Webinar - Underfloor Air Distribution Systems скачать в хорошем качестве

Webinar - Underfloor Air Distribution Systems

Underfloor Air Systems – Principles, Design and New Technology is a one hour AIA CES HSW accredited session presented by Dan Hahne, Varitec’s Director of High Performance HVAC Solutions. As ASHRAE Standard 62.1 attests, thermally stratified environments create superior indoor air quality by drawing a single path of clean air across occupant breathing zones. Underfloor HVAC systems (UFAD) offer an ideal method for creating such an environment. Supplying air through diffusers mounted in a floor allows the force of convection (warm air rises, cold air falls) to generate a single piston of clean conditioned air to rise from floor planes to upper room levels where it is exhausted from a space for superior IAQ. UFAD systems are also energy efficient. Being low pressure systems, fan horsepower can be reduced and, in Maricopa County, economizer hours doubled as diffuser supply air temperature is increased. Architecturally, recent UFAD technology allows for floor plenum heights to be designed at 10" or less, allowing for the reduction of floor to floor heights and overall cost of construction. Building renovation and associated mechanical equipment costs lowers due to the reduced cost of churn. Topics to be covered are: • Thermally Stratified Environments: Review • Underfloor Air Systems (UFAD) • UFAD Design Considerations • Semi-Turbulent & Displacement Ventilation • The Perimeter Zone • Plenum Pressure & Temperature: The Importance of Uniformity • Supply Air Design Conditions & Why • UFAD Air Handler Configurations • Plenum Leakage: Strategies to Avoid the Issue