TheLEED for Homes Rating System (v4)awards points for theMaterials and Resources (MR) Credit: Environmentally Preferable Products, Option 1: Local Production, which encourages the use of materials sourced locally to reduce transportation impacts.

According to theLEED Reference Guide for Homes Design and Construction (v4):

MR Credit: Environmentally Preferable Products, Option 1: Local Production (1–4 points)

Use products that have been extracted, harvested, or recovered, as well as manufactured, within 100 miles (160 km) of the project site for at least 25%, 50%, or 90% (by cost) of the total materials.

Source: LEED Reference Guide for Homes Design and Construction, v4, Materials and Resources Credit: Environmentally Preferable Products, p. 160.

TheLEED v4.1 Residential BD+Crating system confirms:

MR Credit: Environmentally Preferable Products, Option 1: Local Production

Materials must be extracted, harvested, or recovered and manufactured within 100 miles (160 km) of the project site to qualify for local production points.

Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.

Evaluation of options:

A. Granite slabs extracted in China and manufactured and installed in New York City: Extracted in China, far exceeding the 100-mile (160 km) limit, so it does not qualify.

B. Wood studs harvested and manufactured in Western Canada and installed in California within a 750 mi. (1,200 km) radius: The 750-mile radius exceeds the 100-mile limit, so it does not qualify.

C. Wood studs harvested and manufactured in Mexico within a 98 mi. (158 km) radius of the final installation in New Mexico: Both harvesting and manufacturing are within 100 miles (160 km), meeting the local production criteria.

D. Wooden doors manufactured in Oshkosh, Wisconsin, assembled 1,463 mi. (2,354 km) away in Provo, Utah, and installed 1,246 mi. (2,005 km) away in Austin, Texas: The distances for manufacturing and assembly far exceed the 100-mile limit, so it does not qualify.

The correct answer isOption C, as the wood studs meet the local production requirement of being harvested and manufactured within 100 miles (160 km) of the project site.

TheLEED AP Homes Candidate Handbookemphasizes MR credits, including Environmentally Preferable Products, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of the 100-mile radius.