Larry Gardner is an experienced installer and contractor for residential HVAC work. In his book, Tips for Residential HVAC Installation, he shares tips he has learned over the years on how to do the job faster, better, and smarter. For more information, visit www.lamabooks.com.
Field modifying fittings and duct can save time and money. If you install residential ductwork on a performance basis (X number of dollars for the job) as I do, it is sometimes a real benefit. You have to know how fittings are made before you can alter them.