Continued from page 1
Halon is an odorless, colorless gas that extinguishes fire by tweaking
combustion process. It was embraced by places such as data centers, libraries, and art museums because it didn’t leave any residue. But in
late 1990s, Halon was found to be environmentally damaging, as well as potentially harmful to anyone doused by it?not a good situation for IT employees who might be in
data center when a fire breaks out in
building.
Although Halon was banned for new construction, it wasn’t outlawed, and refill tanks are still available for
systems that are still in place. That means if a data center manager is looking to colocate, and
facility in question was built before
mid-’90s, it’s possible that a Halon system is in place. Besides environmental and health concerns, it’s worth thinking about stripping
system or looking for another facility, Sacco notes, because Halon is frequently considered a poor alternative to a water-based system. For Halon to work,
room has to be airtight because
gas is heavier than air. That means any raised flooring or open vents could render
system less effective.
Data Center Makeovers For companies that aren’t building a new data center but want to spiff up their existing facility, fire protection issues get more complicated. The replacement of one system with another isn’t just a discussion for
architect and
IT department head; rather,
local fire authorities also have to be involved. Sometimes a municipality won’t allow a nonsprinkler system to be put in place, no matter how effective it might have proven to be in other facilities.
“Unfortunately, systems have to conform to rules set up by
municipality where
data center is located,” says Sacco. “The fire inspector could approve a chemical-based system in new construction but not approve
capping of a wet sprinkler system in a remodel. That’s pretty common.”
In that case Sacco notes that data center managers should work with
architects to develop a preaction system, which holds water in check until it’s absolutely necessary. Such a system will fill
pipes with water but won’t release it until there’s a significant amount of heat in
room.
In general Sacco recommends that every data center, whether new or old, should have a multilayered system in place for fire protection. That includes having
latest fire suppression system but also doing periodic testing, assigning responsibility for system upkeep, and integrating
fire protection with other temperature controls.

None