ABSTRACT
Building energy code compliance in most countries has the following two paths: prescriptive and performance-based. Prescriptive path give specific requirements for all the building components and all the requirements have to be met for compliance. This generally limits design freedom. Performance-based path provides more design freedom and can lead to innovative design but involves more complex energy simulations and trade-offs between systems. ASHRAE 90.1-2010 has two methods for the whole building simulation: energy cost budget (ECB) method and performance rating method given in ASHRAE 90.1 Appendix G. Both methods require energy simulation of the proposed building design and the budget building design. This chapter explains how to simulate building performance in four orientations, create the base case external wall for ASHRAE 90.1-2010, model flush windows for the base case, select heating ventilation and air conditioning (HVAC) system for the base case, calculate fan power for the base case, understanding fan cycling, and specify room air to supply air temperature difference.
