Green Friday – Houzy plants trees for the climate

Optimise the energy efficiency of your property

Check the savings potential, investment costs and subsidies of an energy-efficient renovation simply and free of charge. In return, we will plant a tree to thank you.

Check energy efficiency

Compare the costs and sustainability of heating systems

Compare the costs, service life and CO2 emissions of heat pumps, natural gas and other heating systems and find the right heating system for your energy consumption. In return, we will plant a tree to thank you.

Compare heating systems

Solar potential and costs at a glance

Check the solar potential of your property free of charge and simulate your own consumption. In return, we will plant a tree to thank you.

Check solar potential

Our Partners

What are we doing?

Many shops, shops and online shops offer big discounts on Black Friday and will generate more sales on 24 November 2023 than on any other day of the year.

We are declaring Black Friday Green Friday and planting a tree in Romania for every new user who checks their sustainability potential with our energy, heating or solar calculator between November 24 and December 1, 2023.

Even more trees: we will plant an additional tree in Romania for every user who finds the hidden tree in an article under the #Energy category.

Find out more

Articles on the topic

Reconstruction & Renovation

What are we doing?

Articles on the topic

Checklist: Renovate Energetically a House or Apartment

E-Charging Station or Wallbox: Smart Charging Solutions for Your E-Car

Planning a Solar System: 7 Steps to a Photovoltaic System