I've had good luck with Greenwood Heating over the last five years--they have very knowledgeable repair people. My only advice is, don't let them sell you anything newfangled. They put in a crazy Lennox CompleteHeat system when we remodeled five years ago, and they have spent a lot of time out here since (on their dime). I've been impressed with how well they've backed up the Lennox warranty and their own guarantees, though. They also installed a new furnace in a rental for me last fall, and did a great job.
more