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Room

Overview

The Room Results provide essential data for heat load and heat gain calculations, including Ventilation, Thermal Bridging, and Material properties. These values can be reviewed and edited in the Floor Plan Mode or specific sections of the Heat Load Settings.

Below is a detailed explanation of each result and how to manage it.

Room Temperature

  • What it is: Room Design Temperature

  • How to review: This value can be reviewed in the Room's properties in Floor Plan mode and for Custom Rooms also in the Heat Load Settings.

Winter Exterior Temperature

  • What it is: Winter Exterior Temperature (Outside)

  • How to review: This value can be reviewed in the Wall / Door / Window / Skylight or Vaulted Ceiling's properties in Floor Plan mode and in General settings for Heat Load Settings.

Ground Temperature

  • What it is: Temperature of the Ground

  • How to review: This value can be reviewed in the Ground Floor Room's properties in the Floor Plan mode and in General settings for Heat Load Settings.

Floor Type

  • What it is: Bottom Floor, Suspended Floor or Party Floor

  • How to review: This can be reviewed in the Room's properties in the Floor Plan mode.

Floor Construction

  • What it is: Floor Construction used for the Floor

  • How to review: This can be assigned in the Room's properties in the Floor Plan mode or in the Constructions in the Heat Load Settings.

Floor U Value

  • What it is: Thermal Conductivity of the Simple Construction (Material) used for the Floor.

  • How to review: This value can be reviewed in the Room's properties in the Floor Plan mode or in the Constructions section in the Heat Load Settings.

Roof Construction

  • What it is: Material used for the Roof / Vaulted Ceiling

  • How to review: This can be assigned in the Room's properties in the Floor Plan mode or in the Constructions section under Material Assignments in the Heat Load Settings.

Roof U Value

  • What it is: Thermal Conductivity of the Material used for the Roof / Vaulted Ceiling

  • How to review: This value can be reviewed in the Room's properties in the Floor Plan mode / Vaulted Ceiling's properties in the Floor Plan mode, or in the Constructions section in the Heat Load Settings.

Room Area

  • What it is: The total area of the Room, calculated as width multiplied by length.

  • How to review: This value can be reviewed and edited in the room's properties in Floor Plan Mode.

Room Volume

  • What it is: The total volume of the Room, calculated as the room area multiplied by its height.

  • How to review: The Height is set by default in Heat Load > Settings but can be overridden in the Room's properties in Floor Plan mode.

Room Perimeter

  • What it is: The total perimeter of the Room (total length of walls).

  • How to review: The perimeter may be adjusted by resizing the Room in Floor Plan mode.

Fresh Air Change Rate

  • What it is: The mechanical ventilation air exchange rate per hour, taken from the Fresh Air Requirement Standard in Methods.

  • How to review:

    • The rate can be reviewed and overridden for individual rooms in the Air Changes tab of the room's properties.

Infiltration Air Change

  • What it is: The air exchange rate due to building's leakage, taken from the Infiltration air Change Rate Standard in Methods.

  • How to review:

    • The rate can be reviewed and overridden for specific rooms in the Air Changes tab of the room's properties.

Total Air Change

  • What it is: Sum of Fresh Air Change Rates and Infiltration Air Change Rates.

  • How to review:

    • The Fresh Air Change Rates and Infiltration Air Change Rates can be reviewed and overridden for specific rooms in the Air Changes tab of the room's properties.

Thermal Bridging Coefficient

  • What it is: A coefficient applied to account for additional heat transfer through thermal bridges, taken from Methods > General > Common.

  • How to review:

    • Adjust this value for the entire project in Heat Load > General or override it in the Room’s properties in Floor Plan Mode.

Spare Capacity

  • What it is: A percentage added to heat loss or heat gain to account for unknown factors, future considerations, or a conservative design.

  • How to review:

    • Configure the Spare Capacity percentage in Heat Load > General or override it in the Room’s properties in Floor Plan Mode.

Heat Loss

The total heat loss in the Room, calculated using material properties, ventilation, thermal bridging, and Spare Capacity.

Heat Loss Formula

Heat Loss = Material Heat Loss + Ventilation Heat Loss + Thermal Bridging Loss + Spare Loss

Heat Loss Through Internal / External / Party Wall

  • What It Is: The heat loss calculation is determined by the Wall's area, U-value, and the temperature difference between the inside and outside.

Heat = Area × U-Value × ΔT

Where:

  • Heat: The heat loss (W in metric, BTU/h in imperial)

  • Area: The wall area (m² in metric, ft² in imperial)

  • U-Value: The thermal transmittance of the wall (W/m²·K in metric, BTU/h·ft²·°F in imperial)

  • ΔT: The temperature difference across the wall (°C in metric, °F in imperial)

How to Review:

  • The Wall area and U-value can be reviewed in the wall's properties.

  • The Winter Exterior Temperature is set in Heat Load > General and may be auto-filled based on the Project Address.

    • This can be overridden in the room’s properties in the Floor Plan Mode

  • Room design temperatures can be overridden in the room’s properties in Floor Plan Mode

Heat Loss Through Internal / External Door

  • What It Is: The heat loss calculation is determined by the Door's area, U-value, and the temperature difference between the inside and outside.

Heat = Area × U-Value × ΔT

Where:

  • Heat: The heat loss (W in metric, BTU/h in imperial)

  • Area: The door area (m² in metric, ft² in imperial)

  • U-Value: The thermal transmittance of the door (W/m²·K in metric, BTU/h·ft²·°F in imperial)

  • ΔT: The temperature difference across the door (°C in metric, °F in imperial)

How to Review:

  • The Door area and U-value can be reviewed in the door's properties.

  • The Winter Exterior Temperature is set in Heat Load > General and may be auto-filled based on the project address.

    • This can be overridden in the Room’s properties in the Floor Plan mode

  • Room design temperatures can be overridden in the room’s properties in the Floor Plan mode

Heat Loss Through Roof/Ceiling

  • What It Is: The heat loss calculation is determined by the Roof/Ceiling's area, U-value, and the temperature difference between the inside and outside.

Heat = Area × U-Value × ΔT

Where:

  • Heat: The heat loss (W in metric, BTU/h in imperial)

  • Area: The roof/ceiling area (m² in metric, ft² in imperial)

  • U-Value: The thermal transmittance of the roof/ceiling (W/m²·K in metric, BTU/h·ft²·°F in imperial)

  • ΔT: The temperature difference across the roof (°C in metric, °F in imperial)

How to Review:

  • The Roof/Ceiling area can be reviewed in the Floor Plan mode

  • The Roof/Ceiling U-value can be reviewed in the Roof/Ceiling’s properties.

  • The Winter Exterior Temperature is set in Heat Load > General and may be auto-filled based on the project address.

    • This can be overridden in the Room’s properties in the Floor Plan mode

  • Room design temperatures can be overridden in the room’s properties in the Floor Plan mode

Heat Loss Through Floor

  • What It Is: The heat loss calculation is determined by the Floor's area, U-value, and the temperature difference between the inside and outside.

Heat = Area × U-Value × ΔT

Where:

  • Heat: The heat loss (W in metric, BTU/h in imperial)

  • Area: The floor area (m² in metric, ft² in imperial)

  • U-Value: The thermal transmittance of the floor (W/m²·K in metric, BTU/h·ft²·°F in imperial)

  • ΔT: The temperature difference across the floor (°C in metric, °F in imperial)

How to Review:

  • The Floor area can be reviewed in the Floor Plan mode.

  • The Floor U-value can be reviewed in the Floor's properties.

  • Room design temperature’s can be overridden in each of the Room’s properties in the Floor Plan mode:

    • For ground levels, the Ground Temperature is set in Heat Load > General and may be auto-filled based on the project address.

      • This can be overridden in the Room’s properties in the Floor Plan mode

Heat Loss Through Window

  • What It Is: The heat loss calculation is determined by the Window's area, U-value, and the temperature difference between the inside and outside.

Heat = Area × U-Value × ΔT

Where:

  • Heat: The heat loss (W in metric, BTU/h in imperial)

  • Area: The floor area (m² in metric, ft² in imperial)

  • U-Value: The thermal transmittance of the Window (W/m²·K in metric, BTU/h·ft²·°F in imperial)

  • ΔT: The temperature difference across the Window (°C in metric, °F in imperial)

Heat Loss Through Ventilation Formula

Heat = 1/3 x Volume x Total Air Changes x ΔT

Where:

  • Heat: The Heat Loss (W in metric, BTU/h in imperial)

  • Volume: Room Volume (m³ in metric, ft³ in imperial)

  • Total Air Changes: Total Air Change Rates in ACH

  • ΔT: The temperature difference between outside and room design temperature (°C in metric, °F in imperial)

How to Review:

  • Verify the Room volume and air change rates (both Fresh Air and Infiltration) in the Air Changes tab of the room's properties.

  • Check the Winter Indoor Temperature of the room and Winter Exterior Temperature in Heat Load > General.

Please note the formula above does not apply to EN12831-1:2017

Heat Loss Through Ventilation (Mechanical)

Heat loss due to Fresh Air changes, calculated based on the room volume and the difference between the internal and external temperatures.

Heat = 1/3 x Volume x Air Changes x ΔT

Where:

  • Heat: The Heat Loss (W in metric, BTU/h in imperial)

  • Volume: Room Volume (m³ in metric, ft³ in imperial)

  • Air Changes: Fresh Air Change Rates in ACH

  • ΔT: The temperature difference between outside and room design temperature (°C in metric, °F in imperial)

How to Review:

  • Verify the Room volume and Fresh Air Change Rate in the Air Changes tab of the room's properties.

  • Check the Winter Indoor Temperature of the room and Winter Exterior Temperature in Heat Load > General.

Please note the formula above does not apply to EN12831-1:2017

Heat Loss Through Infiltration

Heat loss due to Infiltration Air Changes, calculated based on the room volume and the difference between the internal and external temperatures.

Heat = 1/3 x Volume x Air Changes x ΔT

Where:

  • Heat: The Heat Loss (W in metric, BTU/h in imperial)

  • Volume: Room Volume (m³ in metric, ft³ in imperial)

  • Air Changes: Infiltration Air Change Rates in ACH

  • ΔT: The temperature difference between outside and room design temperature (°C in metric, °F in imperial)

How to Review:

  • Verify the Room volume and Infiltration Air Change Rate in the Air Changes tab of the room's properties.

  • Check the Winter Indoor Temperature of the room and Winter Exterior Temperature in Heat Load > General.

Please note the formula above does not apply to EN12831-1:2017

Heat Loss Through Thermal Bridging

  • What it is: A percentage of the material heat loss added to account for Thermal Bridging (e.g., 0.1 = 10%).

How to review: Adjust the Thermal Bridging coefficient in Heat Load > General or override it in the Room’s properties.

Heat Loss Through Spare Loss

  • What it is: Additional heat loss added as a percentage of the calculated total.

How to review: Configure the Spare Loss percentage in Heat Load > General or override it in the Room’s properties.

Heat Gain

  • What it is: The total heat gain in the room, considering materials, ventilation, internal sources, solar gain, and spare capacity.

Sensible Heat Gain

The sensible component of the Room's total Heat Gain during the Room's coincident peak.

Latent Heat Gain

The latent component of the Room's total Heat Gain during the Room's coincident peak.

Sensible Heat Ratio

Sensible Heat Ratio is how much of the total heat being removed from a space is related to a change in temperature versus a change in moisture.

Sensible Heat Ratio = Sensible Heat Gain / Total Heat Gain

Heat Gain Peak

The month and hour of the Room’s highest coincident peak Heat Gain value across the 24 design days.

Conductive Heat Gain Through Window

The Conductive Heat Gain component of the Room’s Window Heat Gain during the room’s coincident peak.

Solar Heat Gain Through Window

The Solar Heat Gain component of the Room’s Window Heat Gain during the room’s coincident peak.

Heat Gain Through Window

The Window-only component of the Room’s Total Heat Gain during the room’s coincident peak.

This component includes both conductive & solar heat gains.

Heat Gain Through Internal Wall

The Internal Wall-only component of the Room’s Total Heat Gain during the room’s coincident peak.

This component refers to the conductive heat gain through the wall.

Heat Gain Through External Wall

The External Wall-only component of the Room’s Total Heat Gain during the room’s coincident peak.

This component refers to the conductive heat gain through the wall.

Heat Gain Through Party Wall

The Party Wall-only component of the Room’s Total Heat Gain during the room’s coincident peak.

This component refers to the conductive heat gain through the wall.

Heat Gain Through Internal / External / Party Wall Formula

  • What It Is: The Heat Gain calculation is determined by the Wall's area, U-value, and the temperature difference between the inside and outside.

Heat = Area x U-Value x ΔT

Where:

  • Heat: Sensible Heat Gain (W in metric, BTU/h in imperial)

  • Area: The wall area (m² in metric, ft² in imperial)

  • U-Value: The thermal transmittance of the wall (W/m²·K in metric, BTU/h·ft²·°F in imperial)

  • ΔT: The temperature difference across the wall (°C in metric, °F in imperial)

Heat Gain Through Internal Door

The Internal Door-only component of the Room’s Total Heat Gain during the room’s coincident peak.

This component refers to the conductive heat gain through an fully opaque door.

Heat Gain Through External Door

The External Door-only component of the Room’s Total Heat Gain during the room’s coincident peak.

This component refers to the conductive heat gain through an fully opaque door.

Heat Gain Through Internal / External Door Formula

  • What It Is: The Heat Gain calculation is determined by the Door's area, U-value, and the temperature difference between the inside and outside.

Heat = Area x U-Value x ΔT

Where:

  • Heat: Sensible Heat Gain (W in metric, BTU/h in imperial)

  • Area: The door area (m² in metric, ft² in imperial)

  • U-Value: The thermal transmittance of the door (W/m²·K in metric, BTU/h·ft²·°F in imperial)

  • ΔT: The temperature difference across the door (°C in metric, °F in imperial)

Heat Gain Through Ceiling

The Ceiling-only component of the Room’s Total Heat Gain during the room’s coincident peak.

This component refers to the conductive heat gain through the ceiling.

Heat Gain Through Roof

The Roof-only component of the Room’s Total Heat Gain during the room’s coincident peak.

This component refers to the conductive heat gain through the roof.

Heat Gain Through Roof / Ceiling Formula

  • What It Is: The Heat Gain calculation is determined by the Roof/Ceiling's area, U-value, and the temperature difference between the inside and outside.

Heat = Area × U-Value × ΔT

Where:

  • Heat: Sensible Heat Gain (W in metric, BTU/h in imperial)

  • Area: The roof/ceiling area (m² in metric, ft² in imperial)

  • U-Value: The thermal transmittance of the roof/ceiling (W/m²·K in metric, BTU/h·ft²·°F in imperial)

  • ΔT: The temperature difference across the roof (°C in metric, °F in imperial)

Heat Gain Through Floor

The Floor-only component of the Room’s Total Heat Gain during the room’s coincident peak.

This component refers to the conductive heat gain through the floor.

Heat Gain Through Floor Formula

  • What It Is: The heat gain calculation is determined by the floor's area, U-value, and the temperature difference between the inside and outside.

Heat = Area x U-Value x ΔT

Where:

  • Heat: Sensible heat gain (W in metric, BTU/h in imperial)

  • Area: The floor area (m² in metric, ft² in imperial)

  • U-Value: The thermal transmittance of the floor (W/m²·K in metric, BTU/h·ft²·°F in imperial)

  • ΔT: The temperature difference across the floor (°C in metric, °F in imperial)

Heat Gain Through Fresh Air

The Heat Gain from the ventilation system’s outside air (fresh air) entering the Room during the room’s coincident peak.

Sensible Heat Gain Through Fresh Air

The Sensible Heat Gain from the ventilation system’s outside air (fresh air) entering the Room during the room’s coincident peak.

Latent Heat Gain Through Fresh Air

The Latent Heat Gain from the ventilation system’s outside air (Fresh Air) entering the Room during the room’s coincident peak.

Heat Gain Through Infiltration

The Heat Gain from the Infiltration coming into the Room during the room’s coincident peak.

Sensible Heat Gain Through Infiltration

The Sensible Heat Gain from the Infiltration coming into the Room during the Room’s coincident peak.

Latent Heat Gain Through Infiltration

The Latent Heat Gain from the Infiltration coming into the Room during the room’s coincident peak.

Heat Gain Through Thermal Bridging

  • What it is: A percentage of the material Heat Gain added to account for Thermal Bridging.

How to review: Adjust the thermal bridging coefficient in Heat Load > General or override it in the room’s properties.

Heat Gain Through Internal Sources

The Total Heat Gain from the Internal Heat Sources within the room, during the room’s coincident peak.

Sensible Heat Gain Through Internal Sources

The Total Sensible Heat Gain from the internal Heat Sources within the Room, during the room’s coincident peak.

Latent Heat Gain Through Internal Sources

The Total Latent Heat Gain from the internal Heat Sources within the Room, during the room’s coincident peak.

Heat Gain Through Solar Gain

The Solar Gain-only component of the Room’s Total Heat Gain during the room’s coincident peak.

Heat Gain Through Spare Gain

The spare capacity component of the Room’s Total Heat Gain during the room’s coincident peak.

Please note it's only applied if Heat Gain spare capacity is set in Settings.

Underfloor Heating Results

Floor Temperature

  • What it is: The actual surface temperature of the Floor.

  • How it is calculated: It is an output based on the Floor Type, Pipe Size, delta T (difference between supply and return water temperature), and Loop Spacings.

  • How to review: Ensure these inputs are accurate in the System Settings and Room’s properties, where they may have been overridden.

Loop Mean Water Temperature

  • What it is: The average temperature of the flow and return water in the loop.

  • How to review: These values are set in the Technical tab of manifold properties under UFH Flow Temperature and UFH Return Temperature.

Loop Spacing

  • What it is: The spacing between pipes in the loop, which influences the Heat Output and Floor Temperature.

  • How it is calculated: It is an output based on the Floor Type, Pipe Size, and delta T (difference between supply and return water temperature)

  • How to review: Ensure these inputs are accurate in the System Settings and Room’s properties, where they may have been overridden.

Loop Heat Output

  • What it is: The heat output provided by the loop, determined by the Floor Type, Pipe Size, delta T, and Loop Spacings.

  • How it is calculated: It is an output based on the Floor Type, Pipe Size, and delta T (difference between supply and return water temperature).

  • How to review: Ensure these inputs are accurate in the System Settings and Room’s properties, where they may have been overridden.

Loop ID

  • What it is: A unique identifier for the loop, used for organization in Schedules and Reports.

  • How to review: This ID is auto-generated and displayed in Schedules and Reports.

Loop Pressure Drop

  • What it is: The friction loss of water as it circulates through the loop. This is calculated using the Darcy-Weisbach equation.

ΔP = f × (L / D) × (ρ × v²) / 2

Where:

  • ΔP: Pressure drop (Pa or psi)

  • f: Friction factor (dimensionless, depends on pipe roughness and Reynolds number)

  • L: Length of the pipe (m or ft)

  • D: Internal diameter of the pipe (m or ft)

  • ρ: Fluid density (kg/m³ or lb/ft³)

  • v: Fluid velocity (m/s or ft/s)

How to Review: Verify Loop Spacings, Pipe Size, and water properties in the System Settings and Room’s properties, where they may have been overridden.

Loop Length

  • What it is: The total length of pipe in the loop, including the distance from the Manifold to the Room, including the vertical height between the Manifold and the Floor, and within the room itself.

  • How to Review: Review the loop’s path, spacings, and height above floor in the Inlets and Outlets tabs of the Manifold properties.

Loop Volume

  • What it is: The total water volume in the loop, calculated as the pipe’s internal diameter multiplied by its length.

TPiV = π × (Internal Diameter ÷ 2)² × Length

Where:

  • TPiV: Total Pipe Volume

  • Internal Diameter: The internal diameter of the pipe (consistent units, e.g., meters or inches)

  • Length: The length of the pipe (consistent units, e.g., meters or feet)

How to Review: Check the pipe internal diameter and pipe length in the System Settings and the Room’s properties, where it may have been overridden.

EN12831-1:2017 Filters

Once EN12831-1:2017 is selected as the calculation method, there are specific results that are important to note for EN12831 calculations that could be relevant. You can display or hide relevant results this within your project in the Results > Filters under the Room section.

Heat Loss Results (EN12831-1:2017)

EN standard calculation takes into account undiversified and diversified heat losses to come up with total values, unlike other traditional methods (eg. CIBSE).

  • Heat Loss (Undiversified): The EN12831 calculation takes into account undiversified and diversified heat losses to come up with total values, unlike other traditional methods (CIBSE)

  • Heat Loss (Diversified): The EN12831 calculation takes into account undiversified and diversified heat losses to come up with total values, unlike other traditional methods (CIBSE)

  • Heat Loss Through Ventilation (Undiversified): The EN12831 calculation takes into account diversified & undiversified ventilation unlike other traditional methods (eg. CIBSE)

  • Heat Loss Through Ventilation (Diversified): The EN12831 calculation takes into account diversified & undiversified ventilation unlike other traditional methods (eg. CIBSE)

Fresh Air Changes Results

EN standard calculation take into account diversity to calculate air changes, unlike other traditional methods (eg. CIBSE)

  • Fresh Air change rate of the room per hour: The EN12831 calculation takes into account diversity to calculate air changes, unlike other traditional methods (CIBSE)

  • Infiltration Air change rate of the room per hour: The EN12831 calculation takes into account diversity to calculate air changes, unlike other traditional methods (CIBSE)

  • Total Air change rate of the room per hour: The EN12831 calculation takes into account diversity to calculate air changes, unlike other traditional methods (CIBSE)

Room Ventilation Results

Additional results filters to show or verify underlying EN12831 calculations. These results and calculations won't be in other traditional methods (eg. CIBSE) as they may not be relevant.

  • Room Envelope Area (A_env,i): This value corresponds to the Envelope area for room (i) (ie. A_env,i) which is a calculation component for EN12831.

  • Room ATD Design Air Flow (q_v,ATD,design,i): This value corresponds to the design air volume flow of the ATDs in the room (ie. q_v,ATD,design,i) which is a calculation component for EN12831.

  • Room Exhaust Flow Rate (q_v,exh,i): This value corresponds to the Exhaust air flow rate for space (i) (ie. q_v,exh,i) which is a calculation component for EN12831.

  • Room Supply Flow Rate (q_v,sup,i): This value corresponds to the Supply air flow rate for space (i) (ie. q_v,sup,i) which is a calculation component for EN12831.

  • Air Transfer (q_v,transfer,i): This value corresponds to a calculation requirement for EN123831

  • Room Combustion Air Flow (q_v,comb,i): This value corresponds to the Combustion air flow rate for space (i) (ie. q_v,comb,i) which is a calculation component for EN12831.

  • Room Technical Air Flow (q_v,techn,i): This value corresponds to the Technical air flow rate for space (i) (ie. q_v,techn,i) which is a calculation component for EN12831.

  • Room External Vent Flow (q_v,leak+ATD,i): This value corresponds to the external air volume flow into zone through ATDs (ie. q_v,leak+ATD,i) which is a calculation component for EN12831.

  • Room External Air Flow (q_v,env,i): This value corresponds to the Air flow rate due to envelope leakage for space (i) (ie. q_v,env,i) which is a calculation component for EN12831.

  • Room Min Fresh Air Flow (q_v,min,i): This value corresponds to the Minimum air flow rate required for space (i) (ie. q_v,min,i) which is a calculation component for EN12831.

  • Room Large Opening Flow (q_v,open,i): This value corresponds to the Air flow rate through openings in space (i) (ie. q_v,open,i) which is a calculation component for EN12831.

  • Room Ventilation Heat Loss (Φ_V,i): This value corresponds to the Ventilation heat loss for heated space (i) (ie. Φ_V,i) which is a calculation component for EN12831.

  • Room Ventilation Heat Gain (Φ_V,i): This value corresponds to the Ventilation heat loss for heated space (i) (ie. Φ_V,i) which is a calculation component for EN12831.

  • Room Vent Loss (diversified): This value corresponds to a calculation requirement for EN123831

  • Room Vent Gain (diversified): This value corresponds to a calculation requirement for EN123831

Zone Ventilation Results

Additional results filters to show or verify underlying EN12831 calculations. These results and calculations won't be in other traditional methods (eg. CIBSE) as they may not be relevant.

  • Zone Facades: This value corresponds to a calculation requirement for EN123831

  • Zone Facade Factor (f_fac,z): This value corresponds to the Adjustment factor for exposed facades (ie. ffac,z) which is a calculation component for EN12831.

  • Zone Envelope Area (A_env,z): This value corresponds to the Envelope area for zone (z) (ie. A_env,z) which is a calculation component for EN12831.

  • Zone Height Above Ground (h_g,z): This value corresponds to a calculation requirement for EN123831.

  • Zone Total Height (Delta h_z): This value corresponds to a calculation requirement for EN123831.

  • Zone ATD Design Flow (q_v,ATD,design,z): This value corresponds to the design air volume flow of the ATDs in the zone (ie. q_v,ATD,design,z) which is a calculation component for EN12831.

  • Zone Flow via ATDs (q_v,ATD,50,z): This value corresponds to the air flow into zone through ATDs at 50 Pa (ie. q_v,ATD,50,z) which is a calculation component for EN12831.

  • Zone ATD Authority (aATD,z): This value corresponds to the ATD authority of the ATDs in zone (ie. aATD,z) which is a calculation component for EN12831.

  • Zone Air Tightness (qenv,50): This value corresponds to the specific air permeability of envelope at 50 Pa (ie. qenv,50) which is a calculation component for EN12831.

  • Zone Leak Exponent (v,leak,z): This value corresponds to the exponent for leakages (ie. v,leak,z) which is a calculation component for EN12831.

  • Zone Design Press. Diff (Delta pATD,design,z): This value corresponds to the design pressure difference of the ATDs (ie. DeltapATD,design,z) which is a calculation component for EN12831.

  • Zone Orientation Factor (f_dir): This value corresponds to the Orientation factor (ie. f_dir) which is a calculation component for EN12831.

  • Zone Vol Flow Factor (f_qv,z): This value corresponds to the volume flow factor (ie. fqv,z) which is a calculation component for EN12831.

  • Zone Exhaust Flow Rate (q_v,exh,z): This value corresponds to the Exhaust air volume flow from zone (z) (ie. qv,exh,z) which is a calculation component for EN12831.

  • Zone Supply Flow Rate (q_v,sup,z): This value corresponds to the Supply air volume flow into zone (z) (ie. qv,sup,z) which is a calculation component for EN12831.

  • Zone Combustion Air Flow (q_v,comb,z): This value corresponds to the Combustion/technical air flow into zone (z) (ie. qv,comb,z) which is a calculation component for EN12831.

  • Zone Adjustment Fez (f_e,z): This value corresponds to a calculation requirement for EN123831

  • Zone Add. Infiltration (q_v,inf-add,z): This value corresponds to the Air flow through additional infiltration (ie. q_v,inf-add,z) which is a calculation component for EN12831.

  • Zone Flow via Envelope (q_v,env,z): This value corresponds to the External air volume flow through envelope (ie. q_v,env,z) which is a calculation component for EN12831.

  • Zone Ext. Air via Atd (qv,ATD,z): This value corresponds to the Air flow through air terminal devices for zone (ie. q_v,ATD,z) which is a calculation component for EN12831.

  • Zone Ext. Air via Leakage (q_v,leak,z): This value corresponds to the external air volume flow through leakages (ie. q_v,leak,z) which is a calculation component for EN12831.

  • Zone Large Openings Flow (q_v,open,z): This value corresponds to the External air volume flow through large openings (ie. q_v,open,z) which is a calculation component for EN12831.

  • Zone Ventilation Loss (Φ_V,z loss): This value corresponds to the Ventilation heat loss for zone (ie. Φ_V,z) which is a calculation component for EN12831.

  • Zone Ventilation Gain (Φ_V,z gain): This value corresponds to the Ventilation heat loss for zone (ie. Φ_V,z) which is a calculation component for EN12831.