Capture efficiency is the ability of the kitchen ventilation system to provide sufficient capture and containment at a minimum exhaust flow rate. If the ventilation system is not providing sufficient capture and containment, convective and latent heat are spilling into the kitchen thereby increasing both humidity and temperature.
The high efficiency Capture Jet technology was designed by Halton and tested using the Tracer Gas technique in the 80’s to prevent spillage at low exhaust rates. More sophisticated testing using Schlieren thermal imaging, ASTM F 1704 test and Computuer Modeling (CFD) have been utilized to verify Capture Jet performance. The Capture Jet works by delivering a small quantity of air at a high velocity across the inside face of the canopy directed towards the grease extractors at the back of the hood. This creates a negative pressure along the front edge and sides of the canopy and assists in capture and containment of heat and effluent in critical area where people are working.