The Science of ComfortTM
The fan column is a vertical fan unit designed to discharge air into a raised access floor plenum. The unit may be likened to an air handler as it mixes filtered, cooled return air with pre-treated outside air typically from a dedicated outdoor air system (DOAS) to achieve the design supply air temperature, then discharge the mixed air into the raised access floor plenum.
Topics: Underfloor, HVAC Fundamentals, Engineering, Design Engineering, Tech Tip
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
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