This is how easy it works:

Enter your name and email address

Select your preferred sharing method

Your friend uses your invite and saves 20% on their first order

As soon as their order is placed, you receive your 20% voucher

Everyone saves energy!

The program is only valid in UK, Germany and the Netherlands. Vouchers are only valid for orders shipped to one of those countries.

Voucher codes are valid until 31.12.2022, can only be redeemed at and can not be used retrospectively.

Referral discounts may vary and cannot be combined with other promotions or vouchers. Refurbished devices are excluded from the referral programme.

*Based on the Fraunhofer Institute for Building Physics IBP from the "Simulation Study on Energy Saving Potential of a Heating Control with Absence Detection and Weather Forecast", IBP Report 527 (2013).