Abstract: An inertion funnel includes a hollow ring with an attachment point on an outside edge and a plurality of output apertures on the inside edge allows for an even flow of gas around the circumference of the ring and through the output apertures into a filter funnel below. The attachment point allows the attachment of a hose or other fitting through which gas flows into the hollow ring, which rests above and around the opening of the filter funnel. On the inside of the ring, an angled downward opening allows gas to flow out of the ring and into the filter funnel. Uniformly distributed around the opening are vanes that direct the flow of gas from the ring into the filter funnel below.