HP Tower Uninterruptible Power System - Manual (Page 67)

Warranty information 67
Recommended duration of use
Although tests and a multitude of customer experiences have shown no noticeable performance issues
with UPSs for significant time periods after expiration of the 3-year limited warranty, we strongly
recommend considering replacing UPSs after a maximum of 5 to 6 years of use to assure full functionality
and a safe operating environment. This recommendation does not extend or in any way alter the warranty
for UPSs which is limited to a time period of 3 years and a coverage as stated in the applicable warranty
statement.