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Rooms

This section describes the commands used to create and modify rooms.

Common Room Information​

The values that can be specified for rooms are listed below.

  •  Glass Zone Type: ▾ The floor covering type and partition type in the room as defined in the 1997 ASHRAE Fundamentals Handbook, Table 35B, pg 28.49. See the ASHRAE Glass Zone, Roof, & Wall Types and Roof, Wall, and Glass Zone Type Tables articles in the knowledge base for more information.

  •  ☐ Include in Heating Load Calculation Whether the room is included in the heating load calculations.

  •  ☐ Include in Cooling Load Calculation Whether the room is included in the cooling load calculations.

  •  Minimum Supply Air: The minimum amount of supply air required for the room. If the supply air for the room based upon the heating or cooling load is less than this value, the required supply air volume for the room will be set to this value.

    •  Air Changes / Hour The Minimum Supply Air is set based upon the number of air changes per hour.
    •  CFM / Person The Minimum Supply Air is set based upon the number of people.
    •  CFM / SF The Minimum Supply Air is set based upon the area of the room.
    •  CFM The Minimum Supply Air is set to a specific airflow value.

Design Temperatures​

Use the Design Temperatures section to set the goal temperatures and relative humidity for the room, and whether those values are based upon the zone the room occupies. Check the first box beside this section to specify a different Heating Temperature and/or Cooling Temperature for this room. Check the second box beside this section to specify a different Relative Humidity for this room.

  •  Heating Temperature: The goal temperature used when heating the room.

  •  Cooling Temperature: The goal temperature used when cooling the room.

  •  Relative Humidity: The goal relative humidity used when cooling the rooms in the zone.

Lighting​

Use the Lighting section to set the cooling load from lighting in the room.

  •  🔘 Watts / SF: Select this option to set the lighting load based upon the room area.

  •  🔘 Watts: Select this option to enter a specific value for the lighting load.

Equipment​

  •  Use the Equipment section to set the cooling load from equipment in the room.

  •  🔘 Watts / SF: Select this option to set the equipment load based upon the room area.

  •  🔘 Watts: Select this option to enter a specific value for the equipment load.

  •  Latent Gain: The latent equipment load in the room. Enter a specific value.

Ventilation (OSA)​

Use the Ventilation section to set the ventilation rates for the room. All of the ventilation values use the same set of options for determining the ventilation rate:

  •  Air Changes / Hour The ventilation rate is set based upon the number of air changes per hour.

  •  CFM / Person The ventilation rate is set based upon the number of people.

  •  CFM / SF The ventilation rate is set based upon the area of the room.

  •  CFM The ventilation rate is set to a specific airflow value.

  •  Cooling 1: The ventilation rate for the room when cooling.

  •  Cooling 2: The second ventilation rate for the room when cooling. The total ventilation in the room when cooling is the sum of Cooling 1 and Cooling 2.

  •  Heating 1: The ventilation rate for the room when heating.

    •  Same as Cooling The heating ventilation rate is the same as Cooling 1.

  •  Heating 2: The second ventilation rate for the room when heating. The total ventilation in the room when heating is the sum of Heating 1 and Heating 2.

    •  Same as Cooling The heating ventilation rate is the same as Cooling 2.

Infiltration​

Use the Infiltration section to set the infiltration rates for the room. All of the infiltration values use the same set of options for determining the infiltration rate:

  •  Air Changes / Hour The infiltration rate is set based upon the number of air changes per hour.

  •  CFM / SF of Wall The infiltration rate is set based upon the area of the walls in the room that are set to 🔘 Heat Transfer and Solar Gain (Wall). See the Query Wall section for more information about this setting.

  •  CFM The infiltration rate is set to a specific airflow value.

  •  Cooling: The infiltration rate for the room when cooling.

  •  Heating: The infiltration rate for the room when heating.

    •  Same as Cooling The heating infiltration rate is the same as Cooling.

People​

Use the People section to set the number of people in the room.

  •  🔘 SF / Person: Select this option to set the number of people in the room based upon the room area.

  •  🔘 People: Select this option to enter a specific value for the number of people in the room.

  •  Activity Level: ▾ The sensible and latent load for each person in the room. Higher levels of activity result in higher loads. The Sensible Btu/h / Person and Latent Btu/h / Person values will be set based upon the selected activity level. Those values are taken from the 1997 ASHRAE Handbook, Fundamentals, Table 3, pg 28.8.

    •  Custom Enter the load for each person manually using the Sensible Btu/h / Person and Latent Btu/h / Person fields.
    •  Seated at theater Sensible: 225 Latent: 105
    •  Seated at theater, night Sensible: 245 Latent: 105
    •  Seated, very light work Sensible: 245 Latent: 155
    •  Moderate office work Sensible: 250 Latent: 200
    •  Standing Sensible: 250 Latent: 250
    •  Eating (including food) Sensible: 275 Latent: 275
      Also includes 30 Btu/h sensible and 30 Btu/h latent for food per person.
    •  Light bench work Sensible: 275 Latent: 475
    •  Moderate dance Sensible: 305 Latent: 545
    •  Walking; light machine work Sensible: 375 Latent: 625
    •  Bowling; heavy work Sensible: 580 Latent: 870
    •  Heavy machine work; lifting Sensible: 635 Latent: 965
    •  Athletics Sensible: 710 Latent: 1090

  •  Sensible Btu/h / Person: The sensible load for each person in the room. If Activity Level ▾ is set to Custom, this value can be entered manually.

  •  Latent Btu/h / Person: The latent load for each person in the room. If Activity Level ▾ is set to Custom, this value can be entered manually.