• Surface emissivity — Displays the selected construction's internal surface emissivity factor. Surface emissivity is a measure of the efficiency in which a surface emits thermal energy. It is defined as the fraction of energy being emitted relative to that emitted by a thermally black surface (a black body). A black body is a material that is a perfect emitter of heat energy and has an emissivity value of 1. A material with an emissivity value of 0 would be considered a perfect thermal mirror.
• Absorption coefficient — Displays the absorption coefficient for the selected construction's internal surface. The absorption coefficient is a number between 0 and 1. The lower a construction's inside surface solar absorption coefficient, the less solar heat it transmits.
• Fix thermal properties check box (Surface emissivity, Absorption coefficient) — When on, calculated surface emissivity and absorption coefficient are overridden, enabling you to define your own thermal properties. The background color on the value fields is changed to white indicating the field is read writable, When off, the calculated transmission properties are used. All value fields are read-only.
  
  
  
• Upward-U-Value — Displays the calculated inside surface U-value or thermal transmittance of energy traveling upward through the selected construction.
• Downward-U-Value — Displays the calculated inside surface U-value or thermal transmittance of energy traveling downward through the selected construction.
• Horizontal-U-Value — Displays the calculated inside surface U-value or thermal transmittance of energy traveling horizontally through the selected construction.
• Fix thermal properties check box (Upward-U-Value, Downward-U-Value, Horizontal-U-Value) — When on, all upward, downward, and horizontal U-values calculated thermal properties are overridden, enabling you to define your own thermal properties. The background color on the value fields is changed to white indicating the field is read writable, When off, the calculated U-values are used. All value fields are read-only.
  
  
  
• Decrement factor — Displays a decrement factor which is the decreasing amplitude of the thermal wave during its propagation process from outside through the construction inside surface.
• Admittance — Displays the amount of heat that passes through a unit area of the construction inside surface, when its opposite faces are subject to a unit temperature change.
• Time lag — Displays the time taken for heat generated by the sun to transfer from the outside, through the construction inside surface, and affect the internal conditions.
• Weight — Displays the construction inside surface weight per unit area.

Tip: You can open the Results Viewer utility to step through the calculations of the selected construction’s U-Value properties by selecting the information icons next to the values.

• Surface emissivity — Displays the selected construction's external surface emissivity factor. Surface emissivity is a measure of the efficiency in which a surface emits thermal energy. It is defined as the fraction of energy being emitted relative to that emitted by a thermally black surface (a black body). A black body is a material that is a perfect emitter of heat energy and has an emissivity value of 1. A material with an emissivity value of 0 would be considered a perfect thermal mirror.
• Absorption coefficient — Displays the absorption coefficient for the selected construction's external surface. The absorption coefficient is a number between 0 and 1. The lower a construction's external surface solar absorption coefficient, the less solar heat it transmits.
• Fix thermal properties check box (Surface emissivity, Absorption coefficient) — When on, calculated surface emissivity and absorption coefficient are overridden, enabling you to define your own thermal properties. The background color on the value fields is changed to white indicating the field is read writable,When off, the calculated transmission properties are used. All value fields are read-only.
  
  
  
• Upward-U-Value — Displays the calculated outside surface U-value or thermal transmittance of energy traveling upward through the selected construction.
• Downward-U-Value — Displays the calculated outside surface U-value or thermal transmittance of energy traveling downward through the selected construction.
• Horizontal-U-Value — Displays the calculated outside surface U-value or thermal transmittance of energy traveling horizontally through the selected construction.
• Fix thermal properties check box (Upward-U-Value, Downward-U-Value, Horizontal-U-Value) — When on, all upward, downward, and horizontal U-values calculated thermal properties are overridden, enabling you to define your own thermal properties. The background color on the value fields is changed to white indicating the field is read writable,When off, the calculated U-values are used. All value fields are read-only.
  
  
  
• Decrement factor — Displays a decrement factor which is the decreasing amplitude of the thermal wave during its propagation process from outside through the construction outside surface.
• Admittance — Displays the amount of heat that passes through a unit area of the construction outside surface, when its opposite faces are subject to a unit temperature change.
• Time lag — Displays the time taken for heat generated by the sun to transfer from the outside, through the construction outside surface, and affect the internal conditions.
• Weight — Displays the construction outside surface weight per unit area.

Tip: You can open the Results Viewer utility to step through the calculations of the selected construction’s U-Value properties by selecting the information icons next to the values.

• Underfloor space height — For ground floors with an outside air space below. Displays the height above the solid ground to the underside of the exposed floor.
• Ventilation opening area — Displays the total area of ventilation openings in the selected construction.
• Insulation type — Displays the insulation type to consider for the ground floor.
• Insulation material — Used to display and select the insulation material to be considered for the ground floor. Select from the available materials in the drop-down list provided.
• Insulation thickness — Displays the insulation thickness to be considered for the ground floor.
• Insulation width — Displays the total insulation width to be considered for the ground floor.

The settings under the Below-grade walls/floors heading are enabled when the Fix thermal properties options are checked.

• Below-grade wall with an overriding C-factor — When on, enables the Overriding C-factor value field.
• Slab-on-grade floor with an overriding F-factor — When on, enables the Overriding F-factor value field.
• Overriding C-factor — Used to enter an overriding C-factor for below grade walls.
• Overriding F-factor — Used to enter an overriding F-factor for slab on grade floors.

Contains controls for defining glazing data in addition to the fabric materials that make up the window construction. The sum of the window properties and fabric data is considered in determining the thermal properties of the window.

• Glazed amount — Displays the amount of glazing the window has as a percentage or as a ratio.
• Light transmittance — Displays the amount of daylight striking the window glazing that passes through to the inside as a ratio. Glazings with a high light transmittance appear relatively clear and provide sufficient daylight and unaltered views; however, they can create glare problems. Glazings with low light transmittance are best used in highly glare-sensitive conditions, but can create gloomy interiors under some weather conditions and diminished views.
• Average solar gain factor air — Used to calculate total heat gain through the window, the Average solar gain factor air property represents the average solar gain over a 24 hour period for the air space between the inside surface of the window glass and internal shading. Solar gain factor refers to an estimate of the heat gain due to transmitted and absorbed solar energy through a benchmark glazing (1/8” or 3 mm clear glass) at a specific latitude, time and orientation.
• Cyclic solar gain factor air — Used to calculate total heat gain through the window, the Cyclic solar gain factor air property represents the hourly swing of the solar gain over a 24 hour period for the air space between the inside surface of the window glass and internal shading. Solar gain factor refers to an estimate of the heat gain due to transmitted and absorbed solar energy through a benchmark glazing (1/8” or 3 mm clear glass) at a specific latitude, time and orientation.
• Shading coefficient — Displays the Shading coefficient value associated with the window. This dimensionless indicator is the ratio of the solar heat gain of the selected glazing compared to a benchmark glazing (1/8” or 3 mm clear glass) under identical conditions. The Shading coefficient along with the Solar heat gain coefficient indicate the total solar heat gain and are used in cooling load calculations.
• Solar heat gain coefficient — Displays the Solar heat gain coefficient value associated with the window. This dimensionless indicator is the ratio of the total transmitted solar heat energy to incident solar energy. It typically ranges from 0.9 to 0.1 where lower values indicate lower solar gain. The Solar heat gain coefficient along with the Shading coefficient indicate the total solar heat gain and are used in cooling load calculations.
• Average solar gain factor env. — Used to calculate total heat gain through the window, the Average solar gain factor env. property represents the average solar gain over a 24 hour period for the air inside the room (inside the internal shading). Solar gain factor refers to an estimate of the heat gain due to transmitted and absorbed solar energy through a benchmark glazing (1/8” or 3 mm clear glass) at a specific latitude, time and orientation.
• Cyclic solar gain factor env. light — Used to calculate total heat gain through the window, the Cyclic solar gain factor env. light property represents the hourly swing of the solar gain over a 24 hour period for the air inside the room (inside the internal shading) for thermally light rooms. A thermally light room retains the transmitted solar energy to a lesser degree from a thermally heavy room. Solar gain factor refers to an estimate of the heat gain due to transmitted and absorbed solar energy through a benchmark glazing (1/8” or 3 mm clear glass) at a specific latitude, time and orientation.
• Cyclic solar gain factor env. heavy — Used to calculate total heat gain through the window, the Cyclic solar gain factor env. heavy property represents the hourly swing of the solar gain over a 24 hour period for the air inside the room (inside the internal shading) for thermally heavy rooms. A thermally heavy room retains the transmitted solar energy longer from a thermally light room. Solar gain factor refers to an estimate of the heat gain due to transmitted and absorbed solar energy through a benchmark glazing (1/8” or 3 mm clear glass) at a specific latitude, time and orientation.

• The below glazing types are also set according to the current part:
  • Plastic glazing
  • Metal Framing (curtain wall/storefront)
  • Metal Framing (entrance door)
  • Metal Framing (all others), and
  • Operable

• Pre-fabricated metal construction — When on, the construction is considered to be a pre-fabricated metal construction, and a correction is made to account for the metal included in the construction.
• Steel-framed/joist construction — When on, the construction is considered to have a steel structure, and a correction is made to calculate the infiltration of thermal energy through the steel structural in the construction.
• Heated construction — When on, the construction is considered to have its own heat source, and a correction is made to account for the heat in the construction.
• Swinging door — When on, the construction is considered to be a swinging door, and a correction is made to account for large temperature variations that can occur when the door swings open.