monitoring, calculating, documenting, diagnosing outdoor air ventilation rates; environmental monitors, ventilation monitors, air ventilation monitors, temperature monitors, carbon dioxide monitors, hand-held monitors; environmental probes, ventilation probes, air ventilation probes, outdoor air ventilation probes, temperature probes; environmental sensors, temperature sensors, ventilation sensors, air ventilation sensors, outdoor air ventilation sensors; data acquisition systems consisting of recorders, dataloggers, computer terminals, digital input/output interfaces, computer printers; microprocessor operated data processors