The 1960s was a truly memorable decade. The Civil Rights Act was signed into law by LBJ. The British band invasion was occurring, and hippies gravitated to places like the Haight-Ashbury area of San Francisco. The decade was marred by three tragic assassinations so while it wasn’t ideal, no one will argue its uniqueness. The 1960s included two notable sporting predictions. Joe Namath predicted a Jet’s victory over the heavily favored Baltimore Colts in the 1969 Super Bowl. Five years earlier, brash young boxer Cassius Clay (who later changed his name to Muhammed Ali) predicted his first-round knockout of Sonny Liston. Namath and Ali remind us that when a guarantee is made, there must be some assurance that it will be backed up. The same is true with guarantees made by HVAC companies you have hired to install a new furnace and air conditioner in your home. There will not be millions of people watching as you sign the contract, so it is up to you to make sure of what the warranty covers. Look for favorable terms, preferably longer. No warranty will apply to a 25-year-old unit, but the manufacturer’s warranty should cover at least the first few years. If you opt for an extended HVAC warranty, then be sure that the HVAC provider is a stable company that won’t disappear in six months. Review any installation warranty carefully. It should include a 100% money-back guarantee if the HVAC systems malfunctions due to a faulty installation. Most important is to know what could void the warranty. If you attempt a minor repair instead of getting a professional HVAC tech to make the fix, then you could end up being floored like Sonny Liston with a repair bill that you thought was covered.