Saving Energy Savings with HVLS Fans Josh Eddy LEED-AP National Sales Manager Big Ass Fans
Outline Who is Big Ass Fans HVLS fan types How HVLS fans save energy HVLS fan applications How utilities are helping Questions
Who is Big Ass Fans? The worlds largest manufacturer of large, high efficiency ceiling fans Headquartered in Lexington, KY Direct Regional sales representatives Nationwide 40,000+ 000+ fans installed world wide
Why the Name Big Ass Fans? 1999 HVLS Fan Company 2001 Debated between:
Research & Development 35% Less Energy 58% Less Water 30% Additional Ventilation High Thermal Comfort 9% Materials Reduction 4 ID Credits 30% Recycled Content 12 points related to BA Fans 41 Total LEED Points
Big Ass Fans Product Line Element Powerfoil X Powerfoil X Plus Pivot
Big Ass Fans Product Line Isis AirGo
Airfoils Custom designed airfoil (not flat blades) Maximize airflow (at all fan speeds) Minimize power consumption & noise Powerfoil Element
Winglets
Commercial vs. Industrial Fans Element Direct drive <40 dba Redundant safety features Low Energy Usage
Controls Multiple fans with 1 wall control Low voltage cat5 cable Standard junction box 7.25 x 4 Easy-to-read display Easy installation
NEW Isis Commercial Fan Compact design is sleek and attractive for commercial spaces Industrial grade steel mounting hardware for durability Aerodynamic airfoil design provides much more efficient air movement than simple flat blades Onboard electronics eliminate electrical noise and simplify installation
NEW Isis Commercial Fan Quiet enough for use in a library (<40 dba at full speed) Fits ceilings as low as 12 ft Fan diameters 8 ft, 9 ft, 10 ft Weighs under 100 lbs
NEW Isis Commercial Fan Moves more air than nine 52 high-speed h ceiling fans Energy consumption comparable to a refrigerator light bulb Year-round round energy savings Summer savings of 10-15% 15% by providing a cooling breeze Winter savings of up to 25% by gently moving warm air toward the floor
Stratification in Heating Mode Difficult to balance heating and cooling requirements with one distribution system Warmer air rises toward the ceiling Stratification of 0.75-1.0 F /ft
Winter Destratification Mixing the air from floor to ceiling allows for lower average building temperature* without loss of comfort. Uniform air temperature eliminates cold spots at the floor level. *No change in thermostat set point!!!
Winter Destratification Savings HVLS ceiling fans can provide substantial winter energy savings from destratification. HVLS fans are needed to achieve air circulation without exceeding 40 fpm at head height that will result in draft complaints. HVLS fans at low speed offer much greater aerodynamic efficiencies (up to 1500 cfm/w) compared to smaller faster fans (300 cfm/w).
Should I Reverse the Fan??? Destratification = Mixing (without Draft) Fan Laws RPM related to HP 3 Example 1 hp (750 W) motor on fan 100% Max RPM in reverse = 100% hp (750 W) 33% Max RPM forward = 1/3 x 1/3 x 1/3 x 1 hp = 1/27 x 750 W = <50 W
Air Speed & Cooling Effect ASHRAE Thermal Comfort Tool
Savings from Using Elevated Air Speed for 1 st Stage of Cooling Rule of Thumb Each degree of thermostat offset saves ~1.5% to 2% of cooling energy - Exelon Corporation 5 F = 7% to 10% reduction TRACE 700 Model - 20,000 ft 2 Building Location 75F Cooling 79.7F Cooling %Reduction Miami 121,290 kwh 108,735 kwh 10.35 % Houston 94,420 kwh 87,046 kwh 7.81 % Los Angeles 45,913 kwh 43,404404 kwh 5.46 % New York 50,575 kwh 46,071 kwh 8.91 % Chicago 43,035 kwh 39,175 kwh 9.01 % Denver 38,904 kwh 35, 147 kwh 9.66 % Minneapolis 38,147 kwh 34,799 kwh 8.78 %
Heating Savings Applications Types Open Spaces with heating Ceiling heights of 14 to 125 foot Example Applications: Warehouses Manufacturing Industrial Distributions Centers Gymnasiums Hangars Churches Fire Stations Water Parks Lobby areas Fitness Centers Retail Showrooms Maintenance Facilities Office Buildings Sports Arenas Grocery stores Indoor Pools Cafeterias
How you can help? Rebate based on gas savings. $ per Therm saved ($1/therm saved) $ per fan installed ($1,000 per fan) Introduction to customers for fan application site visit and free rebate savings analysis. Joint customer workshops with utilities?
Design Assistance Heating Savings Estimator - Input Data Please fax the completed form to 859-233-0139. Incomplete forms will result in a less accurate estimate. 1. Name of Facility: 2. Location of Facility (City, State): 3. Age of Facility: 4. Building Construction (e.g. Brick, Aluminum ): 5. Roof Insulation (e.g. steel deck, foam insulation R15): 6. Floor Area (Square feet): 7. Height of heating equipment above floor (feet): 8. Average distance from floor to roof deck (feet): 9. Thermostat setpoint in winter ( F): 10. Facility Use (e.g. warehouse, light industry, retail ): 11. Type of fuel used for heating (e.g. natural gas, LP ): 12. Annual heating season fuel usage (therms, ccf ): 13. Cost of fuel used during heating season ($): 14. Type of heating equipment (e.g. forced air furnace...): 15. Age of heating equipment (years): 16. Heating Season (e.g. October 1 to March 31): Optional 17. On a scale of 1 to 10 rate the temperature at the top of space (10 being the hottest, 1 being the temperature 5 above the ground):
Rebate Project Example 374,160 sq ft Building, 65 foot ceilings Pittsburgh, CA (12) 20 Powerfoil Big Ass Fans Installation cost = $126,000 per fan (electrical estimated) Estimated gas savings from destratification =151 151,850 Therms/year Pacific Gas & Electric rebate ($1/therm up to 80% of project) ***Gas rebate would be 80% or $100,800 if project was fans only*** Simple Payback for customer = less then 2 heating season months
Industrial Applications
Commercial Applications
More Information? www.bigassfans.com Catalogs Installation Guides Specifications Articles Photos Videos
Questions & Contact information Contact Info: Josh Eddy National Sales Manager Big Ass Fans josh@bigassfans.com 714-969 969-8909 (office) 714-580 580-3370 (cell) Lexington Corporate office: 1-877 877-BIG FANS (1-877 877-244 244-3267)
References Aynsley, R. (2005) Saving Heating Costs in Warehouses. ASHRAE Journal, vol. 47, No. 12, December, 46-51. Aynsley, R. (2005) Saving energy with indoor air movement. The International Journal of Ventilation,, Vol. 4, No. 2, Sept., 167-175. 175.
References ANSI/ASHRAE Standard 55-2004 Thermal Environmental Conditions for Human Occupancy ASHRAE Handbook of Fundamentals,, 2005, Chapter 8, Indoor Environmental Health, pp. 8.1 8.20 ASHRAE (1998) Field studies of thermal comfort and adaptation, ASHRAE Technical Data Bulletin, Vol.14,, No.1. Atlanta: American Society of Heating, Refrigerating g and Air-Conditioning Engineers, Inc. pp.156.
References OSHA Technical Manual,, Section III: Chapter 4, on web at www.osha.gov Wyndham,C. and Strydom, N. (1965) The effect of environmental heat on comfort, productivity and health of workmen. South African Mechanical Engineer,, May, 208-221 221. Khedari, J., Yamtraipat, N., Pratintong, N., and Hinrunlabbh, J. (2000) Thailand ventilation comfort chart. Energy and Buildings Vol. 32, pp. 245-249 249