![]() These products violate minimum fire code requirements. UL’s blatant denials and deception do not make the Data Bus Danger disappear. The Data Bus Danger is a simple problem on the Data Bus, such as a short- circuit caused by fire, that instantly causes the entire fire alarm system to catastrophically fail and provide no warning to the occupants or the central monitoring station of a fire - people die and buildings burn. This dangerous situation gets even worse when UL pretends that the plain language of the standards does not apply to the Data Bus Danger as Underwriters Laboratories recently claimed in a 78-word statement defending their “confidential” investigations. ![]() The occupants of tens of thousands of commercial properties, hospitals, apartments and schools are hostage to deceptively "listed" protection. The videos makes it clear that UL recklessly “listed” Vista panels which they knew, or should have known, did not meet the plain language of the UL and NFPA standards. When UL testing proves these products meet the standards, they are “listed” by Underwriters Laboratories. NFPA 72 (2016 edition) - 12.6.5 Monitoring for integrity shall not be required for connections to and between supplementary system components, provided that a single open, ground-fault, or short-circuit conditions of the supplementary equipment or interconnecting means, or both, do not affect the required operation of the fire alarm or signaling system.įire alarm manufacturers like Honeywell pay UL huge sums of money to professionally test their alarms.The danger was understood by the Standards Committees composed of industry experts who together developed the UL and NFPA standards that forbid the Data Bus Danger in plain language. This means that a VISTA-128FBP that is installed only as a fire alarm is just as dangerous and non-compliant as a Vista installed as a combination fire/burglar alarm - the Data Bus Danger is just as deadly. The section below of NFPA 72 is one of many that focuses on the fire system. The videos clearly demonstrate that a short circuit on the ECP1 Data Bus causes instant failure of the alarm panel with no on-site warning and no alarm signals sent to the central station. Six Minute Burn Demonstration Video: Vista Fire Alarm Burn Video Demo Technical In-Depth Videos 1 and 2ĭata Bus Danger: Video 1 - Description and Standards: Video 1 Linkĭata Bus Danger: Video 2 - Failure Demonstrations: Video 2 Link ![]() For a quick overview, take six minutes for the short burn demonstration. threatens the lives of millions of property owners and leaves insurers with huge financial risks for loss of life and property. While prohibited by both UL and NFPA standards, the Data Bus Danger identified by Jeffrey Zwirn of IDS Research and Development, Inc. The UL listed Ademco Vista Series VISTA-128FBP / VISTA-250FBP commercial fire alarm panels sold by Honeywell are the most popular commercial fire alarms in the USA, protecting apartment buildings, hotels, hospitals, nursing homes, schools and businesses.
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