Modeled air sealing in zone 3. Energy use increased
What am I doing wrong. I was having a discussion with someone that in my zone 3a air sealing doesn’t save much money.
So,using energy plus via beopt, I modeled a below code minimum house- Dallas tx, 1800sf, 7ach50 , no ventilation, and then the exact same house but with passive house tightness of 0.6ach and a 70% erv, no dehumidifier – total energy use actually increased with the air sealed house and it showed higher humidity in the summer.
Could this be possible?
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