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Bosch EasyControl on an Intergas boiler: only with the EasyControl Adapter

Part of the guide Smart heating, ventilation and cooling

Short answer: yes, the Bosch EasyControl works with an Intergas boiler, but only with the EasyControl Adapter. Intergas boilers use OpenTherm; the EasyControl itself speaks EMS bus (Nefit/Bosch). The adapter translates, and the boiler keeps modulating. This applies to the Kombi Kompakt HR, HRE and HReco, the Xtreme and the Prestige. The set with adapter is then the logical choice.

Intergas by series

Intergas seriesThermostat connectionEasyControlSpare parts
Kombi Kompakt HROpenThermWith adapterKombi Kompakt HR parts
Kombi Kompakt HREOpenThermWith adapterKombi Kompakt HRE parts
Kombi Kompakt HRecoOpenThermWith adapterKombi Kompakt HReco parts
XtremeOpenThermWith adapterXtreme parts
PrestigeOpenThermWith adapterPrestige parts
Xtend (hybrid heat pump on an Intergas boiler)OpenTherm via the boilerWith adapter; ask your installer how the heat pump is then controlledXtend parts

Always check the protocol in the installation manual of your appliance (search for "OpenTherm" or "thermostat connection"). Intergas fault codes with cause and part: Intergas fault codes.

What you need: thermostat with adapter

ProductFor which boilerPrice incl. VATDelivery
Bosch EasyControl Smart Thermostat White + EasyControl Adapter (Set)Thermostat + adapter in one: other brand (OpenTherm or on/off) or older Nefit€ 271.74Temporarily out of stock
Bosch EasyControl smart thermostat black + EasyControl Adapter (set)Thermostat + adapter in one: other brand (OpenTherm or on/off) or older Nefit€ 312.40In stock, usually delivered within 3–5 working days
Bosch / Nefit EasyControl Adapter – universal boiler connectionNeeded for OpenTherm or on/off boilers from other brands and for Nefit ProLine NxT, EcomLine and Economy€ 54.49In stock, usually delivered within 3–5 working days

Prices and stock are live from the webshop. Instalpunt does not check whether a part fits your specific appliance; check the protocol in your boiler's installation manual.

If you also want to control radiators per room, choose a set with radiator valves and order the adapter separately.

Step by step: connecting EasyControl

Always read your boiler's installation manual first. If you are unsure about the terminals, have an installer do it.

  1. Disconnect the boiler from the power (unplug it) and disconnect the existing thermostat. Bosch specifies that only one thermostat may be connected to the boiler.
  2. Connect the EasyControl Adapter with two wires to the boiler's thermostat terminals (the OpenTherm terminals on OpenTherm boilers, the on/off contact on on/off boilers). The adapter needs its own power socket.
  3. Connect the EasyControl thermostat with two wires to the adapter (no polarity).
  4. Order when switching on: first the thermostat, then plug the adapter into the socket, then the boiler. The adapter searches for OpenTherm for about a minute; if it does not find it, it switches to on/off. To make it search again: unplug the adapter for 25 seconds.
  5. Switch the boiler on, connect to your 2.4 GHz Wi-Fi via the Bosch EasyControl app (5 GHz does not work) and follow the setup.
  6. After half an hour, check whether the boiler modulates (the flame keeps burning at lower output) and whether the app shows the boiler status.

Things to bear in mind

  • On/off via the adapter: the boiler does not modulate and the app reads nothing (no water pressure, no consumption). You do keep remote control, the time programme and presence detection.
  • OpenTherm via the adapter: modulating. The water pressure is only shown if the boiler has a pressure sensor and the values have been checked once.
  • Nefit Easy Connect or RCC module on an older boiler: remove it first, EasyControl does not work together with it.
  • One EasyControl per boiler. You control multiple rooms with the Smart Radiator Thermostats (radiator heads), not with a second thermostat.
  • 2.4 GHz Wi-Fi is required; a network that only broadcasts 5 GHz does not work.

Frequently asked questions

Does my Intergas modulate with the EasyControl?

Yes. Via the adapter, the EasyControl controls the boiler in modulating mode over OpenTherm, just like an OpenTherm thermostat.

Can I see the water pressure of my Intergas in the app?

Only if the boiler has a pressure sensor and the value has been checked once; the HRE and Xtreme have one, older HR models not always.

Which terminals do I connect the adapter to?

To the OpenTherm terminals of the Intergas (marked in the manual as OT or modulating thermostat). Not to the on/off contact, otherwise the boiler will not modulate.

Isn't an OpenTherm thermostat simpler for an Intergas?

Technically yes: it does not need an adapter. If you choose the EasyControl for the app, the radiator valves or presence detection, the set with adapter is the solution.

Other brands

All Intergas spare parts at Instalpunt.

Sources: Bosch brochure "Is EasyControl geschikt voor mijn verwarmingssysteem?" (document number 6721867369, October 2024) and the page about the EasyControl Adapter on nefit-bosch.nl. Protocols of other brands: manufacturers' installation manuals. Page updated: 12 October 2026.

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