diff --git a/_data/rack_3.yaml b/_data/rack_3.yaml
index 9fab2a9..d65a56b 100644
--- a/_data/rack_3.yaml
+++ b/_data/rack_3.yaml
@@ -10,7 +10,7 @@ substitutions:
   duct_fan_pwmfreq: 5000Hz
   duct_fan_off_spd: "0.0"
   duct_fan_lo_spd: "1.0"
-  duct_fan_init_spd: "60.0"
+  duct_fan_init_spd: "40.0"
   duct_fan_amppwr_on_lo_spd: "20.0"
   duct_fan_hi_spd: "100.0"
   amppwr_pin: GPIO19