The PACK Series provides an economical solution for heating requirements with airflow rates from 1,200  to 18,000 CFM (566 to 8,496 L/s).  The gas input capacities range from 150 to 400 MBH (44 to 117 kW) per furnace.  The heat exchangers are of induced draft type with stainless steel tubular design and offer a 2.5 to 1 turndown.  One to six furnaces can be utilized in series/parallel arrangements to obtain the heating capacity required.