Sears offers Carrier and Kenmore. Kenmore is Tempstar(they suck). We are an installation contractor for them. Alot has changed as far as contractors are concerned, they have in the past hired tail gate contractors that didn't get paid squat. That might still be the case however, I dictated our remittance for work and the gaurantee is pretty good. Their salesmen are very weak in knowledge as we usually find scores of issues on measure up. We had to cancel a gas w/ a-c complete cut because the home had no gas and would have been a 6-8000$ main line extension. As with all contracted jobs you should get more than 1 quote.