Duct Sizing and Layout

FAQ–Duct Sizing and Layout

Frequently asked questions about using the duct design modules in the Right-Suite™ Universal program for duct sizing and layouts.

Q. How do I do an automatic duct layout?

A. If you own the Right-D module of Right-Suite Residential, Right-Draw will add supply and return air outlets as you add rooms. To automatically generate a duct layout, move the unit and air outlets to appropriate locations and choose the duct layout. To choose the duct layout, select the unit and right click. Choose the duct layout and close the Property Sheet for the unit. Right-Draw draws the duct design for you and calculates the duct sizes.

Q. How do I modify an automatic duct layout?

A. Once a duct layout has been generated, you can modify it by adding registers, trunks, etc. First you must change the duct layout to User defined. To do this, 1) select the unit and right click to view the Property Sheet. 2) Change the duct layout to 'User defined'. This will allow you to make modifications.

Add air outlets: To add supply or return registers, 1) select supply or return registers from the HVAC Shapes Toolbox. 2) Click where you want the new register. If you do this before you choose the duct layout, the air outlet will automatically be included in the duct layout. If you have chosen the duct layout and are now modifying the layout, you can either connect the air outlet manually or select the duct layout again in the Property Sheet for the unit and the duct layout will be regenerated with the new register added. It is recommended that you add and delete all registers before you draw the duct system layout.

Delete air outlets and ducts: To delete an air outlet or duct (make sure the duct layout is user defined), 1) select the air outlet or duct you want to delete. 2) Press the delete key to delete the air outlet or duct. The loads and duct calculations will be adjusted automatically.

Add a new duct: To add a new duct, 1) select supply or return ducts from the HVAC Shapes Toolbox. 2) Draw the duct by connecting the snap points (blue boxes that surround the unit and are located in the center of the air outlets) on the unit and air outlet. Resize a duct: 1) select the duct you want to resize. 2) Drag one of the green or red handles on the duct to the new point.

Q. How do I do a manual duct layout?

A. If you own the Right-D module of Right-Suite Residential, Right-Draw will add supply and return registers as you add rooms. You can add, delete, and move registers and ducts to layout the ducts manually. First, make sure the duct system type is set to 'User defined' (right click on the unit and choose 'User defined' for the duct layout). Now all you have to do is use the supply and return duct shapes in the HVAC Shapes Toolbox to draw the duct system. Make sure the snap points are on ('Snap On' in the grid settings and that the Toggle snap points button is such that the snap points are visible).

Q. How do I add more supply registers or return grilles to the duct system?

A. In the menu, if Drawing | Duct System is set to either Plenum or Radial, just drag either a supply register or return grill from the HVAC Shapes toolbar into the room where you want it. Right Draw will automatically connect the new register or grille to the duct system, and adjust the duct sizes automatically. If Drawing | Duct System is set to User Defined

Q. When I design a duct system using Right-Draw, is Right-D, Right-CommDuct, or Right-Ducts disabled?

A. No, not at all. The Right-D, Right-CommDuct, and Right-Ducts Static Pressure and Duct Preferences Screens are still fully functional. But Right-Draw is entering new ducts and registers into the Supply Branch and Trunks and Return Branch Screens, so you should just ignore them unless you want to disable Right-D, Right-CommDuct, or Right-Ducts's automatic duct design features.