Compare Exhaust Removal Technologies
Source Capture Systems
This type of system uses a hose and nozzle, ductwork and an exhaust fan to draw the vehicle exhaust emissions out of the firehouse. The nozzle connects directly to the vehicle exhaust pipe so exhaust emissions cannot escape. When exiting, the system remains connected until it reaches the doorway, at which time the nozzle automatically releases. The source-capture hose system is specified by most fire departments because it is the only system that meets the NFPA 1500 Standard for "100% effective capture."
Diesel Particulate Filter
This is an underbody, canister-type filter that manufacturers install on apparatus beginning with 2007 models, as mandated by the EPA. These filters can also be purchased for older model apparatus. The filter’s primary purpose is to capture the particulate that is at its greatest concentration when a vehicle is started. The filters may also capture some gases, but underbody filtration technology is not capable of eliminating most of the toxic gases in diesel exhaust emissions.
Air Purification Systems
These systems use a series of ceiling-mounted air filtration units in the bay area to pull in exhaust fumes and other pollutants. The contaminated air passes through a series of filters to remove particulates and gases, and then disperses the purified air back into the facility. Other types of air filtration units, such as ducted and portable units, may be used in other parts of a facility, such as living quarters and offices. Air purification systems are also widely used in factories, laboratories, sports arenas, conference facilities, nursing homes, etc.
Custom Systems
This is a type of source capture system that uses a dampered nozzle to connect the hose to the vehicle exhaust pipe. The nozzle must be manually connected and disconnected. These “simple drop” systems do not use a track or rail; instead, the hose connects directly to overhead ductwork and winds up on a reel when not in use. These systems are used for non-emergency firehouse vehicles, buses, OTR trucks, and heavy equipment. They are used to capture and remove exhaust emissions anytime vehicles are operated in an enclosure such as a maintenance facility or garage.
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