Case Study of Envelope Sealing in Existing Multiunit Structures

Dentz, J. ; Conlin, F. ; Podorson, D.

关键词: ENVELOPE LEAKAGE;    MULTIFAMILY;    AFFORDABLE HOUSING;    BLOWER DOOR TEST;    SHELL LEAKAGE;    ENCLOSURE LEAKAGE;    AIR TIGHTNESS;    AIR SEALING;    RESIDENTIAL;    RESIDENTIAL BUILDING;    ARIES;    BUILDING AMERICA;    Electricity;    Resources;    and Buildings Systems;    Buildings;   

DOI  :  10.2172/1053748
RP-ID  :  DOE/GO-102012-3583
PID  :  OSTI ID: 1053748
Others  :  Other: KNDJ-0-40347-00

学科分类：能源（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Envelope air sealing was included in the retrofit of a 244 unit low-rise multifamily housing complex in Durham, N.C. Pre- and post-retrofit enclosure leakage tests were conducted on 51 units and detailed diagnostics were performed on 16. On average, total leakage was reduced by nearly half, from 19.7 ACH50 to 9.4 ACH50. Costs for air sealing were $0.31 per square foot of conditioned floor area, lower than estimates found in the National Residential Efficiency Measures Database (NREMD) and other sources, perhaps due in part to the large-scale production nature of the project. Modeling with BEopt software -- using an estimate of 85% of the envelope air leakage going to the outside (based on guarded tests performed at the site) -- calculated a space conditioning energy cost savings of 15% to 21% due to the air sealing retrofit. Important air leakage locations identified included plumbing and electrical penetrations, dropped ceilings/soffits, windows, ducts and wall-to-floor intersections. Previous repair activity had created significant leakage locations as well. Specifications and a pictorial guide were developed for contractors performing the work.