HEALTHCARE VENTILATION
policymakers in understanding indoor pollution patterns, and crafting more targeted regulations. By providing public access to IAQ data, individuals can be empowered to make informed decisions about their health.
Technological innovation and sustainable building design Advances in HVAC systems, air filtration technologies, and sustainable building materials, are critical for improving indoor air quality. For instance, energy-efficient HVAC systems with pleated hybrid media filters are essential for effectively removing airborne particles and odours. Combining mechanical and chemical filter media enhances particle capture and odour control, improving indoor air quality without excessive energy use. However, space limitations within air-handling units can hinder the incorporation of larger surface area filters, which is counterproductive given the high particle concentration in fresh and pre-filtration stages. Short filter lifespans lead to frequent maintenance, building operations disruptions, and particle dispersion risk from improperly handled filters, particularly in regions needing more adequately trained maintenance personnel. Moreover, smart systems that automatically adjust ventilation based on pollutant levels offer a proactive approach to maintaining IAQ. However, the need to balance energy efficiency with adequate ventilation is a significant challenge; increasing ventilation can lead to higher energy consumption, and potentially introduce a variety of outdoor pollutants with variating concentrations, complicating air filter performance when filters become prematurely clogged due to particle deposition on depth filter media (see Figure 2). Engineered filter selection targeting the contaminants’ type, size distribution, and
concentration relative to the pore size distribution of filter media, can further extend the stationary stage of depth filtration, leading to sustainable filter performance, as illustrated in Figure 3. Pursuing sustainable and healthy living integrates system
technologies that prioritise improved indoor air quality from design to operation. Awareness of IAQ in our building environments should extend beyond those that house newborn children, or elderly family members suffering from chronic respiratory conditions. Striving for better indoor
Figure 3: Depth deposition of particles during the stationary stage of the filter-loading.
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Technology for those who care
February 2025 Health Estate Journal 73
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