Duct Layout Hvac Duct Design Example

For example if the gauge reads 10 psig then using the above equation the absolute pressure would be 24.

Duct layout hvac duct design example.

Getting a complete manual d hvac design done on your property plans is the best way to ensure that your heating and cooling system will deliver maximum comfort at high efficiency a proper hvac duct sizing will guarantee that your. One on a concrete. Choose the right duct size and layout. 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. 10 psig 14 7 psi 24 7 psia. Drafting features include single line and double line 2d ductwork with automatic fittings and 3d ductwork. Designing a duct system is important but there are a few critical steps that come first.

Number one is the heating and cooling load calculation using a protocol like acca s manual j or the ashrae handbook of fundamentals. The most common design trunk line layout is provided in the. Adapt the design to the type of unit. Design master hvac is an integrated hvac building design and drafting program that runs on top of autocad.

Duct sizing for the two examples would certainly be very different. 1 psi equals 27 7 inches of water gauge. Flexible duct work must be stretched tightly for maximum air flow. Duct sizing calculations include constant pressure drop constant velocity and static regain.

You ve got to know how much heating and cooling you need for each room in btu hr. In this video we ll be learning how to size and design a ductwork for efficiency. To account for all the necessary factors many professionals use a tool called acca manual d. 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.

Above and below are examples of simple hvac duct systems. How to design a duct system. System is designed to move 3 ton of a c or 1200 cfm. Ordinary heating ventilating and air conditioning duct systems read air pressures at 0 4 psi or less often much less.

The horizontal lines are for volume flow rate. Ensure proper ductwork sealing. The downward diagonal lines are for velocity the upward diagonal lines are for duct diameter. Microsoft word understanding basic residential ductwork design doc.