From BC3
This dataset was developed by the National Association of Home Builders (NAHB) Research Center for ASHRAE in 2009. More detailed information is available on the ASHRAE website.
ASHRAE 90.2. 2009. Economic Database in Support of ASHRAE 90.2 (Energy-Efficient Design of Low-Rise Residential Buildings) 1481 RP. Prepared by the NAHB Research Center, #3296_051409.

