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Constr. ICF ICF ICF ICF ICF Conv Conv
Location Coppell Flower Mound Richardson Richardson Coppell Richardson Richardson
Orientation East West North North West North North
Model Linden Ellesmere Canterbury II Gettysburg II Ravenwood Canterbury II Gettysburg II
Plan No. VC 3070 FM 1823 E 2051 E 50 VC 2625 E 2051 E 50
Square Feet 3,567 1,823 3,768 2,844 3,026 3,768 2,844
No. of Stories 2 1 2 2 2 2 2
% Glass/Floor Area 16% 16% 18% 23% 13% 18% 23%
Envelope and Ducts
CFM50 2,458 1590 3,570 3,864 2,110 3,168 2,402
CFM50/sq. ft. 0.69 0.87 0.95 1.36 0.7 0.84 0.84
ACH50 4.1 5.8 5.7 8.2 4.3 5 5.1
Ducts
CFM25 Total 488 192 484 505 400 506 674
% of Floor Area 13.70% 10.50% 12.80% 17.80% 13.20% 13.40% 23.70%
CFM25 to Out 185 142 250 206 273 353 385
% of Floor Area 5.20% 7.80% 6.60% 7.20% 9.00% 9.40% 13.50%
Solar Board Y Y North Y Y Y Y
Can Lights to Attic ? ? 4 0 12 7 0
Construction Stage Finished Unoccupied Finished Unoccupied Unfinished Floors Unfinished Floors + Big Holes Finished Unoccupied Occupied Occupied
Notes         Concrete Concept Homes    
HERS Score (As Is - W/ Gas Heat/Heat Pump 87.3/87.6 86.0/86.3 87.2/87.5 85.4/85.8 86.7/NA 85.8/86.2 84.1/84.6

Table 3. Measured Envelope and Duct Airtightness and Ratings of Seven Centex Homes in Dallas, TX

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