A45
For advisors

A4-A5 documentation in a fraction of the time

Collect data from contractors and subcontractors in one platform. Review, verify, and generate BR18 reports — while you focus on the big climate optimizations in A1-A3.

BR18-verified · Table 8, 10, 11

app.a45.dk/project/review
BIDRAGSYDERE
MH
JK
LS
AP
A4.2

Beton C30/37 — Roskilde

MH

1,84
A4.3

Stål HEB200

JK

0,42
A5.1

Diesel — Liebherr LTM

LS

3,21
TOTAL A4+A50,73 kg CO₂e/m²/år
Sound familiar?

The challenges you know

01

No visibility along the way

You don't know where the calculation stands right now — and can't intervene in time if the project is heading towards an exceedance.

02

Data from every direction

Many different parties need to deliver data — but they rarely know exactly what to submit. You end up collecting from emails, PDFs, and different systems.

03

Stuck in spreadsheets

Hours go into maintaining Excel sheets, copying numbers between tabs, and double-checking formulas — without ever having one unified overview.

How it works

Coordinate, review, document

01

Create project and invite

Create a project and invite contractors to contribute data. Assign roles and set expectations.

02

Contractors add data

Contractors add emissions — the platform guides them through the right fields and calculation methods.

03

Review and verify

Review and verify data — edit, switch methods, or add manually. You have full control over everything.

04

Generate BR18 report

Generate BR18 report with full method tracing and contributor overview. Ready for submission.

AI-assisted invoice scanning is available, but you can always review and correct everything manually.

BR18 methods

All BR18 methods. One place.

Mix methods freely — measured consumption for transport, standard values for terminal processes, EPD for waste.

A4 — Transport

Measured fuel

Calculation based on actual fuel consumption using BR18 Table 8.2 emission factors.

Distance-based

Calculation via transport distance and cargo weight (ton·km) with vehicle-specific factors.

Standard values

BR18 Table 10.1 standard values per material. Incl. +0.04 surcharge for terminal processes and packaging.

EPD data

Product-specific Environmental Product Declarations (EPD) per EN 15804 standard.

A5 — Construction site

Equipment >1T

Energy consumption from machinery and equipment over 1 ton on the construction site.

Facilities

Electricity, heating, and fuel for site offices, lighting, and temporary installations.

Waste handling

BR18 Table 11 emission factors for 15 waste fractions — or your own EPD-based climate data.

Collaboration

All project parties, unified — you have the overview

Contractors and subcontractors add data. You review and approve. Full traceability of who contributed what.

Building owner
Advisor
← DU
Contractor
Subcontractor
Data flows up — you review at the top

Role-based access

Assign roles and customize who can view, add, and edit data.

Full traceability

See who added what, when, and with which method.

Review and approval

Review contractors' data and switch methods or correct before approval.

FAQ

Frequently asked questions

Create one project and invite contractors to contribute directly. Each party adds their own emissions — transport, energy, and waste — while you maintain full visibility and can review, adjust, and approve before the report is generated.

Yes. You can review all entries, remove incorrect ones, and add corrected data — as well as switch calculation methods. Everything is logged with full traceability, so you always know who contributed what.

All four A4 methods: measured fuel consumption (Table 8.2), distance-based ton-km, standard values (Table 10.1), and EPD data (EN 15804). Plus A5 for machinery over 1 ton, facility energy, and waste handling with 15 fractions from Table 11 or EPD data.

Click 'Export Report' in the project overview. The report includes A4/A5 breakdown, method-specific tables, contributor overview, and compliance status — ready to attach to the completion notice.

No. The platform guides them step by step and automatically suggests the right calculation method. They just need to upload invoices or enter basic data like distance, weight, and fuel — A45 handles the rest.

Most advisors spend 1-2 weeks per project on manual A4-A5 coordination — collecting data, entering it into spreadsheets, checking for errors, and formatting reports. With A45, this is reduced to hours because data flows directly from contractors to report.

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See how A45 can simplify your A4-A5 coordination. No credit card required.

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