Change the material,
watch the carbon change.
Bimmatch estimates your project's A1–A3 emissions straight from the materials in the published model — then lets you source an alternative and see the total move, while changing a specification still costs nothing. Every figure is backed by a quantified Bill of Materials you can open, export and turn into an RFQ.
CO₂e ESTIMATION A1–A3
MEP Demo project · Publish Vr. 2
One swap, then the receipts
Six steps of one session, on loop. Hover to pause, or use the steps below to jump.
MEP Demo project
SOURCE A DIFFERENT MATERIAL
The demo is a faithful recreation of the live panels, rendered in HTML/CSS so it stays sharp at any size and shows sample figures rather than a live project's numbers.
Three steps, none of them manual
A1–A3 is cradle-to-gate: emissions embodied in producing the materials, before transport to site, construction, use or end of life. It is an estimation to steer design decisions, not a certified assessment.
The lever, not the report
Carbon totals are easy to produce and hard to act on. What makes this useful is that the material list is editable and the total is live.
Find the line that matters
Embodied carbon is usually concentrated in two or three materials. The breakdown puts them at the top, so there's no hunting.
Source an alternative
Pick a different material for that line. The quantity stays — the geometry hasn't changed — and the emission factor updates.
Keep it or throw it away
The project total moves immediately. Reset all changes puts everything back to the modelled materials, so exploring an option costs nothing.
ONE MATERIAL CHANGED
Before
418,200
After
342,900
Concrete, Cast In-Situ (CEM I) → a low-clinker mix. Same 1,820 m³, same design, one line in the specification.
74%
of the project has CO2e data behind it
A total is meaningless without its coverage
The panel reports a second number next to the first: how much of the project the estimate actually covers. It is there on purpose.
A carbon figure that quietly excludes a third of the model is worse than no figure, because someone will act on it. Showing completeness turns the estimate into something a client can interrogate and a team can improve — and it makes the next task obvious: raise the coverage, then trust the number.
The same data, itemized
Switch the viewer from 3D to BOM and the project becomes a quantified Bill of Materials — category by category, type by type, size by size. The chart summarizes it; this is what it summarizes.
| Category / type / size | Quantity | Volume m³ | Materials | kg CO2e |
|---|---|---|---|---|
| Pipe Fittings | 578 | 6.04 | 3 | 52,140 |
| pipe cap | 26 | 0.42 | 1 | 1,180 |
| Ø32" | 4 | 0.08 | 1 | 218 |
| Ø36" | 2 | 0.05 | 1 | 141 |
| Ø28" | 10 | 0.16 | 1 | 452 |
| R=1.5D sigmental elbow | 278 | 3.90 | 2 | 24,860 |
| T Tee | 44 | 0.91 | 2 | 5,720 |
| Pipe Accessories | 555 | 2.18 | 4 | 19,430 |
| Windows | 4 | — | 2 | 1,240 |
Where the bill of materials goes next
What changes on the project
Carbon as a design lever
Most tools tell you what a finished design emits. This one is attached to a live material list, so the next action is one click away — while it's still free to change.
No separate carbon model
Quantities come from the published BIM model. Nothing is re-entered, nothing is estimated by hand, and the number updates when the model does.
Honest by construction
The total is reported next to how much of the project it covers — the difference between a number a client can challenge and one they can rely on.
Chart and table are the same data
Anyone who doubts the figure opens the BOM and follows it to the row, instead of arguing about a black box.
Scoped to the decision
Whole project for a submission, one category for a design review, one family for a procurement question. The panel follows the context.
A bill of materials nobody counted
Even setting carbon aside, the BOM earns the tab: every category, type and size with quantities, exportable to Excel, produced from the model.
From quantity to quote
RFQs generated from real quantities, with carbon visible beside them — the only way a lower-carbon alternative actually gets bought.
One tab, several teams
What this is, and what it isn't
See it on your own model
Bring a published model. We'll show you its A1–A3 total, the heaviest material, and what one substitution does to it — in the same meeting.
Book a demo[email protected]