Scientific Dust Collectors' Supersonic Pulse Jet Railing Top (SPJ-RT) Collector is designed for easy top bag removal from the clean side while maintaining low headroom. It utilizes the patented supersonic nozzle cleaning system as well as a high-side inlet so that the heavier dust falls out of the air stream. These features allow the collector to operate at higher air-to-cloth ratios, lower pressure drops, and provide longer filter life. This design has all the same benefits and features as our walk-in plenum design. The only difference is that the bags are accessed through "lift-off" doors on the roof of the baghouse. The Railing Top design allows bag access where outside temperature is hot enough to prohibit entry into a walk-in plenum.