CO2 reduction



In existing buildings, we look for reductions in energy use and apply the profits to invest in renewable energy and CO2-compensation. In many cases, operating a building can be CO2-neutral, without extra cost. The ultimate sustainable building is fully recyclable, energy positive, flexible and comfortable.


We measure and calculate

By calculating the direct (‘scope 1’) and indirect (‘scope 2 and 3’) emissions, we give you an overview of the climate impact of your buildings.

We reduce and minimise

We audit your buildings and perform feasibility studies, but we will also challenge you to define a long standing energy strategy. Factor4 will implement the strategy and verify the result.

We communicate and report

We help you to report using official standards: GRI (Global Reporting Initiative), EPRA sustainability (European Public Real Estate Association), GRESB (Global Real Estate Sustainability Benchmark), CO2-prestatieladder, BREEAM and others.

Factor4 is CO2 neutral. We limit our impact by taking public transport and bikes, avoiding paper use and efficiently utilizing office space.
We help our customers do the same. Quite often, the energy savings profit is sufficient to compensate the remaining CO2 emissions.

Kristof Descheemaeker


Practice what you preach

Factor4 is a CO2 Neutral company. We limit our emissions and offset what we can’t avoid.

Relevant services


We are accredited and licensed to perform energy audits, report on CO2 footprints and we can help you offset your CO2 emissions. Read more

Design and optimisation

We design and develop energy-related components: from conceptual design over detailed drawings to procurement documents. We take on new designs and optimize existing installations. Read more

Measuring performance

We measure building performance using different tools, from sensors over audits to comfort surveys. Read more

Our clients

Office in Belgium
Lange Winkelhaakstraat 26
B-2060 Antwerp
T +32 3 225 23 12
Find out here how to reach us and where to park.
You can leave your bike in a locked area in the building.

VAT 0884 068 589
IBAN: BE38 7380 3377 0772
RPR: Mechelen
Terms and conditions

Contact us