SmartVentilation's Low Voltage CO2 Controller
will automatically adjust Daisy Ductless or SVI Zephyr fresh air system fan speed to maintain an indoor carbon dioxide level of close to 600 parts per million even as occupants come and go. Research conducted at Harvard TH Chan School of Public Health and Lawrence Berkeley National Laboratory, reveals that both cognitive function and sleep become surprisingly impaired as carbon dioxide rises above 600 parts per million. Read a remarkable article. Joel Jean
When used with SmartVentilation's 120 vac Plug 'n Play switching device, this controller can operate 120vac fans by switching them on and off to maintain around 600 parts per million indoor carbon dioxide levels.