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SMART VENTILATION BEST PRACTICES
ASHRAE AHR EXPO 2017
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SMART VENTILATION BEST PRACTICES
Design for: Appropriate airflow Varying occupancy Smart economizing Low pressure drop Monitor, manage, and optimize AHR EXPO ©Ventacity Systems
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Design for appropriate airflow volume
SMART VENTILATION BEST PRACTICES Design for appropriate airflow volume Air flow standards US: IMC in most states Canada: NBC of Canada Both are based on ASHRAE 62.1 AHR EXPO ©Ventacity Systems
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Design for appropriate airflow volume
SMART VENTILATION BEST PRACTICES Design for appropriate airflow volume Ashrae Standard 62.1 Distribution matters! Standard design means 25% more air flow needed! Intelligent DOAS design can reduce required air flow Outdoor Airflow Zone Air flow Effectiveness = AHR EXPO ©Ventacity Systems
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Design for Varying Occupancy
SMART VENTILATION BEST PRACTICES Design for Varying Occupancy Multiple zone dcv CO2 sensors control zone dampers DOAS monitors pressure drop Modulates zone air flow based on real time occupancy 75% 5% 20% CO2 Sensor CO2 Sensor CO2 Sensor CO2 = 850ppm CO2 = 500ppm CO2 = 670ppm AHR EXPO ©Ventacity Systems
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Design for Smart Economizing
SMART VENTILATION BEST PRACTICES Design for Smart Economizing Smart economizer: Modulates bypass for supply temperature control Size ductwork for maximum air flow Coming soon, predictive economizing! AHR EXPO ©Ventacity Systems
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Design for Low Pressure Losses
SMART VENTILATION BEST PRACTICES Design for Low Pressure Losses Fitting selection: Different options can have a large effect on pressure losses ASHRAE Ductwork Database and App are good tools for comparison Radius Elbow r = 1.5W Co = ΔP = 0.01 in WG Equal to 13’ of ductwork Example: 12”x12” Duct 800 CFM Mitered Elbow Co = ΔP = 0.05 in WG Equal to 63’ of ductwork Mitered Elbow with vanes (1-1/2”) Co = ΔP = 0.00 in WG Equal to 6’ of ductwork AHR EXPO ©Ventacity Systems
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Design for Low Pressure Losses
SMART VENTILATION BEST PRACTICES Design for Low Pressure Losses Fitting selection: Different options can have a large effect on pressure losses ASHRAE Ductwork Database and App are good tools for comparison 90° Straight Tee Branch ΔP = 0.04 in WG Equal to 50’ of ductwork Example: 12” Φ duct 800 CFM in 600 CFM out 200 CFM take-of 12”x10”x8” Fitting 90° Straight Tee w/ 45° Entry Branch ΔP = 0.02 in WG Equal to 25’ of ductwork 45° Conical Wye Branch ΔP = 0.01 in WG Equal to 13’ of ductwork AHR EXPO ©Ventacity Systems
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Design to Monitor, Manage and Optimize
SMART VENTILATION BEST PRACTICES Design to Monitor, Manage and Optimize Feedback and monitoring Alerts for errors or filter changes Monitoring of system performance IAQ & energy reports Remote troubleshooting AHR EXPO ©Ventacity Systems
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Design Assistance and Workshops
SMART VENTILATION BEST PRACTICES Design Assistance and Workshops Ventacity Support Contact us to have our ventilation experts assist you in your project design. High performance ventilation workshops available for your firm or team AHR EXPO ©Ventacity Systems
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THANK YOU, from all of us at www.ventacity.com!
888-VENTIL8 x7342
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