IMIT presents the new FAN/503S, one of the novelties of this autumn 2021: a DIN 503 built-in regulator to make easier to adjust fan-coils, even with inverter motors, improving home comfort and office.

FAN/503S and FAN 503 in comparison

In addition to the simplicity of installation and use, which we have always put in our products, the new FAN/503S is the evolution of the previous FAN 503, equipped with the main functions for the management and control of 2 solenoid valves (hot and cold) for systems with 2 or 4 pipes.

The novelties introduced in the FAN/503S are the backlit display and a version specifically designed to control the inverter motors of the fan-coils, with consequent energy and economic savings: rather than activating fixed fan-coil fan speeds, the new regulator will be able to modulate the speed according to the needs of the end user.

To learn more about the advantages of fan-coils with inverter motors, we invite you to read our article dedicated to the topic.

The FAN/503S range

The range includes 2 versions, both compatible with most of the plates on the market:

  • 3-speed fan motor controller @ 230V (classic applications)
  • 0-10V modulating brushless fan motor controller (inverter)

Where to find them?

FAN/503S will be available shortly by contacting our agents or our Sales Department.

If you are thinking of replacing your heating system with one that manages heating and cooling together, we recommend that you read our article before choosing among the products currently available on our Amazon store. To learn more and learn about the strengths and weaknesses of a fan coil system, you can find them here.

To find out more, browse our website, our catalog or consult a preview of the instruction manuals of our products for home and office comfort. For further requests, send an email to Our staff will reply as soon as possible.