Most homes in our neck of the woods rely on forced-air furnaces for heat during the winter. They heat the air inside their system, then blow it to the corners of your home through a system of ducts hidden in your attic and the crawlspaces of your walls. It’s inexpensive and works very well. We still have a few more weeks of winter left, but spring tends to come early in Austin, and before long you’ll be turning off your furnace and turning on your air conditioner for the summer. That makes this the perfect time of year to perform some checks and maintenance on your furnace in preparation for the coming spring.