Thanks for the input dave67fd & phbsales. Good point on the fittings...is there a rule of thumb as to how much a 90 degree fitting adds to the total feet of pipe in the diameter calculation tables?
Hi - Diagram attached. The dashed line represents adding a run to a heater in my attached garage. I've checked out a number of calculator links in this forum, but can't seem to figure out if adding a 70' run of 3/4 inch line will adequately supply the garage heater along with the other...