diff --git a/terraform_shelly/variables.tf b/terraform_shelly/variables.tf
index 04a44a4..d0fdaad 100644
--- a/terraform_shelly/variables.tf
+++ b/terraform_shelly/variables.tf
@@ -17,7 +17,7 @@ variable "sensor_innen_mac" {
 variable "taupunktschwelle" {
   type        = number
   description = "Dew point difference threshold [°C] to trigger the fan (indoor_dp > outdoor_dp + threshold)"
-  default     = 4
+  default     = 2
 }
 
 variable "mindesttemperatur" {