Holds a diamondAge hot end to a rostock effector with a fan to cool all the stuff that needs to be cooled.
Chimney.stl lightweight, don't do this one unless all your settings are spot on and you need minimal head mass.
ChimneyRobust.stl This is a bit more forgiving, stronger. all the walls are thicker but the working clearances are the same.
LEDigloo.stl print this one, after all, it's nice to see the printer working. Get 3 x white 30degree spread angle LEDs and a 470 ohm resistor to power them off 12 volts.
Igloo.stl is an annular ring to fit under the effector and direct the air over the near print space. There's a small hole designed into the side to bring out your head and sensor wires.
When the hot end is switched off, air rises via convection through the effector, the housing and out the fan openings.
Note:LEDigloo2.stl has double wall thickness for the LED entrapments. the first version I released worked, but was fragile.

If you were one of the first 40 or so people to download the chimney, you'll have a dead zone on one corner of your rostock build plate. The corrected version has a mounting foot centered straight under the middle of the lowest side of the fan mount.