A Meta-Analysis of Single-Family Deep Energy Retrofit Performance in the U.S.

Technical Report · Fri Aug 01 04:00:00 EDT 2014

DOI:https://doi.org/10.2172/1220537· OSTI ID:1220537

Less, Brennan ^[1]; Walker, Iain ^[1]

---

1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

The current state of Deep Energy Retrofit (DER) performance in the U.S. has been assessed in 116 homes in the United States, using actual and simulated data gathered from the available domestic literature. Substantial airtightness reductions averaging 63% (n=48) were reported (two- to three-times more than in conventional retrofits), with average post-retrofit airtightness of 4.7 Air Changes per House at 50 Pascal (ACH50) (n=94). Yet, mechanical ventilation was not installed consistently. In order to avoid indoor air quality (IAQ) issues, all future DERs should comply with ASHRAE 62.2-2013 requirements or equivalent. Projects generally achieved good energy results, with average annual net-site and net-source energy savings of 47%±20% and 45%±24% (n=57 and n=35), respectively, and carbon emission reductions of 47%±22% (n=23). Net-energy reductions did not vary reliably with house age, airtightness, or reported project costs, but pre-retrofit energy usage was correlated with total reductions (MMBtu).

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B)
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1220537
• Report Number(s): LBNL--6601; 7157
• Country of Publication: United States
• Language: English

Related Subjects

lbnl
deep energy retrofit