Relay box 5V

Switch a contact with Adam

This Relay box is powered by 5V USB power and switched by Adam HA. In combination with Adam HA and a thermostat, you can then switch any contact up to 230V based on the heat demand.


  • Free shipping from €100 (NL) or €150 (BE)
  • Ordered before 12:00 on working days, delivered tomorrow
    (when in stock)
  • 2 weeks to change your mind


What is it?

Do you have a heat source such as a boiler or heat pump with a 230V on/off contact for heating? Then use this relay box to connect Adam HA to the 230V on/off contact.

If Adam HA has a heat demand, the heating contact will close. If there is no heat demand, the contact is open.

Please note, do you have a 24V on/off contact for heating? Then you do not need this Relay box. Then only use Adam HA’s own demand contact for heating.



  • 1x Relay box 5V with cables up to 1m


What do you need?

  • 1x Adam HA
  • 1x Thermostat
  • 1x Free socket