I have two new air conditions installed on my modules This one is a small air condition for a mobile home - in an adventurous installation on a palette pile: This is a really big air condition - a lot of cold air is needed for this italian restaurant, because it gets hot when you're baking pizzas the whole day: They can be found here: http://3ddecodetails.com/airconditions/index.html
I made a tutorial video of how to handle a freshly 3D-printed air condition: smoothing the surface, applying primer, airbrushing, weathering, installing on top of the roof of a model structure: https://www.youtube.com/watch?v=-82Og9CvX7w