Your client asks for the certificate. We prepare working documentation and an XML sample from the data supplied.
The competent technician reviews, calculates, signs and processes the final certificate.
The problem
The certifying technician must focus on inspection, calculation and professional responsibility.
We help organize repetitive documentation without replacing their judgement.
Taking field data, organizing photos, drawing sketches and cataloging rooms can require additional work before calculation.
Entering each building enclosure, each opening, each installation. Verifying thermal transmittances, surface areas, orientations. Mechanical, repetitive work.
Laying out the PDF, inserting photos, completing tables and drafting recommendations requires consistency and traceability.
The certificate and final XML must follow the current procedure and be submitted to the competent authority by an authorized party.
The solution
You send us the field data and we prepare working documentation: a draft report, structured data, an XML sample and a photographic record according to the agreed scope.
Photos of the property, measurements or sketches, and an audio or text describing the project. What you already do during the visit.
→On the agreed schedule you receive the draft report, technical data, XML sample, photographic record and checklist included in the proposal.
→As the competent technician, you check the data and assumptions, calculate using a compatible recognized procedure, generate and sign the final certificate and coordinate its registration.
What's included
Technical sample
A technical sample prepared by Eficiencial Studio using a reference single-family home. It is not a client commission, an issued certificate or a registered file. Download the files to evaluate the format.
Key differentiator
We prepare an XML template with the available data. Its structure, version and possible use must be checked against the applicable official schema, the selected recognized tool and registry requirements before the final XML is generated.
Technical example, not a certificate or a compatibility guarantee. The declared version must be checked in the official CTE XML Viewer and current documentation before use.
The sample illustrates working fields such as DatosDelCertificador, IdentificacionEdificio, DatosGeneralesyGeometria, DatosEnvolventeTermica, InstalacionesTermicas, Calificacion and MedidasDeMejora. The presence of a field does not mean it is complete or validated.
CE3X and CE3 are listed among tools promoted for existing buildings, and CERMA among recognized tools for residential buildings. This sample’s compatibility must be checked for the current tool, version and schema in the CTE XML Viewer.
Why us
Workflow
You visit the property. You send us photos, measurements, and a description by audio or text.
On the agreed schedule you receive the drafts and working files included in the proposal.
As the competent technician, you check data and assumptions, select the recognized procedure and version, calculate and generate the final certificate and XML.
You sign the certificate, and the developer, owner or authorized party submits the documentation to the competent authority under its requirements.
Start now
Send us the data for your next project. After reviewing it, we will propose scope, deliverables, revisions, price and schedule. The service is documentation support and does not replace the competent technician.
Or write to us directly: studio@eficiencial.com · +34 674 786 386
CE3X guide
CE3X is listed in MITECO’s official recognized-documents directory among the simplified procedures promoted for energy certification of existing buildings. XML is part of the certification documentation; our sample helps structure data but does not replace the calculation or the final file generated and reviewed by the competent technician.
The usual certification process is laborious: the technician visits the property, takes data on the thermal envelope (walls, roofs, floors, openings), thermal installations (heating, cooling, DHW), and the building's geometric conditions. Then, they manually input each data point into CE3X: each building enclosure with its thermal transmittance, each opening with its solar factor, each installation with its performance.
Our pre-filled sample organizes common XML report fields. Before using it, the technician must confirm the applicable schema and version, check whether the selected recognized procedure supports that workflow, review all values and assumptions, perform the calculation and generate the final files.
According to MITECO’s official information on Royal Decree 390/2021, the certificate must be signed by a competent technician and, for registration, the developer, owner or authorized party submits the certificate and XML report to the regional authority. In the Canary Islands, procedure 3137 requires prior accreditation as a competent technician. The CTE XML Viewer supports checking the file, but that check does not replace professional review or by itself guarantee registry acceptance.