Override of DSM control

What is MC-29?

MC-29 is a smart-ready service within the Smart Readiness Indicator (SRI), a European methodology that measures how well a building is prepared for smart technology. This service falls under the Monitoring and control domain.

The service examines demand-controlled regulation: a system that automatically operates technical systems based on current demand for heating or ventilation. MC-29 assesses whether and how a building user, such as an occupant or facilities manager, can override this regulation themselves.

What functionality levels exist?

The SRI defines functionality levels 0 to 4 for each smart-ready service, indicating how advanced a system is. For MC-29, these levels range from no override capability to a fully optimised solution.

• Level 0: no demand-controlled regulation is present.
• Level 1: demand-controlled regulation is present, but the user cannot override it.
• Level 2: the user can manually override the regulation and reactivate it later.
• Level 3: the user can time-based override the regulation, with automatic reactivation after a set period.
• Level 4: time-based override works in combination with optimised control.

Higher levels give users more control without compromising the building's energy efficiency.

How does MC-29 count towards the SRI score?

The SRI evaluates each smart-ready service against seven impact criteria, including energy efficiency and comfort. These criteria rest on three key functionalities that carry equal weight: ease of use, information to occupants, and adaptability.

MC-29 counts within the Monitoring and control domain, which together with eight other domains determines the total SRI score. The final result is expressed as a percentage and classified into one of seven classes, from below 20 per cent to 90 to 100 per cent.