The total static pressure a supply fan must overcome typically includes the sum of which categories on the “longest/ index” run?
Choices
- (A) Only equipment ESP at AHU, zero duct
- (B) Duct + fittings + terminal loss + coil/filter dampers, etc. (external to fan interaction per method)
- (C) Refrigerant subcooling
- (D) Soil type
Correct answer: (B)
Duct + fittings + terminal loss + coil/filter dampers, etc. (external to fan interaction per method)
Explanation
SP fan selection = external static per SMACNA/MCA tables + safety factor.