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Kitchen Ventilation

Kitchen Ventilation. Systems. Multi Point Ventilation. Heat Recovery Ventilator. Bath Ventilation. Bathroom Exhaust Fans. Bathroom Exhaust Fans. CODE for Baths without bathing or spas: 3 SF Glazing ½ Operable or Baths 75SF or less - 50 CFM Fan or

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Kitchen Ventilation

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  1. Kitchen Ventilation

  2. Systems

  3. Multi Point Ventilation

  4. Heat Recovery Ventilator

  5. Bath Ventilation

  6. Bathroom Exhaust Fans

  7. Bathroom Exhaust Fans CODE for Baths without bathing or spas: • 3 SF Glazing ½ Operable or • Baths 75SF or less - 50 CFM Fan or • Over 75 SF – Intermittent Ventilation System 1 air change every 12 minutes or • Continuous Ventilation System at 20 CFM

  8. Bathroom Exhaust Fans Baths with bathing and spas 50 CFM Intermittent or 20 CFM Continuous

  9. Multi Point Ventilation

  10. Kitchen Ventilation Considerations Fan Type • Propeller Fan – Limited air capacity and noisy • Axial Fan – Better air movement but still noisy • Centrifugal Blower (Squirrel Cage) The best

  11. Axial Fan

  12. Centrifugal Blower

  13. Sound Levels • Sound is measured in Sones • 1-Sone equals the loudness of a pure tone having a frequency of 1,000 hertz at 40 decibels.

  14. Decibels • 0 The softest sound a person can hear with normal hearing • 10 normal breathing • 20 whispering at 5 feet • 30 soft whisper • 50 rainfall • 60 normal conversation • 110 shouting in ear • 120 thunder

  15. Sones • The Home Ventilation Institute sets a limit of 9.0 sones for kitchen fans up to 500 CFM • Reference – A fan with a sone rating of 8.0 sones is twice as loud as one rated at 4.0 sones. • Reference - Refrigerators run at about 1.0 sone.

  16. Broan Silent Series 110 cfm .7 Sones

  17. In-Line Ventilator Fan 110 CFM 1.0 Sones 210 CFM 2.0 Sones

  18. Kitchen Ventilation

  19. Kitchen Exhaust Fans CODE 100 CFM Intermittent Or 25 CFM Continuous

  20. Multi Point Ventilation

  21. Vented Hood System

  22. Recirculating Fan in Microwave Combo

  23. Kitchen Ventilation • Heat • Grease • Steam • Odor • Smoke

  24. Recirculating Range Hood

  25. Recirculating Ventilation System • This type of system will only remove two • Heat • Steam

  26. Downdraft

  27. Down Draft Ventilation

  28. Down Draft Ventilation

  29. Range Hood Installation

  30. Integral Fan Vented Through Roof

  31. In Line Fan

  32. Integral Through Soffit

  33. Remote Ventilator

  34. Through Crawlspace

  35. Down Draft Through Floor

  36. Down Draft Through Roof

  37. Kitchen Ventilation Considerations • Fan – 250 CFM minimum • Ducts • Duct run lengths • Interior Fan (power) • Keep duct runs as short and straight as possible. • 6” round or 3 ¼” x 10 rectangular ducts • Maximum run = 25’ maximum

  38. Kitchen Ventilation Considerations • Exterior or In-Line Fan (power) • 9” round or 3 ¼” x 14” rectangular duct • Maximum run = 55’ maximum

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