PC 54 is the new PC11?

Hi Susan - There is quite a bit of overlap between PC11 and PC54, but we're leaving both open for the moment. By doing this, we can compare the results of each credit and see which approach works best as a credit. As for differences, the scope of materials covered by PC54 is larger than PC11, but PC11 includes some phthalates that PC54 does not. If you're currently registered for PC11 and would like to pursue PC54 instead, you can re-register, or email pilot@usgbc.org to have your registration transferred, but you're by no means required to switch over if you feel PC11 is a better fit for your project.