Fires started in cooking equipment of commercial
eating establishments cause millions of pounds in damage each year.
Kitchen exhaust systems are designed to pull
smoke, grease vapours and cooking residues out of the kitchen area. The filters
can never eliminate all of the vaporised grease which, together with debris,
condenses onto the inside of the ducts and the fan surfaces. Over a short
period of time, enough grease will accumulate to create a very serious fire
When fire takes hold in the exhaust system above the
cooking equipment, the grease in the ducts acts as a fuse allowing the fire to
spread rapidly through the ducts to other areas of the building. The fire
can break out of the ducts at any penetration, hole or joint, or following
heat-induced collapse of the ductwork due to the extreme heat produced where
temperatures can reach 1200degC.
When a duct
system is cleaned regularly the chance of a duct fire is dramatically reduced.
In the , the National Fire Protection
Association (NFPA) has set the Standard (NFPA #96) governing inspection and
maintenance of commercial kitchen exhaust systems.
NFPA #96 Section 8-3.1 (1998 ed.) states in part:
“Hoods, grease removal devices, fans, ducts
and other appurtenances shall be cleaned to bare metal at frequent intervals
prior to surfaces becoming heavily contaminated with grease or oily sludge.”
EPS Envirotech Ltd providing high quality, tailored
solutions for hygiene in the indoor environment.
exhaust duct-cleaning project begins with the initial inspection. As with AC
ducts the process is quicker if original duct schematics are available, if not
then part of the site survey will include compiling drawings of the systems. Also
during the survey we identify access panels and advise if further panels will
be required in order to carry out thorough cleaning. Photographs are taken and
deposit thickness levels recorded.
areas of the ductwork that are physically accessible are cleaned to bare metal
using a specially formulated cleaning agent; this also includes the cooker hood
plenum and fans. Vertical ducts are cleaned, either using high pressure steam
by a technician descending the duct on a winch operated access chair.
Additional access panels are installed as required, and any still inaccessible
areas are documented giving specific details of the location and access
difficulties, together with recommended solutions.
of each project we provide a certificate of cleaning and a photographic project
report, detailing the cleaning operation.
All projects are carried out in accordance with the
standards laid down in NFPA#96
EPS Envirotech Ltd provides the most professional,
comprehensive exhaust duct cleaning and inspection service available.