Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
In ASHRAE 90.1-2007 (and 2010 and 2013 and probably 2016, too) Appendix G, the baseline thermal blocks should be the same as the Propose Design. See Table G3.1 No. 7 and 8. Nothing requires (or even allows) the model zoning to be different.
The 'system per floor' requirement for baseline systems 5, 6, 7 and 8 simply means that all the thermal blocks (except the ones that meet the G3.1.1 exceptions) on the same floor are conditioned by a single baseline system. I do not know the exact reason why this requirement exists, but would guess that since those systems are multi-zone, ASHRAE has to set some standards for which zones are served by which system, and 'per floor' is a pretty straightforward standard to follow.
| | 2 | No.2 Revision |
In ASHRAE 90.1-2007 (and 2010 and 2013 and probably 2016, too) Appendix G, the baseline thermal blocks should be the same as the Propose Design. See Table G3.1 No. 7 and 8. Nothing in the Performance Rating Method requires (or even allows) the model zoning to be different.
The 'system per floor' requirement for baseline systems 5, 6, 7 and 8 simply means that all the thermal blocks (except the ones that meet the G3.1.1 exceptions) on the same floor are conditioned by a single baseline system. I do not know the exact reason why this requirement exists, but would guess that since those systems are multi-zone, ASHRAE has to set some standards for which zones are served by which system, and 'per floor' is a pretty straightforward standard to follow.
| | 3 | No.3 Revision |
In ASHRAE 90.1-2007 (and 2010 and 2013 and probably 2016, too) Appendix G, the baseline thermal blocks should be the same as the Propose Design. Proposed Design model. See Table G3.1 No. 7 and 8. Nothing in the Performance Rating Method requires (or even allows) the model zoning to be different.
The 'system per floor' requirement for baseline systems 5, 6, 7 and 8 simply means that all the thermal blocks (except the ones that meet the G3.1.1 exceptions) on the same floor are conditioned by a single baseline system. I do not know the exact reason why this requirement exists, but would guess that since those systems are multi-zone, ASHRAE has to set some standards for which zones are served by which system, and 'per floor' is a pretty straightforward standard to follow.
