Continuous exterior insulation INCREASES energy use?

asked 2019-06-04 13:12:50 -0500

et's avatar

Running my model (~4000SF, 1 story home, Climate Zone 5A , ~6000HDD) through BEOpt, using 16" dense pack celluolose celing, insulated slab with perimeter insulation, I get higher energy use if I add continuous R-6 Polyiso exterior insulation to my 2x6 framed walls. Is this a bug? Could this be due to reduced energy gain in the winter? Is there a possiblity of continuous rigid exterior insulation INCREASING energy use?

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What end use is increasing - cooling?

mdahlhausen's avatar mdahlhausen  ( 2019-06-04 13:46:55 -0500 )edit

Sorry, I got lost in my model, I have to double check...

et's avatar et  ( 2019-06-05 09:05:41 -0500 )edit