This is a replacement for the effector that works with an E3D Aero. It includes a fan mount/duct, but it only works with E3D volcano, which is 8mm taller than the normal heater block.
After installing it you need to change the delta radius in the config file from 211.75 to 203.58
M665 R211.75 L361.19 B140 H434.44 X-0.0 Y-0.0 Z0.00 ;original line
M665 R203.58 L361.19 B140 H477.8 X-0.0 Y-0.0 Z0.00 ; new line
Print the effector upside down. Print the fan on it's back side. The fan requires a 2cm bridge, so make sure your fan settings during bridging are good.