Belimo RetroFIT+ App - Easy and convenient to your new product. The new Belimo RetroFIT+ App allows you to easily find the best fitting HVAC (Heating, Ventilation and Air Conditioning) Belimo replacement with innovative technology for your old or damaged actuator. Whether Air applications or Water solutions if you are searching for a modernization or a replacement of your installation, you will quickly find the actuator (Globe valve actuator, rotary valve actuator,..) of Belimo which covers yo