Hi Alyssa, The 2 Year Promise is, in fact, a warranty. Similar to those on tires or a car battery, it is prorated as time goes on. However, because ours comes with a 1-year 100% warranty period instead of a sliding scale that starts on day 1, and because we feel the term "warranty" can be misleading on the front-end, we refer to it as a promise. Details are here: http://www.blastzone.com/2-yr-home-promise Sincerely, Blast Zone Support