PHIUS+ Certification for Building Projects is the only voluntary certification program on the US Market at an affordable cost that requires both: a thorough third party review of the design and energy/hygrothermal modeling of a project as well as a third party verification of the actual implementation on site through expert trained PHIUS+ RESNET Raters. A successful project earns the PHIUS+ Certified passive house or building plaque/certificate as well as the DOE Challenge Home and Energy Star labels.

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