Query Wall

The Query Wall command is used to view and modify the settings on the individual edges of the room.

To view and modify the settings of a wall, go to

DM HVAC->Building Definition->Walls->Query Wall

You will be prompted select the wall to be queried.

Select wall to query:

Select the specific edge of the room you want to query. Each edge has separate settings. After selecting the wall, the Specific Wall Information dialog box will appear.

Building Definition--Walls.Specific Wall Information dialog box

No Heat Transfer: Select this option to indicate the wall will not transfer heat. It represents an interior partition. The wall will be displayed as a thin line on the drawing.

Height Transfer but no Solar Gain (Partition): Select this option to indicate there will be a heat transfer on the wall but there will not be a solar gain. It represents a partition between the conditioned space and an unconditioned space. The wall will be displayed as a thick line on the drawing.

Heat Transfer and Solar Gain (Wall): Select this option to indicate there will be a heat transfer and solar gain on the wall. It represents an exterior wall. The wall will be displayed as a thick line on the drawing.

Exposed Floor Slab: Whether or not the wall includes a slab load. Check this box for walls on the ground floor. The heat loss through the perimeter is set in the Floor Heat Loss Coefficient field in the Project Info command. This field is disabled if Height Transfer but no Solar Gain is selected.

Shading Percentage: The percentage of the wall that is shaded. The solar gain on shaded walls is calculated as if they are north facing walls. The percentage is applied to the area of wall, glass, and door on the wall. The percentage is fixed and does not change during the day. Use this setting to model trees or other buildings that shade the wall. This field is disabled if Height Transfer but no Solar Gain is selected.

Wall

Wall Type: The wall type taken from the wall project schedule. See the Wall Project Schedule section for more information.

Wall Height = Floor-to-Floor Height: Whether or not the wall height is set to the Floor-to-Floor Height value for the floor the room is in. See the Floor List section for more information on setting the Floor-to-Floor Height value.

Wall Height: The height of the wall. This field is disabled if the Wall Height = Floor-to-Floor Height checkbox is checked.

Lower Wall Type: Whether or not the wall has a second wall type. Check this box to include a second wall type. The wall type is taken from the wall project schedule. See the Wall Project Schedule section for more information.

Lower Wall Height: The height of the lower wall type. This field is disabled if the Lower Wall Type checkbox is not checked.

Door

Door Type: The door type taken from the door project schedule. See the Door Project Schedule section for more information.

Percentage: Select this option to set the door area to be based upon a percentage of the total wall area.

Area: Select this option to set the door area to a specific value.

Complex: Select this option to set the door area to be based on the size and number of doors in the wall.

Quantity: The number of doors in the wall.

Width: The width of the doors.

Height: The height of the doors.

Partition Temperatures

The Partition Temperatures settings are disabled if Heat Transfer and Solar Gain is selected.

Use OSA Temperatures for Other Side: What temperatures are used for air on the other side of the partition.

If this box is checked, the temperatures are based upon the outside air temperatures set in the Project Information dialog box. The high temperature used for the cooling load will change during the day.

If this box is not checked, the temperatures are input directly in the Other Side High Temperature and Other Side Low Temperature fields. The high temperature does not change during the day.

Other Side High Temperature: The high temperature on the other side of the partition used during cooling load calculations if the Use OSA Temperatures for Other Side box is not checked. This high temperature does not change during the day.

Other Side Low Temperature: The low temperature on the other side of the partition used during heating load calculations if the Use OSA Temperatures for Other Side box is not checked.

Glass

Walls can have multiple glass types included in them. The Glass section works a little differently from other sections in the software.

The number in the top-right of the section is the Glass ID. It is automatically assigned in increasing numerical order. Each glass type in the wall is assigned a separate number.

<-- Button: Press this button to move to the previous Glass ID. This button is disabled if Glass ID 1 is currently displayed.

--> Button: Press this button to move to the next Glass ID. If the next Glass ID has not already been defined, it will be automatically created.

Glass Type: The glass type taken from the door project schedule. See the Glass Project Schedule section for more information.

Remove this glass from wall: Check this box to delete the Glass ID from the wall. When you move to another Glass ID using the <-- or --> buttons, the glass type will be removed from the database.

Subtract Area from Upper Wall Type: Whether the glass are is subtracted from the upper or lower wall area. If this box is checked, the glass area is subtracted from the upper wall type area. If this box is not checked, the glass area is subtracted from the lower wall type area. This box is disabled if the Lower Wall Type checkbox is not checked.

Percentage: Select this option to set the glass area to be based upon a percentage of the total wall area.

Area: Select this option to set the glass area to a specific value.

Complex: Select this option to set the glass area to be based on the size and number of windows in the wall. It also allows you to set overhangs and fins for the glass that will be used for shading. The shading from these items will vary as the sun changed position during the day.

An overhang is a horizontal surface above the window that provides shade. It is assumed to be as wide as the glass.

A fin is a vertical surface to the side of the window that provides shade. Left and right is based upon facing the wall from outside the building. They are assumed to be as tall as the glass.

Quantity: The number of pieces of glass on the wall.

Width (ft-in): The width of the pieces of glass.

Height (ft-in): The height of the pieces of glass.

Overhang Extension from Wall (ft-in): The distance the overhang extends from the wall.

Overhang Height Above Glass (ft-in): The distance from the top of the glass to the overhang.

Left Fin Extension from Wall (ft-in): The distance the left fin extends from the wall.

Left Fin Distance from Glass (ft-in): The distance from the left edge of the window to the left fin.

Right Fin Extension from Wall (ft-in): The distance the right fin extends from the wall.

Right Fin Distance from Glass (ft-in): The distance from the right edge of the window to the right fin.


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