Descarboniza · workspaceBeta

Vega, el espacio de trabajo de Descarboniza

The tools we use to prepare a project: the envelope, the Spanish energy code, carbon and radon. All in one place, all with the standard in plain sight.

See the laboratory

What you see when a calculation finishes

The label, the verdict and the change you are missing.

Vega does not stop at “fails”: it says why, proposes the change and applies it in one click. Then it recalculates until it passes or nothing is left to propose.

Energy ratingofficial scale · not registrable

Zone D3 · mainland

This home would get a B in emissions and a B in consumption.

A< 4,1

B< 7,9

BkgCO₂/m²·año

C< 13,2

D< 21,2

E< 45,1

F< 54,3

G≥ F

CO₂ emissions

kgCO₂/m²·año

2.8 kgCO₂/m²·año away from A.

B

Non-renewable primary energy

kWh/m²·año

13.0 kWh/m²·año away from A.

B

Heating demand

kWh/m²·año

C

Cooling demand

kWh/m²·año

B

Sample data. The scale is the official one for homes; the indicators come from EnergyPlus with the CTE climate.

Recognised document «Calificación de la eficiencia energética de los edificios» (v1.1, Nov 2015), Annex IV, single-family home — the same scale CE3X applies.

Spanish energy-code sections checked
climate zones with the official CTE weather: −%
versus HULC on combined demand
materials with GWP from verified EPDs

How it works

From the IFC to the report, without typing the building again.

1
Upload the IFC
Walls, roofs, floors and openings come from the model.
2
Vega locates the building
Cadastre, official weather and code scope before anything is calculated.
3
Asks only what is missing
Just the data the IFC does not carry, each with its provenance.
4
Calculates with EnergyPlus
CTE weather, hourly results, five sections of the energy code.
5
Takes you to compliance
Label, verdict and proposals applied in one click. Report and CEX at the end.

Vega is where we work. Each tool does one concrete thing and says where its data comes from: which standard applies, which engine calculates, and which EPD every kilo of carbon came from. No figure appears that you cannot trace back to its source document.

And it is worth saying early what Vega is not: it does not replace the officially approved software. It does the work that comes before — pre-sizing, preparing the data, and reaching the official justification already knowing what it will say.

Vega is in beta. It works and it keeps growing — if something breaks, we want to hear about it.

Applications

The apps require an account to save and reopen projects. Analysis and on-screen results are free; Vega technical documents require an active plan.

AppFreeHE + CarbonUpload the IFC once: Vega locates the building via Catastro, asks only what is missing, computes HE0 to HE6 and carbon, proposes how to comply and gives you the report.Project · IFC · EnergyPlus · PDF · CEX AppAccountThermosU-values for walls, floors, partitions and windows, with the CTE HE1 check alongside.UNE-EN 673 · ISO 10077-1 AppAccountComparatorConstruction systems compared by carbon footprint, backed by verified EPDs.EPD · EN 15804 AppAccountRadonSpain's DB-HS 6 by municipality: zone, required measures and a downloadable compliance document.CTE DB-HS 6 · Appendix B AppAccountÁbregoYour municipality's official climate, read in full: which passive strategies cover each hour of the year, how the sun comes in, where the wind blows from, how much daylight there is — and the written bioclimatic study, to edit and share; as PDF or Word, €19.90.Givoni 1992 · CTE climate · dossier AccountFreeMy systemsYour library: everything you save from the applications, ready to reopen.Your library

Laboratory

What we test in the open. All five pieces open without an account.

LabPublicThe breathing façadeThe stack effect of a ventilated façade, simulated in 3D.WebGL · stack effect LabPublicThe carbon roseForty materials from sink to emitter, in a live radial.40 materials · GWP LabPublicThe building-site roseA building's A1–A5 carbon, chapter by chapter — and who decides each kilo.A1–A5 · by chapter LabPublicRammed earthThe earthen wall against the Spanish code: U-value, thermal lag and compliance.CTE HE1 · thermal lag LabPublicThe Extremadura borderThe carbon of 388 municipalities on both sides of the border, on the map.388 municipalities · Cadastre LabPublicThe mapExtremadura building by building, in 3D, coloured by the insulation regulation in force when each one was built. Click a building to open its X-ray.Cadastre · NBE-CT-79 · CTE LabPublicExtremadura 2030The building stock of Badajoz and Cáceres building by building, with the regional register of energy certificates matched by plot and the technician's path to the compliance report. The piece for the 2026–2030 Housing Plan.Cadastre · EPC register · 2026–2030 Plan

Upload an IFC and see what comes out.

Free, unlimited, no card. All you need is an account.