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Achieving Truly Effective Air Filtration in Residential Applications Spring/Summer 2025 Air Media Dan Dearden CAFS, NATE Senior Efficiency Analyst, RSES CMS, NCI HVAC Efficiency Analysis Certified, IGSHPA Certified, Air Balance Certified. As a young HVAC technician in the late 1970s, I often faced a curious contradiction. Customers who had purchased our “best” air cleaners were…

Indoor Air Quality (IAQ) Management In Healthcare a Critical Tool For Healing, Safety, and Performance Fall 2025 Air Media By Stephanie Taylor, MD, MArch, Medical Advisor, ThinkLite Air Managing indoor air quality (IAQ) to optimize occupant health is no longer just an engineering or facilities issue—it has become a frontline clinical and operational imperative. The…

Wildfire Smoke’s Hidden Threats: When Particle Size and Chemistry Undermine Filtration Fall 2025 Air Media By Sissi Liu, CEO, Metalmark Innovations, PBC Wildfire smoke particles fall into a filtration blind spot—small enough to evade mass-based sensors, yet chemically potent enough to degrade filter media. Understanding their unique size and composition is key to protecting indoor…

Installation, Tensioning & Maintenance of V-Belts Introduction to Power Transmission Belting used in the HVAC-R Industry Types of Power Transmission There are various types of power transmission devices commonly used in industry today. Among them for example, chains, gears, v-belts and synchronous belts are widely used. The focus of this exercise will be a general…

Improving Indoor Air Quality During Wildfires In California and other U.S. western states, wildfires have become more frequent and intense, adversely impacting air quality and human health. Smoke from wildfires contains many toxins and irritants, including particles smaller than 2.5 microns in diameter, which, due to their size, penetrate deep into the lungs and contribute…

Clouds of Dust You know what I am? I’m a dust magnet!” enthusiastically proclaimed Pig-Pen, a beloved character in the popular comic strip, Peanuts, by Charles M. Schulz. It is said that Schulz drew inspiration for the character from observing his own son’s propensity for being surrounded by dirt1. Indeed, if you take a magnifying…

Search Articles Making Polling Places Safer May 29, 2025 The Latest Recommendations from the ASHRAE Epidemic Task Force As election season continues throughout the nation during the pandemic, the ASHRAE Epidemic Task Force is offering HVAC and water supply system guidance for polling places. ASHRAE’s Building Readiness guidance provides practical information and checklists to help…

Guidance for Dealing with Wildfire Smoke The frequency of wildfires and the range of their impact is on the increase.  What has often been considered a west coast phenomenon made its presence felt on the east coast starting the week of June 4th, 2023, when the prevailing wind patterns brought wildfire smoke down from Canada…

History and Future of Nanofibers in Air Filtration What are Nanofibers? Nanofibers are defined by being a one-dimensional fiber in length. The diameter is so small that the fiber is practically invisible to the flow of the medium being filtered. Different sources cite varying diameters that classifies a nanofiber. Are nanofibers less than 1 micron…

Search Articles Molecular Filtration May 19, 2025 History The first documented use of activated carbon (known as charcoal) can be traced back to around 3750 B.C. when it was first used by the Egyptians for smelting ores to create bronze. By 1500 B.C. the Egyptians had expanded its use to healing intestinal ailments, absorbing unpleasant…