Smart-ready service V-2d · Ventilation
Supply air temperature control at the air handling unit level
In short
- 1This page covers the regulation of supply air temperature in air handling units, one of the smart-ready services within the Smart Readiness Indicator.
- 2The service has four levels, ranging from no automatic control to a set point that adjusts with the load in the space.
- 3This service is not included in the simplified method A, but it is included in the full method B of the SRI.
The levels
Level 0
No automatic control
Level 1
Constant setpoint: A control loop enables to control the supply air temperature, the setpoint is constant and can only be modified by a manual action
Level 2
Variable set point with outdoor temperature compensation
Level 3
Variable set point with load dependant compensation. A control loop enables to control the supply air temperature. The setpoint is defined as a function of the loads in the room
What does this smart-ready service do?
This service, V-2d, concerns the regulation of supply air temperature at the level of the air handling unit. An air handling unit is the installation that heats, cools, and distributes air throughout a building. The temperature of that supply air partly determines both comfort and energy use in the spaces served by the unit.
The Smart Readiness Indicator (SRI) assesses not only whether control is present, but also how advanced that control is. This is done through functionality levels, ranging from 0 (no automatic control) to higher levels with dynamic adjustment.
What levels does the SRI distinguish?
Four levels are defined for this service. At level 0, there is no automatic control of supply air temperature. At level 1, a control loop regulates the temperature, but the set point is fixed and can only be adjusted manually.
Level 2 adds outdoor temperature compensation: the set point varies depending on the outdoor temperature. Level 3 goes one step further. There, a control loop determines the set point based on the actual load in the space, enabling finer tuning to the real requirement.
Why is this component not visible in every SRI assessment?
The SRI methodology uses two calculation methods. Method A is a simplified version with 27 smart-ready services; method B is the full version with 54 services. This service, V-2d, is part of method B only.
This means that a building assessed under method A does not include this specific service in the score. In an assessment using method B, the regulation of supply air temperature counts within the Ventilation domain and contributes to the seven impact criteria that the SRI applies, such as energy efficiency and comfort.
Relevant for these building types
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