Energy and technical documentation · Spain
Termavia assembles a building's profile from public registers in minutes and prepares the mandatory energy and technical documents. The accredited technician visits once, verifies and signs
of mandatory fields filled automatically
| Parameter | Value | Source | Confidence |
|---|---|---|---|
| Year of construction | 1971 | Register | High |
| Dwellings | 24 | Register | High |
| Useful floor area | 1,842 m² | Typology | Medium |
| Façade orientation | NE / SW | Ortho | High |
| Roof area and pitch | 312 m², flat | Ortho | Medium |
| Glazing | Single, metal | Typology | Low |
| Climate zone | C2 | Register | High |
| Current certificate | Class F, 2019 | Register | High |
Where the hours go
A mandatory document for a residential building takes an accredited specialist 3 to 22 hours. Around seven tenths of that time goes on collecting data the state has already published, cross-checking it and typing it into calculation software
Labour input per document for residential buildings in Spain. The site visit stays, as the law requires
mandatory documents a year for residential buildings in Spain
of working time in the industry is desk work
a year of desk work that creates no engineering value
Worked example
A 1971 block with 24 flats and a central boiler room in the Eixample, Barcelona. Four moments from the first query to the measured result
from the cadastral reference to a complete property record
lead time from 2–5 weeks down to one
kWh per m² a year, normative calculation against the calibrated model
01 · Days 1–2
The administrator enters the cadastral reference. Four minutes later the record is on screen: geometry, floor areas, façade orientation, roof area and pitch, a class F certificate from 2019, climate zone C2 and the construction inferred from the typology of 1970s block development on the Catalan coast
02 · Days 3–5
The technician arrives knowing what the registers could not confirm: the condition of the roof, insulation of the basement slab, the glazing type and the shared boiler plant. The document goes for signature and registration, and the lead time falls from two to five weeks to one
03 · Weeks 3–8
With one resolution of the general meeting the community shares 24 months of boiler gas data and the electricity of the common supply point. Eight of the 24 flats authorise their own meters, which reveals the summer cooling. The normative calculation gave 168 kWh per square metre a year, the calibrated model gives 141
04 · 18 months after the works
Savings of 27% were forecast within an interval of 22 to 32%. The measured result is 25%. The forecast held, the deferred part of the fee is paid, and the building joins the property database together with its result
Illustrative scenario for a building with a central boiler room. For buildings with individual systems the sequence is the same, with authorisations collected from a sample of flats and a wider confidence interval
Calibration
Normative methods assume 20 degrees in winter and ventilation on a schedule. Termavia fits the building model to its real hourly consumption and the real weather of the same period, so the savings forecast can be verified after the works
Hover or tap the chart to read monthly values. Annual totals in kWh per m² a year
divergence of the normative calculation from fact in this building
fit accuracy of the calibrated model against the measured curve
share of cooling in the heating and cooling load in the coastal zones B3, B4 and C2, which northern methods underestimate
Accountability
For the forecasting part of a document, 70 to 80% of the agreed price is paid on delivery. The remaining 20 to 30% waits until the result after the works has been measured. We publish how accurate our forecasts turn out to be
of properties with the result inside the stated interval
mean absolute error of the savings forecast
systematic bias of the forecast against fact
properties with a full year of observation after the works
Accuracy targets we report against
Forecast for the example building: 27% savings, interval 22–32%
Measured savings are inside 22–32%, so the deferred part of the fee is paid
Who it is for
Practices produce the documents, administrators manage the deadlines, institutional holders plan the works. Each sees the same property record from its own side
Technical practices and accredited technicians
The desk part of each document shrinks to confirmation and judgement, so the practice's limit moves from office hours to the visit calendar
Typical practice, two technicians, documents a month
At a coefficient of 2.0 in the first year, against a theoretical ceiling of 110 documents a month (dashed line)
Property administrators
See where documentation has gone out of date, which deadlines are coming and where to start, across dozens of buildings at once
Example portfolio, 248 properties, by energy class
176 properties in classes E–G · 71% of the portfolioInstitutional holders of housing
Municipal housing companies, social operators and rental funds get forecasts with a stated confidence interval and the verified result after the works
Built for Spanish regulation
Termavia works before the calculation and after it. The official methodology, the recognised procedures and the professional's signature stay exactly where the law puts them
Registered indicators are computed by a procedure from the state register: HULC, CE3, CE3X, CERMA, CYPETHERM HE Plus, SG SAVE or TeKton3D TK‑CEEP
The generator is built for the certificate format in force since 30 September 2026 and validates every export against the XSD schema
Before a document goes for signature, the technician's status is checked against the centralised register of certifying technicians
An accredited technician visits the property, confirms the disputed fields and signs, with a full record of where every value came from
Hourly consumption is used only with the explicit authorisation of the supply point holder. Identifying and analytical data are stored apart
A European cloud with the region in Spain. Products built on the property database use fully anonymised data
Questions
Anything else, write to us at hello@termavia-group.com
The platform collects the data, runs the calculation through a recognised procedure and prepares the draft. The accredited technician visits the property, verifies the document, signs it and remains responsible for it, as the law requires
Energy performance certificates for dwellings and whole buildings, existing building books, building evaluation reports and renovation passports. In Catalonia the technical inspection data set is passed to the regional telematic instrument of the Housing Agency
Cadastral data covers the whole of Spain except Navarre and the Basque Country. Regional certificate registers are connected one community at a time: Catalonia first, then Valencia, Madrid and Andalusia
Only with the authorisation of the supply point holder through DATADIS. In a building with a central boiler room one resolution of the general meeting is enough. With individual systems we work on a sample of at least 30% of dwellings and no fewer than eight flats, and the confidence interval is widened accordingly
You keep the recognised procedure you use today. A small local module installed alongside it on the technician's computer receives the prepared project file and returns the result with the XML export, without any change to the tool itself
Each source has its own connector and a cache of responses. If one register does not answer, the affected fields move to manual entry and the document stays workable
Contact
Tell us about your practice or portfolio and add a cadastral reference you have in mind. We prepare the walkthrough on that property and reply within two working days
Your request is with us. We will reply within two working days
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Access to the platform is granted under a separate agreement. Documents prepared with the platform are verified and signed by an accredited technician, who remains responsible for their content
Figures on this website describe typical cases and illustrative examples. They are not a professional opinion on any specific property
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