Lighting Energy: Per ASHRAE 90.1-1999, 9.3.1, exception (a), all display or accent lighting that is essential to the function performed in galleries, museums and monuments can be exempted from the lighting power density calculations (and thus considered a process load) as long as it is in addition to general lighting, and is controlled by an independent control device. It appears that both the rainforest exhibit display lighting and the penguin exhibit lighting fall within this exemption, and would therefore be modeled as process energy. HVAC Energy: ASHRAE 90.1-1999 defines process energy as "energy consumed in support of a manufacturing, industrial, or commercial process other than conditioning spaces and maintaining comfort and amenities for the occupants of a building." The HVAC (heating, cooling and fans) for the penguin exhibit and the rainforest exhibit conform to the definition of "process energy" in ASHRAE 90.1-1999. Similar to a data center, the conditions required in these spaces are entirely driven by process functions (care of the animals and plants), and are not tied to providing occupant comfort. The HVAC (heating, cooling and fans) for the research collections area does not conform to the definition of "process energy". Similar to a museum, or a library, the conditioning for this space likely serves the dual function of providing occupant comfort and maintaining optimal conditions for the material stored in the collections area. Therefore, as with libraries and museums, the air conditioning system for this space still must be modeled as part of the regulated building energy. Please note, however, that ASHRAE 90.1-1999 does allow exceptions for modeling humidity controls in spaces where specific humidity levels are required to satisfy process needs (6.2.3.7(b) and 6.3.2.3(d)). These exceptions can be incorporated into the building energy model for the HVAC systems serving the research collections area. Applicable Internationally.