I sourced all standard fittings from Air Handling ? There are others but these guys had an organized website, decent prices and were responsive to emails and phone calls.? I sourced spiral pipe and custom fittings from a local hvac shop.? Nordfab, thru marketing, has made their name synonymous with clamp pipe systems and so gets a premium price for standard materials.? It's nice looking stuff but there are other sources.?
Jonathan Smith