Rooms

This section describes how to create and use rooms.

Common Room Information

The values that can be specified for rooms are listed below. These values are used in the Edit Rooms, Room Project Schedule, and Room Master Schedule commands.

Glass Zone Type: The type of floor covering and partition type in the room. The values are taken from 1997 ASHRAE Handbook, Fundamentals, Table 35B, page 28.49.

The type that is chosen affects the thermal lag of the solar load. Lower zone types have high peak values and then quickly fall off. Higher zone types have lower peak values and slowly release the heat into the room throughout the day.

Include in Heating Load Calculation: Whether or not the room is included in the heating load calculations.

Include in Cooling Load Calculation: Whether or not 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 a certain number of air changes per hour in the room.
CFM / Person: The Minimum Supply Air is set based upon the number of people in the room.
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

Override Default Temperatures: Whether or not the heating and cooling temperatures are based upon the zone or the room type. If this box is not checked, the temperatures will be based upon the zone the room is in. If this box is checked, the temperatures will be set based upon this room type.

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

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

Override Default Relative Humidity: Whether or not the relative humidity is based upon the zone or the room type. If this box is not checked, the relative humidity will be based upon the zone the room is in. If this box is checked, the relative humidity will be set based upon this room type.

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: Choose this option to set the lighting load based upon the room area.

Watts: Choose this option to set the lighting load to a specific value.

Equipment

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

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

Watts: Choose this option to set the equipment load to a specific value.

Latent Gain: The latent equipment load in the room. It is entered as a specific value.

Ventilation (OSA)

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

Air Changes / Hour: The ventilation rate is set based upon a certain number of air changes per hour in the room.
CFM / Person: The ventilation rate is set based upon the number of people in the room.
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 the infiltration values use the same set of options for determining the infiltration rate.

Air Changes / Hour: The infiltration rate is set based upon a certain number of air changes per hour in the room.
CFM / SF of Wall: The infiltration rate is set based upon the area of wall in the room. The area of wall is based upon walls that are set to Heat Transfer and Solar Gain (Wall). See the Query Wall section for more information on setting this value.
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: Choose this option to set the number of people in the room based upon the room area.

People: Choose this option to set the number of people in the room to a specific value.

Activity Level: The sensible and latent load for each person in the room. Higher levels of activity result in higher loads. The values in this list are taken from 1997 ASHRAE Handbook, Fundamentals, Table 3, page 28.8.

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

Sensible Btu/h / Person: If Activity Level is set to Custom, this field is the sensible load for each person in the room.

Latent Btu/h / Person: If Activity Level is set to Custom, this field is the latent load for each person in the room.


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