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American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) 55 - Thermal Environmental Conditions for Human Occupancy

ASHRAE 62.1 - Ventilation for Acceptable Indoor Air Quality

ASHRAE 90.1 - Energy Standard for Buildings Except Low-Rise Residential Buildings

ASHRAE 189.1 - Standard for the Design of High-Performance Green Buildings

Energy Modeling CXS

The mission of the Energy Modeling Center of Expertise in Sustainability (CXS) is to provide guidance on how to better utilize available energy modeling software to develop energy models in assisting with the design and construction of high performance sustainable and energy efficient buildings. Energy modeling is a means to simulate the theoretical energy usage of a building by examining the parameters that affect a building's energy consumption and comparing energy saving strategies between a baseline and proposed building alternatives. Factors such as building orientation; roof and wall construction; placement of windows; heating, ventilation, and air conditioning (HVAC) equipment; lighting; internal building operations; etc., affect how much energy a building will use. Energy modeling, when performed at the beginning of the design phase, helps the design team compare energy usage for potential systems to select the respective building components, systems and equipment necessary to achieve the specified energy reduction targets. During construction, any contractor requests for variances or product substitutions that could potentially impact the building's energy usage should be compared against the energy model.

The Energy Modeling CXS provides technical guidance on how to utilize commercially available energy modeling software to develop energy models to help achieve high performance sustainable and energy efficient buildings. By developing accurate energy models to simulate a building's theoretical energy usage and understanding the parameters required for the energy model, designers and stakeholders can make informed decisions on design and sustainability features to be incorporated in projects.