Introduction to interview series 2025

In this issue of REHVA Journal (2/2025) we start with publishing a series of interviews focusing on smart technologies and HVAC systems. Our discussions will cover a wide range of topics, from intelligent buildings to PD (Proportional-Derivative) controllers to BACS (Building Automation and Controls Systems) and AI (Artificial Intelligence) controlled systems.

We will explore how technology can transform buildings into smart and intelligent structures. But what do we mean by “smart building “or “intelligent building”? Interestingly, Wikipedia redirects both terms to the “Building automation” page, which states: A building controlled by a BAS (Building Automation System) is often referred to as an “intelligent building”, a “smart building”, or (if a residence) a smart home. BAS is described as the automatic centralized control of a building’s HVAC systems.

When did this all begin? The journey likely started in the late 1940s with the introduction of the transistor, a fundamental component of modern electronics. The next significant milestone was the development of the digital computer in the early 1950s. The third crucial innovation was the Internet, initially known as ARPANET, developed for the US military in the 1960s.

These inventions laid the groundwork for digital communication. However, the driving force for controlling and operating buildings more efficiently emerged during the Oil Crisis of the 1970s. This period marked a shift towards not only automating building operations but also enhancing energy efficiency. Consequently, ventilation rates were reduced, leading to the identification of SBS (Sick Building Syndrome).

From the late 20s century onwards, we have witnessed significant advancements in the design and operation of (office)buildings. The advent of the internet has greatly enhanced the intelligence and smart capabilities of buildings and their interaction with the energy grids. Let’s talk about these developments with experts whose work helps to improve design and operation of buildings through smart technology.