Air changes per hour definition

Air changes per hour. (ACPH) means the number of times a volume of air equivalent to the room passes through the room each hour.
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Air changes per hour means a measure of the fresh air volume added to or removed
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Air changes per hour means a number calculated by the maximum work area length in feet times the maximum work area width in feet times the maximum work area height in feet divided by 60 times the cubic feet per minute of air movement (L x W x H)/(60 x CFM).
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Examples of Air changes per hour in a sentence

  • Unidirectional airflow to be achieved by appropriate negative differential pressures and a minimum of 6-12 Air changes per hour to be achieved.

  • Air changes per hour at a standard test pressure difference of 50 Pascals.

  • Our air intakes to for the HRV unit to support circulation of clean air and meet Air changes per hour standards are on that side and cannot be rerouted.

  • Air changes per hour in spaces requiring it such as storage spaces, electrical switch gear rooms, crawl spaces etc.

  • Air changes per hour (ACH) is the most commonly used unit, and is the volume of air per hour divided by the room volume.

  • Assessment should be done qualitatively and quantitatively i.e. in terms of Air changes per hour in the different parts of building like basements, generator rooms occupancies (rooms) toilets, kitchen, passages, ways and stair cases.

  • For building like battery room, Chlorination plant – 30 Air changes per hour.

  • Changes in Energy Consumption 424.5 Research needs 45 CHAPTER 5: Conclusions 46GLOSSARY 48REFERENCES 49APPENDIX A1: Tenant Indoor Environmental Quality and Energy Education 52APPENDIX A2: Retrofit Selection Protocol 55APPENDIX A3: Energy Use Data 101LIST OF FIGURESFigure 1: Air changes per hour at 50 Pa (ACH50) and normalized leakage at 4 Pa (NL4) measured before and after retrofits.

  • American Conference of Governmental Industrial Hygienists ACH – Air changes per hour ARB – Air Resources Board, Cal/EPA AREL - Acute Reference Exposure Level ASTM – American Society for Testing and Materials AQS – Air Quality Sciences, Inc.

  • Air changes per hour is a measure of the number of times the air within an enclosed space is replaced.


More Definitions of Air changes per hour

Air changes per hour means an airflow rate sufficient to remove/replace the total volume of air in a given room at a specified number of times each hour.
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Related to Air changes per hour

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  • Digital Signal Level 1 or "DS1" means the 1.544 Mbps first-level signal in the time-division multiplex hierarchy. In the time-division multiplexing hierarchy of the telephone network, DS1 is the initial level of multiplexing.

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  • Digital Signal Level means one of several transmission rates in the time division multiplex hierarchy.

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