This article is on the Impact of HVAC cleaning on energy consumption. It is very interesting in relation to the Data Centre world. As it shows how dust reduces the efficiency and increases the energy use of these systems. We can assume the same is true within the Data Hall/Computer room cooling environment.

Heating, ventilation, and air conditioning (HVAC) systems which play a critical role in maintaining indoor air quality and occupant comfort, particularly in high-occupancy commercial and educational environments. However, over time, the accumulation of dust and debris within system components and ductwork can significantly impair performance, leading to increased energy consumption and reduced airflow efficiency. This study explores the measurable impact of prescriptive cleaning on HVAC system performance, leveraging a new generation of low-cost monitoring technologies. By utilising Internet of Things (IoT) data archives, the research provides clear, real-time evidence of how targeted cleaning interventions can enhance system efficiency, reduce energy demand, and improve overall air delivery.

Article ABSTRACT: Following prescriptive cleaning, HVAC systems exhibited significant energy consumption reductions and delivered higher airflows compared to their uncleaned counterparts. On average, intervention systems saved between 41 % and 60 % on conveyance (fan/blower) energy, with one exception, and supplied 10 % and 46 % more airflow compared to their uncleaned counterparts. This research demonstrates how a new generation of low-cost HVAC system monitors can compile Internet of Things (IoT) archives to show immediate energy consumption benefits associated with cleaning HVAC components and their associated ductwork serving relatively high occupancy commercial and educational spaces. Click article below for full article.