Rhvac 8 by Elite Software, www.elitesoft.com, is an HVAC design program that calculates peak heating and cooling load requirements for rooms, zones, systems and entire buildings for residential and ...

Just because ducts are designed a certain way doesn’t mean they will function as intended. Quick duct design rules have been around for a long time and aren’t going anywhere in the near future.

In 1948, research by R.G. Huebscher established flow resistance for different shapes of ductwork at equal velocities, which allowed the creation of the duct-sizing calculator or “Ductulator” for ...