I am attempting to establish a few alternatives compared to an ASHRAE 90.1 Wall construction. This much seems pretty straightforward with the only change between alternatives being a different construction applied to the exterior above grade walls. All alternatives are modeled as delayed and with layered materials. The wall from outside to inside is stucco(finish) R0.08 + Cont. Insulation R-VARIES + Ext sheathing R0.56 + Framing/Insulation R-VARIES* + Int. Sheating R0.56 (air films do not change, infiltration does not change, etc.)<br>
<br>*framing 16" Mtl OC taken into account<br><br><<< I should mention the building is very much internal load dominant as an education building with a lot of laboratory space >>><br><br><div>The problem described below has been input into eQuest using material properties for all continuous insulation and a representative R-value for framing/insulation.<br>
</div><div><br></div><br>BASELINE - 90.1 - R6* + 7.5 ci na<br><br>ALT1 - only ext insulation R0.9 + 12 ci -8% savings (% energy under EUI - kBtu/sf/yr) <br>
<br>ALT2 - improved ext insulation R6* + 12 ci +1% savings<br><br>ALT3 - improved cavity insulation R7.1* + 7.5 ci +1% savings<br><br>ALT4 - all insulation improved R7.1* + 12 ci +2% savings<br>
<div><br></div><div>I guess the question really is; does the issue lie within the vav systems or the envelope or both?<br></div><div><br></div>As a novice, I greatly appreciate any help.<br>