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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…

Search Articles Don’t Let Your Customers Forget May 19, 2025 I have been in the Indoor Air Quality industry for the past 15 years and have experienced other pandemics such as Bird Flu, Swine Flu, MERS, SARS, Ebola, and the Zika virus and one common theme occurred after each pandemic slowed and passed – people…

Search Articles How do I Best Filter My Recycled Dust Collector Exhaust? May 14, 2025 A Glimpse Into the Standard Setting Process of the new NFPA 660 Consolidated Standard for Combustible Dusts The National Fire Protection Agency (NFPA) standard on the appropriate media to use when recycling indoor air from dust collectors is a topic…

Search Articles The Gears of Grategy®: Innovating Air Filtration Workplace Culture May 14, 2025 In the wake of the pandemic, the air filtration industry faces a unique set of challenges and opportunities within an increasingly employee-driven and competitive market. The adage, “Times are changing,” rings truer than ever, marking a definitive shift from the “good…