Got Sweaty windows? Moldy walls? Unpleasant musty odor? Give your house some breathing room by properly exhausting it to the exterior by means of an automatic exhaust fan. Plastic or metal pipe should attach to the exhaust port and terminate at a jack located on the roof or an exterior wall -- NEVER into an attic or crawlspace, unless you want to end up with a slimy mess. And that's the On The House tip for today.