From the MAKE Flickr pool
Markayak took the matter of cenral air into his own hands -
DIY Central Air: Cold air output of the 2-ton wall unit is piped via duct tape and poly dropcloth to the nearest heat register. Furnace filter was replaced with a plywood panel (not pictured) to prevent backflow. Heating ductwork was used to distribute cool air to the bedrooms.
Aah comfort – the great motivator! – Link
Homemade air conditioner – Link