Duct Layout Hvac Duct Design Example

The horizontal lines are for volume flow rate.

Duct layout hvac duct design example. Number one is the heating and cooling load calculation using a protocol like acca s manual j or the ashrae handbook of fundamentals. 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. The downward diagonal lines are for velocity the upward diagonal lines are for duct diameter. Includes a full worked example as well as usin.

Duct sizing calculations include constant pressure drop constant velocity and static regain. Duct sizing for the two examples would certainly be very different. Adapt the design to the type of unit. Ensure proper ductwork sealing.

10 psig 14 7 psi 24 7 psia. For example if the gauge reads 10 psig then using the above equation the absolute pressure would be 24. Microsoft word understanding basic residential ductwork design doc. Flexible duct work must be stretched tightly for maximum air flow.

Above and below are examples of simple hvac duct systems. Choose the right duct size and layout. You ve got to know how much heating and cooling you need for each room in btu hr. 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. How to design a duct system. Designing a duct system is important but there are a few critical steps that come first. 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.

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. Drafting features include single line and double line 2d ductwork with automatic fittings and 3d ductwork. System is designed to move 3 ton of a c or 1200 cfm. Design master hvac is an integrated hvac building design and drafting program that runs on top of autocad.

Ordinary heating ventilating and air conditioning duct systems read air pressures at 0 4 psi or less often much less. To account for all the necessary factors many professionals use a tool called acca manual d. In this video we ll be learning how to size and design a ductwork for efficiency. 1 psi equals 27 7 inches of water gauge.