The ZEPHREN application family
Each application does one job and has its own address. Pick the one you need.
Calculation software for energy performance certificates (RO)
Certificate and annexes under Mc 001-2022, energy audit and nZEB.
VerificAI (RO)
Assistant that drafts verification reports on seven of the eight fundamental requirements in Law 169/2026 (art. 386 para. (3) lit. a–g).
U-value calculator (RO)
Thermal transmittance U of a wall, roof or floor.
Glaser condensation calculator
Surface or interstitial condensation, on the layers you pick.
Estimated energy class
Indicative class of a building from its primary energy, on the Mc 001-2022 scale.
Thermal bridges: f_Rsi
The f_Rsi factor of an element and the yearly loss through a linear bridge.
Guides (RO)
The legal framework of energy certification, with official sources and the date they were checked.
Calculation examples (RO)
Five reference buildings, calculated in public.
Directory of auditors (RO)
Certified energy auditors, by county.
Working on an energy performance certificate or a design verification?
The ZEPHREN calculation software follows Mc 001-2022; VerificAI is the assistant for design verifiers. Both come with a free trial, no card needed.