Lighting Tab

Acronym - A short description (up to 20 characters).

Description - A  detailed description (up to 50 characters).

Category - Select a space type from the list. For space type not listed select the one most representative from the list.  This is a key selection that will affect the lighting allowance.

 

Dimensions

NOTE:  The area and volume of the zone to which the space belongs are automatically calculated by summing the individual values for all spaces under the zone. This occurs any time a change is made to space dimensions or spaces are added or deleted. Maximum Zone area is limited to 100,000 SF and maximum Zone Volume is limited to 1,000,000 CF. Space dimensions specified here should conform to this limitation.

Width - Specify the space width in feet.

Depth - Specify the space depth in feet.

Height - Specify the space height in feet.

Multiplier - Used to specify the number of identical spaces. Use this input for spaces that are exactly the same, instead of adding a new space under the zone.

RCH - Specifies the Room Cavity Height. This is defined to be the distance between the workplane and the luminaire mounting height of the space.

 

Lighting

Additional Control Methods - Allows the use of additional space-wide lighting controls. These are meant to allow for additional interior lighting power allowances, as per ASHRAE 90.1-2010 Table 9.6.2.

Type - This field describes the various lighting types. They are available in the drop down box. Click here for details.

Category - Classified the use of the lighting.

No. of Luminaires - Specify the number of light fittings in that space.

Watts per Luminaire - Specify the lighting wattage per fitting.

Control type - This field describes the type of control used for the particular lighting. A value of "None" is not allowed for this field.

No. of Controls - This field shows the number of control points for the particular lighting.

Area Lighted - For a few categories of the lighting type (for example: category 22 - Specific Retail Display), this extra field requires the user to enter the area lighted. This field is automatically unlocked for the categories for which this values is required.  

See the section on Working With Grids to add, delete and modify the Lighting data.

 

Loads Tab

For code calculations, the Loads tab on the Space form is provided for information only.  Default values are set by the program based on the space type selected. All inputs on the space loads form will be used in case of non-code simulation (LEED, Federal Tax Deduction Calculations etc.) only when the 'Override Internal Loads' box on the 'Summary&Settings' tab is checked.

Equipment - Equipment loads should be entered in either 'W/sq ft' or 'kW'. If both values are entered, they are added together for a combined load in each space. All the space equipment loads are summed up as the total equipment load on every zone. Equipment load is purely sensible in nature and contributes to the heating or cooling loads in the zone. The 'Equipment' schedule from the associated Zone Profile will control the amount of equipment load on the zone for every hour in the annual simulation. The equipment load is typically the thermal (heat load) fraction of all the plug loads in that space. 

Source - The source load is entered in Btu/hr and is the sum of all the plug loads in the space. Source loads do not contribute to the heating or cooling loads in the space and zone.

Occupants - The maximum number of 'Occupants' in the space should be entered as either a value of 'Number of People' or as a value of 'Area per person'  or as a combination of the two. The people load on the space will be modified as per the 'People' schedule specified in the profile associated with the zone that contains the space. Occupant load will affect the outside (fresh) air fraction required for the zone during an annual simulation unless a fixed value of outside air has been specified at the zone level.

 

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