The Science of ComfortTM
Smudging is more commonly known among First Nations as a ceremonial burning of one or more medicines gathered from the earth. In the world of HVAC, smudging is a term used to describe dirt being deposited on the ceiling around a supply diffuser, a common problem in all types of buildings.
Topics: GRD, Diffusers, HVAC Fundamentals, HVAC, Engineering, Design Engineering, Tech Tip
Fan filter units can be applied in a variety of ways to best suit your application. This blog post provides an overview of the best practices for designing a system with Fan Filter Units.
Topics: HVAC Fundamentals, HVAC, Engineering, Design Engineering, Training, Tech Tip, Critical Environments
A fan filter unit, or FFU, is essentially a filtered laminar flow diffuser with an integrated fan and motor.
The integrated fan and motor provide enough static pressure to overcome the pressure drop of the internally mounted HEPA or ULPA filter.
Topics: HVAC Fundamentals, HVAC, Engineering, Design Engineering, Training, Tech Tip, Critical Environments, Filtration
Displacement ventilation provides low velocity air at around 65°F that relies on buoyancy forces to drive the air motion. Supply air spreads across the floor until encountering thermal plumes from heat sources that naturally drive the clean, conditioned air up through the breathing zone. Heat and particulate are carried up to high-level return or exhaust grilles instead of getting recycled through the space. The result is high ventilation effectiveness and improved thermal comfort delivered in an energy efficient manner.
Topics: Displacement, Thermal Comfort, HVAC Fundamentals, HVAC, Engineering, Design Engineering, Tech Tip
The future of commercial office design faces a number of challenges, including a shift away from densely occupied open office concepts and a heightened concern for occupant health. North America continues to adopt newer energy codes that task design firms to further reduce energy consumption. In addition, indoor air quality (IAQ) has arguably become a principal element of building design.
Although several air distribution systems can be designed to succeed at both of these elements, underfloor air distribution (UFAD) offers significant flexibility and IAQ improvements over traditional air distribution approaches. While the interior zone design has changed little over the years, the perimeter offering has evolved significantly.
Topics: Underfloor, Thermal Comfort, HVAC Fundamentals, HVAC, Design Engineering, Tech Tip
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