Patent ID: 9707821
Date: 2017-07-18
CPC Classifications: B60H

Claim:
1. A power machine comprising: a frame; an operator enclosure supported on the frame; a heating, ventilating, and air conditioning (HVAC) system positioned in an HVAC housing supported on the frame and having a primary fan, the HVAC system configured to treat air; a first ductwork section, the first ductwork section arranged downstream of an HVAC housing outlet such that the first ductwork section receives treated and pressurized air from the HVAC system under power from the primary fan; a second ductwork section; an intermediate cavity defined by a structure positioned within the operator enclosure, the intermediate cavity being positioned between the first ductwork section and the second ductwork section such that the pressurized air from the first ductwork section is moved into the intermediate cavity, the intermediate cavity having a larger cross section than both of the first ductwork section and the second ductwork section; and a secondary fan for drawing and re-pressurizing air from the intermediate cavity into the second ductwork section and forcing the re-pressurized air through the second ductwork section.