Envelope Summary Report

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The Envelope Summary Report contains four main sections:

Graph of Window-Wall Ratio per facade + supporting table
Opaque Exterior
Fenestration
Subsurface

Graph of Window-Wall Ratio per facade + supporting table

The column chart t displays the window to wall ratio for each orientation, and also identifies the ASHRAE 90.1 maximum allowable window to wall ratio before trade-offs have to be factored into the analysis. Next is a table that displays the energy model characteristics for:

Gross Wall Area
Window Opening Area
Window-Wall Ratio (same as displayed in the graph)
Gross Roof Area
Skylight Area
Skylight-Roof Ratio

Quick Review Questions to Consider:

Are any of the facade orientations above the ASHRAE 90.1 target?
Do the gross wall areas and window wall areas seem to make sense for each orientation?
Was the intention to include skylights?

Opaque Exterior

A table that includes a row for each unique surface that is associated with a thermal zone that is included in the simulation.

Construction

Identifies the library entry source for the construction input values associated with each surface of a thermal zone. The source and application hierarchy are as follows:

Libraries: Materials
Libraries: Mat'l/Glazing Layers
Libraries: Mat'l/Glazing Layer Sets
Template: Constructions
Application: Buildings > Create/Edit Building > Building > Building Constructions Field

Exterior Reflectance

The exterior reflectance for the surface material in the energy model that is defined in the Library Entry in Libraries > Materials.

Gross Area

The overall area for the thermal zone surface within the energy model

U-Factor with Film

The U-Factor for the Construction assembly that is associated with the thermal zone surface that also includes the film contributions of the exterior and interior surfaces.

U-Factor no Film

The U-Factor for the Construction assembly that is associated with the thermal zone surface that does NOT include the film contributions of the exterior and interior surfaces.

Azimuth

the orientation of that surface and corresponds to the cardinal direction but is more detailed (cardinal direction only has four directions)

Tilt

Expresses if the surface is vertical (90 deg), horizontal (180 deg) or other.

Cardinal Direction

Provides feedback on the orientation of the different surfaces.

Quick Review Questions to Consider:

Does the Opaque Exterior surfaces have the right Construction Template associated with them?
Do all the walls have a Tilt of 90 degrees?
Do the U-Factors for the constructions seem correct?

Fenestration

Fenestration Surfaces

A table that includes a row for each unique surface that is associated with a thermal zone that is included in the simulation.

Thermal Zone Surface

The first column in the table identifies each unique window type on an exterior or interior thermal zone surface.

Construction

Identifies the library entry source for the construction input values associated with each surface of a thermal zone. The source and application hierarchy are as follows:

Libraries: Materials
Libraries: Mat'l/Glazing Layers
Libraries: Mat'l/Glazing Layer Sets
Template: Constructions
Application: Buildings > Create/Edit Building > Building > Building Constructions Field

Area of One Opening

The area for one opening of a window type on a thermal zone surface that contains windows.

Note: The value for this field will be the same as "Area of Openings" if the energy model windows are single strip windows for the surface.

Area of Openings

The area for all of the window openings for a thermal zone surface.

U-Factor

The value calculated for the window based on the combinations of glazing and material layers associated with the window (Libraries > Window > Typical Window > Exterior)

Solar Heat Gain Coefficient (SHGC)

The value calculated for the window based on the combinations of glazing and material layers associated with the window (Libraries > Window > Typical Window > Exterior)

Visible Transmittance

The visible transmittance of the window assembly that was input on the library entries:

Glazing = Libraries > Materials (type = Glazing Material, sub type = Glazing)
Glazing Layers = Libraries > Mat'l/Glazing Layers (type = Glazing Material Layer, sub type = default)
Glazing Layer Set = Libraries > Mat'l/Glazing Layer Sets (type = Glazing Layer Set, sub type = default)

Shade Control

Identifies if the window has an exterior shading device associated with it or not.

Parent Surface

Identifies a neighboring surface to the thermal zone surface.

Azimuth

the orientation of that surface and corresponds to the cardinal direction but is more detailed (cardinal direction only has four directions)

Cardinal Direction

Provides feedback on the orientation of the different surfaces.

Quick Review Questions to Consider:

Does the Area of Opening seem right for each surface?
Does the Overall Area of openings seem to make sense for each surface?
Are the SHGC and Visible Transmittance correct for the windows associated with the Construction Template?
Was the intention to include Shade Control?

Sunlit Fraction, Window Controls, Subsurface

do not always contain data, it depends if certain things are in your model.

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