This presentation summarizes an underfloor air distribution (UFAD) system for providing conditioned air in commercial buildings. UFAD systems supply air through floor diffusers to directly condition the occupied zone. Key benefits include improved thermal comfort, energy efficiency, ventilation efficiency, layout flexibility, and reduced life cycle costs compared to traditional overhead systems. The presentation provides background on UFAD history, working, applications, disadvantages compared to conventional systems, examples of buildings using UFAD, and concludes that coordinated design and occupant understanding of temperature stratification are important for success.

1. CAREER POINT
UNIVERSITY
MAJOR ASSIGNMENT
PRESENTATION ON
SAVE ENERGY BY UFAD SYSTEM IN
COMMERCIAL BUILDING
• PRESENTED BY:-
• PRASHANT CHAUHAN
• UID-K11922
• BRANCH-MECHANICAL
• SEM/YEAR-6th/3rd
• PRESENTED TO:-
• MR.ADITYA MISHRA
• Assit.Proff. Of Mechanical
Deptt.

2. TABLE OF CONTENT
• INTRODUCTION
• HISTORY
• WORKING
• TYPES
• APPLICATION
• DISADVANTAGE
• UFAD V/S CONVENTIONAL
• BUILDING SIGMENT
• LIST OF BUILDING
• KEY BENEFIT
• CONCLUSION

3. INTRODUCTION
• Underfloor air distribution (UFAD) is an air distribution strategy for
providing ventilation and space conditioning in buildings.
• UFAD systems use an underfloor supply plenum located between the
structural concrete slab and a raised floor .
• system to supply conditioned air through floor diffuser directly into
the occupied zone of the building.
• Thermal stratification is one of the featured characteristic of UFAD
system, which allows higher thermostat setpoints compared to the
traditional overhead systems (OH).
• UFAD has several potential advantages over traditional overhead
systems, including layout flexibility, improved thermal comfort,
improved ventilation efficiency, improved energy efficiency in suitable
climates and reduced life cycle costs.
• UFAD is appropriate for a number of different building types including
commercials, schools, churches, airports, museums, libraries etc.

5. HISTORY
• More than 60% of commercial buildings in Europe and
Japan use UFAD .
• Canada has widely adopted the technology as the norm
for office buildings that seek sustainability credentials
and performance.
• The US has nearly 100MSF of operational UFAD / AF in
prominent cities & structures
• ASHRAE, along with the Center for Built Environments at
Berkeley have recently developed a new Design Guide.
• Camino offers the most comprehensive underfloor
product line & expertise in the industry to help you
realize your project goals.

6. WORKING
• In-floor “swirl diffusers allow
for personal control
• Low-pressure conditioned
air is introduced under the
floor plenum and allowed to
rise.
• Heat / cool linear perimeter
diffuser wash the window
walls to compensate for
outside temperatures.
• Cooling from below
Underfloor Air Distribution
• Warm air and indoor air
pollutants are returned to
building system for filtering
and conditioning.

8. Applications
• Sustainability projects
• New construction
• Renovation / repurpose
• High density / churn rate workspaces
• Auditorium style seating
• Display areas
• Floor height transitions
• Possible Applications

9. DISADVANTAGE
• Lack of familiarity
• Risk
• Building are a major long term investment so
no one can take risk
• Maintenance cost high

10. UFAD vs. Conventional Systems

11. Building Segments

12. List of buildings using UFAD system
• Bank of America Tower 2005
• David Brower Center 2009
• Francisco Federal Building2007
• Internal Revenue Service 2007
• The New York Times Building 2007
• Caltrans District 7 HQ 2005
• Foundry Square 2005
• Manitoba Hydro Tower 2000
• Vancouver Public Library 1995

13. Key Benefits
• Better indoor air quality
• Reduced energy & operational costs
• Potential to reduce overall building height
• Reduced maintenance costs
• Reduced time and cost for tenant fit-ups

14. CONCLUSION
• Coordinated efforts between the architect, mechanical
engineer and installing contractors.
• An access floor platform & plenum that is sealed from
excessive air leakage.
• A good understanding of the normal and exceptional
thermal sources that can affect the design and selection of
equipment and hardware.
• Knowledge of how unique spaces will be used (conference
rooms, meeting areas, private offices, etc.).
• A facility manager that understands the importance and
benefits of UFAD’s key attribute . . . “stratification” & the
benefits of the occupant’s personal control.

15. REFERENCE
• GOOGLE
• WIKIPEDIA
• WWW.SEMINAR.COM