The Utility Series 2 is a step larger than our Utility Series 1 This machine features a 10" hearth up from the 8" on the Utility Series 1. Standard features on the Utility Series II are the integrated wheeled dolly for easy mobility. The filter consist of 4 inch centrifugal filter and 6 tube cooling rack, and final filter. The blower system operated in two modes a vacuum mode to light the machine and then a positive mode for flaring and also cooking. The blower has a speed control so you have full control of metering the gas output.