Unitized Multi-Family Ventilation IAQ, Bath & Kitchen Fans - PowerPoint PPT Presentation

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Unitized Multi-Family Ventilation IAQ, Bath & Kitchen Fans

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  1. Unitized Multi-Family Ventilation IAQ, Bath & Kitchen Fans Innovation in Ventilation Improving the Quality of Indoor Environments

  2. “Unitized” Multifamily Venting(Venting each dwelling independently) • Common in Low-Rise Apartments and High-rise Condominiums • Primarily intermittent bath and kitchen fans • Usually does not address IAQ

  3. Challenges of Unitized Venting Multi-family Buildings • Fan Locations and Ducting • Venting Penetrations • “Traditional” Fan Performance • Airflow Control and Occupant Operation • Maintenance

  4. Challenges of Unitized Venting Multi-family Buildings • Locating individual fans and vent ducts always presents a challenge. • Multiple Penetrations can be costly and unsightly.

  5. Challenges of Unitized Venting Multi-family Buildings Lengthy duct runs make installation difficult, and dramatically affect airflow performance.

  6. –Building Codes • Most residential building codes for ventilation are based on ASHRAE standard 62.1 for high rise buildings (over 3 floors) and 62.2 for low rise buildings.

  7. Challenges of Venting -TRADITIONAL SYSTEMS • Intermittent Ceiling Mounted Bath Fans

  8. NOISE NOISE Traditional Bath Fans –Performance Limitations • Low airflows in most installations\ • Noise…resulting in non-use LOW AIRFLOW

  9. Duct Type Airflow Static Pressure drop (Ps) in inches w.g. 10 feet 20 feet 30 feet 40 feet 3" dia. 4" dia. 3" dia. 4" dia. 3" dia. 4" dia. 3" dia. 4" dia. Flex 30 cfm .040 .010 .080 .020 .120 .030 .160 .040 50 cfm .100 .023 .200 .046 .300 .069 .400 .092 70 cfm .200 .050 .400 .100 .600 .150 .800 .200 Smooth 30 cfm .029 .007 .058 .014 .087 .021 .116 .028 50 cfm .077 .018 .154 .036 .231 .054 .308 .072 70 cfm .143 .032 .286 .064 .429 .096 .572 .128 Traditional Bath Fans –Low Airflow Performance • Pressure Drop from Long Duct Runs…

  10. Airflow Equipment pressure drop for cfm and static pressure (Ps) Roof Cap Wall Cap 90 deg. Elbow 45 deg. Elbow 3" dia. 4" dia. 3" dia. 4" dia. 3" dia. 4" dia. 3" dia. 4" dia. 30 cfm .073 .055 .058 .044 .028 .007 .014 .004 50 cfm .119 .091 .095 .073 .078 .018 .039 .009 70 cfm .166 .128 .133 .102 .145 .032 .073 .016 Traditional Bath Fans –Low Airflow Performance • Pressure Drop from Duct Terminations and Elbows…

  11. Traditional Bath Fans –Low Airflow Performance Usually means…Lower Airflow than expected 20 CFM 50 CFM

  12. Traditional Bath Fans –Low Airflow Performance • Typical Pressure Drop Example: 50 cfm fan, 25 ft. smooth 3” vent duct, two 90 deg. Elbows, & wall cap. • Duct = .193” Ps • Wall cap = .095” Ps • Elbows (Total) = .156” PS • TOTAL PRESSURE DROP = .444” Ps • What actual airflow delivery can you expect?

  13. Traditional Bath Fans –Low Airflow Performance 26 cfm 50% of the required flow!

  14. Traditional Bath Fans –Noise Prevents Proper Use • HVI independent studies have determined that, “…anything above 1.5 sones for intermittent, and 1.0 sone for continuous operating fans is considered objectionable to people.” • Over 90% of the fans sold in 2001 delivered 4.0 to 6.5 sones… 3 TO 4 TIMES TOO LOUD!!!

  15. Traditional Bath Fans –Maintenance Issues • What about maintenance? • Cleaning and replacement?

  16. The American ALDES Solution • How To Address the Challenges of: • Airflow through long duct runs • Noise • Occupant Operation • Minimize outside penetrations • Maintenance

  17. The American ALDES Solution • VentZone • System • Bath,Kitchen and/or IAQ systems • Single ENERGY STAR rated fan • Zone controlled • Self balancing • Pressure independent • Continuous duty rated

  18. NOISE NOISE The American ALDES Solution • Remote installation ensures quiet operation and proper occupant use. • In most installations, the sound levels in the space are between 0 and .75 sones.

  19. The American ALDES Solution • Penetrations to the outside or central exhaust shaft are minimized Example 1 – Two baths + One w.c. Single Outlet

  20. The American ALDES Solution Our Fans -Maintenance free operation External Rotor Motor – Totally sealed – Ideal for moist environments Backward Inclined Impeller Resists “loading”

  21. The American ALDES Solution Solutions to complete any installation. ENERGY STAR Fans Zone Control Devices Wall/Roof Caps Timers and Controls Inline Fans/Dryer Boosters ERV’s and HRV’s Constant Airflow Regulators Make-up Air Solutions Sleeves, Boxes & Grills Backdraft dampers

  22. Please Click Here to Return to the Website For More Information Please Visit Our Website at www.AmericanAldes.com Or Call Our Factory Headquarters at: 800.255.7749 Or Reach Scott Madden, Director of Business Development smadden@aldes-us.com