Champion AC installed a combined two-story SEER-18 heating and cooling system for us in November of 2008 as part of an integrated effort to convert our home to net zero electrical energy. We estimate the new system has reduced our AC electrical consumption by nearly 29, and has contributed to a HERS rating of 71 for our home. The work was done on time, on budget, at an affordable price, and has been consistently backed by responsive, professional service since. We'd recommend Champion AC for any heating or cooling work.