ecalcsplus03 – https://ecalcsplus.com/blower-door-testing/

E-Calcs Plus is a Florida-based energy consulting firm specializing in Manual J, D, S calculations, blower door, and duct leakage testing for residential buildings. They are RESNET-certified HERS raters known for fast turnaround and permit-ready documents. The company works closely with builders and designers to support energy-efficient home designs.