He typed furiously, checking the . The software calculated the ratio of width to height. 22x12 was a ratio of 1.8:1. Good. Efficient. But the narrow 18x12 section was 1.5:1. Actually, that was better. A square duct was the most efficient shape.
This is the most common approach for commercial supply and return systems. You select a constant friction loss (usually 0.1 inches of water column per 100 feet) for the entire system. Easy to calculate; ensures consistent pressure drop.
Today, the McQuay Duct Sizer is often used to cross-check automated designs from Revit or Wrightsoft. It is particularly useful for:
He hit .
Speed of air. High velocity saves space but increases noise and pressure drop.
He clicked the button. This was the magic of the McQuay tool. It allowed him to translate rectangular geometry into round, and back again.
He typed furiously, checking the . The software calculated the ratio of width to height. 22x12 was a ratio of 1.8:1. Good. Efficient. But the narrow 18x12 section was 1.5:1. Actually, that was better. A square duct was the most efficient shape.
This is the most common approach for commercial supply and return systems. You select a constant friction loss (usually 0.1 inches of water column per 100 feet) for the entire system. Easy to calculate; ensures consistent pressure drop.
Today, the McQuay Duct Sizer is often used to cross-check automated designs from Revit or Wrightsoft. It is particularly useful for:
He hit .
Speed of air. High velocity saves space but increases noise and pressure drop.
He clicked the button. This was the magic of the McQuay tool. It allowed him to translate rectangular geometry into round, and back again.