Duct Layout Hvac Duct Design Example

Designing a duct system is important but there are a few critical steps that come first.

Duct layout hvac duct design example.

The downward diagonal lines are for velocity the upward diagonal lines are for duct diameter. The most common design trunk line layout is provided in the. The diagram above illustrates the fact that the air handler may be centrally located preferred or located elsewhere dependent upon the configuration of your home. In this video we ll be learning how to size and design a ductwork for efficiency.

One on a concrete. Once all the system variables have been decided your hvac design professional can determine the most efficient ductwork design layout and calculate the correct duct size. Sketch a rough design using a central supply duct from the unit to the opposite end of the house with branches forking to each outlet. Choose the right duct size and layout.

Design master hvac is an integrated hvac building design and drafting program that runs on top of autocad. Flexible duct work must be stretched tightly for maximum air flow. 1 psi equals 27 7 inches of water gauge. System is designed to move 3 ton of a c or 1200 cfm.

10 psig 14 7 psi 24 7 psia. Duct sizing for the two examples would certainly be very different. How to design a duct system. For example if the gauge reads 10 psig then using the above equation the absolute pressure would be 24.

The manual d is a complete schematic drawing of the duct system including locations and sizes of trunk lines branch ducts outlet registers an inlet grilles. Duct sizing calculations include constant pressure drop constant velocity and static regain. Drafting features include single line and double line 2d ductwork with automatic fittings and 3d ductwork. Includes a full worked example as well as usin.

Above and below are examples of simple hvac duct systems. Microsoft word understanding basic residential ductwork design doc. Adapt the design to the type of unit. You ve got to know how much heating and cooling you need for each room in btu hr.

The layout of the chart does vary a little depending on the manufacturer but in this example the vertical lines are for pressure drop per meter of duct. Ensure proper ductwork sealing. The horizontal lines are for volume flow rate. Ordinary heating ventilating and air conditioning duct systems read air pressures at 0 4 psi or less often much less.