THEORY OF OPERATION LBB Series Oven Owner’s Manual20 Version 20ExhaustHeaterRecirculation Fan3. Theory of Operation3.1. The LBB Series OvenThe Despatch LBB Series ovens (Figure 2) effectively distribute heat with a processing timeamong the fastest of any lab oven in its class. LBB Series ovens are effectively used in testing,preheating, sterilizing, drying, aging and curing as well as other production applications. TheLBB Series ovens incorporate forced circulating airflow with precise digital control to deliver fastprocessing. The overall result is efficient productivity under strenuousconditions.The LBB Series ovens are precise and practical. The unique Despatchdesign moves convected heat through stainless steel ducts on each sideof the oven (Figure 3). The air is circulated with a high volume fan.The LBB Series ovens employ higher volume fans than anycompetitive model. The chamber can be densely loaded withoutinterfering with the process. For your convenience the fresh air intakeis fixed. The exhaust rate is regulated by a damper on the back of theunit.Figure 2. LBB Forced ConvectionBenchtop Oven.Figure 3. Uniflow Airflow through theLBB Oven.