Green Breeze HAF Fans hurricane exhaust fans The injection range for the The injection range for the Dosatron Water Powered Doser 14 GPM 3 4" is 1:100 to 1:10 (1 to 10%) the ARS 1 will send those same signals to the indoor mini split head unit changing the setpoint to the desired Day or Night temperature setting automatically base on the photocell sensor status J&D's Green Breeze assists in reducing winter heating costs by efficiently moving air throughout the greenhouse creating a more uniform temperature and then for overall improved plant health and to harden plants These fans are used to achieve circulatory horizontal air flow (HAF) in a greenhouse