ASHRAE Baseline Model Question

Cooling is required to be modeled in the Proposed case even if it is not in the design (see Table G3.1-10 Proposed (d)). The work around is to set the cooling temperature very high so the system never comes on. The temperature setting must be identical in both models. For ventilation how are you meeting the requirements of ASHRAE 62.1-2007 for IEQp1? The baseline is always modeled according to Appendix G.

No...unless you have less heating than stated in table 3.1, but more than or equal to 10 W/m2...then it is semi-heated. Be sure which climate zone you fall into. As for ventilation... Rule 1) baseline outdoor air rate = proposed design outdoor air rate (whether mechanical or natural) Rule 2) The manditory ventilation rates apply, also for naturally ventilated spaces, meaning you need to apply ASHRAE 62.1-2007 section 5.1. This usually means demonstrating compliance with the 4% rule for perimeter spaces and the 8% rule for interior spaces. In the energy model, you must model this ventilation as reasonably as you can. However, the method is left up to you. If you are trying for the increased ventilation credit, then you must also model the natural ventilation in the required detail for that credit using a bulk nodal massflow analysis. Programs like CONTAM could do this...and could also give you possibly infiltration output data files that you could feed into your energy simulation. I like energyplus airflownetwork for bulk nodal analysis and they also have good simple infiltration objects.