Plan energy efficiency — build with subsidies.
Engineering-grade energy consulting by Dipl.-Ing. Rolf Krause (KfW EB473095): 50+ building-physics calculators, renovation roadmaps, KfW/BAFA subsidy guidance and the Digital Building Passport — one shared data backbone for every tool.
Free Building Check → Digital Building PassportEverything your building project needs
All tools share one project store — enter your building once, use it everywhere.
🧱 Building Physics
U-values with Glaser moisture analysis, heating & cooling loads (DIN EN 12831), heat pump sizing, ventilation, summer heat protection and hygrothermal FEM.
All calculators →💶 Economics & Subsidies
DIN-276 construction costs, KfW/BAFA subsidy calculators with the current BEG reform, financing and affordability checks, market valuation.
Economics tools →📋 Verifications & Reports
GEG thermal protection verification, reference building, renovation roadmap (iSFP), CAD floor plans with DIN-18599 zoning and PDF reports.
Services →🗂 Data Hub
Import IFC models, BKI projects or scanned plans, manage project versions and share your data through controlled channels.
Open the Data Hub →The Digital Building Passport
A lifelong identity for your building: energy data, documents, maintenance and renovation history in one place — with the explainable Building Trust Index, role-based access for banks and agents, a PIN-protected public report, printable pass cards and cryptographically signed data. Fully bilingual.
Open the passport →
Consulting throughout Germany — digital & personal
Ginsterweg 2a, 41379 Brüggen · beratung@rolfkrause.com · +49 176 2287 2775
Get in touch →