Many existing duct systems are blessed with big opportunities for improvement. Learn to perform duct triage and get results with minimal time and expense. Get field practical answers to these questions: 
          The temperature rise is too high - is it the ducts?
          How do I tell if the problem is in the supply or return?
          How can I tell if the furnace is going to cycle on the limit switch if the ducts are sealed?
          An eighty thousand BTU input furnace has six, 6" supplies – is that enough?

1. Be able to recognize duct system flaws that decrease homeowner comfort and increase
    equipment performance and durability problems
2. Find out how to quickly determine if a return duct is undersized
3. Learn to use inexpensive tools to quickly evaluate duct performance