|
For a home of 1450 sq ft,normally a total of 8 runs would be sufficient to serve this upper area, using 5" pipe-4x10 regs.. and approx 4 or 5 more 5" runs to the Basement area would do it. A grand total of 12 or 13, 5 " Supply runs, together with various Return air grilles in individual rooms wuold suffice nicely. Your duct work size is"way out" of line. You'll be better off to get an Pro Hvac Tech in on this and RECALCULATE the sizes properly taking into consideration as to the R value of the existing insulation, type of windows, exposure, etc, etc. . This main duct run of 37' will certainly need some size adjustments to deliver the right cfm. Proper fan air speed is necessary not only to provide the suitable CFM, but for quietness too. Good luck...Hube
|