While there's not much that can be done to existing buildings, certification processes for new buildings are changing. (ibp.fraunhofer.de)
Once the residency is completed the board certification process begins first with a credentials package consisting of publications, case reports, and resume. (eyecareforanimals.com)
As for third - party devices that work with Nest, all of them are required to go through a rigorous certification process prior to any official integration. (cnet.com)