Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
If you are looking for the efficiency level and air flow rates that make sense for a building that age you might want to take a look at reference buildings that NREL has modeled for pre-1980. The models are for reference buildings but the assumptions made in them might help you figure out the assumptions for both questions. My instinct is that a window A/C unit from that era has a 6 EER to 8 EER for efficiency when new. With the amount of maintenance that window A/C unit usually get, the efficiency probably has dropped significantly since the units were new.
