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

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

  • Air changes per hour (ACH) and time in minutes required for removal efficiencies of 90%, 99%, and 99.9% of airborne contaminants*Minutes required for a removal efficiency of:ACH90%99%99.9% *This table has been ad apted from the formula for the rate of purging airborne contaminants (99 ).

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

  • In this dissertation, it will be assumed that the seasonal average air exchange rates per hour, I (Air changes per hour, ACH), due to the ventilation and infiltration for a building may be I=0.5 ACH, 1.0 ACH, 1.5 ACH, and 2.0 ACH.

  • Air changes per hour (ACH) for an experiment is calculated using the following equation.

  • Your Home's AirtightnessThe airtightness values for your house, measured as ACH@50 pa (Air changes per hour at 50 pascals) and ELA@10 pa (Equivalent leakage area at 10 pascals), are recorded at the top of this report.

  • The software shows whether the rebar is an individual piece (= 1) or bundle (= 2).

  • Figure 6: Air changes per hour and time required to remove 99% or 99.9% of airborne particles from room air after the patient leaves the area or when aerosol-producing procedures are complete.

  • The air flow rate at each supply-extract grille is calculated as follows: Air flow rate (m³/s) ='indicated velocity' (m/s) x area of supply/extract grille (m²) The global rate of air change per hour achieved by the vehicle deck ventilation system(s) is subsequently calculated as follows: Air changes per hour = sum (Air flow rates at extract grilles (m³/s) x 60 x 60)/ (Volume of vehicle deck (m³)) Appendix 3 - Recommendations for the evaluation of air quality in ro-ro cargo spaces 1.

  • Nomenclature ACH Air changes per hour – a metric used for measuring the rate of air leakage from a house.


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

  • Changes/Extra Work The SUBRECIPIENT shall make no changes to this CONTRACT without the COUNTY’s written consent. In the event that there are new or unforeseen requirements, the COUNTY with the SUBRECIPIENT’s concurrence has the discretion to request official changes at any time without changing the intent of this CONTRACT.

  • Digital Signal Level 1 (DS-1 means the 1.544 Mbps first level signal in the time division multiplex hierarchy.

  • Custom Local Area Signaling Service Features (CLASS) means certain call-management service features that are currently available from SBC-13STATE’s local networks. These could include: Automatic Call Back; Automatic Recall; Call Trace; Caller Identification and related blocking features; Calling Number Delivery; Customer Originated Trace; Distinctive Ringing/Call Waiting; Selective Call Forward; and Selective Call Rejection.

  • Additional Day-ahead Scheduling Reserves Requirement means the portion of the Day- ahead Scheduling Reserves Requirement that is required in addition to the Base Day-ahead Scheduling Reserves Requirement to ensure adequate resources are procured to meet real-time load and operational needs, as specified in the PJM Manuals.

  • 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.

  • Digital Signal Level 0 (DS-0 means the lowest-level signal in the time division multiplex digital hierarchy, and represents a voice-grade channel operating at either the 56 Kbps or 64 Kbps transmission bit rates. There are twenty-four (24) DS-0 channels in a DS-1.

  • Base Day-ahead Scheduling Reserves Requirement means the thirty-minute reserve requirement for the PJM Region established consistent with the Applicable Standards, plus any additional thirty-minute reserves scheduled in response to an RTO-wide Hot or Cold Weather Alert or other reasons for conservative operations.

  • Digital Signal Level 0 or "DS0" means the 64 Kbps zero-level signal in the time-division multiplex hierarchy.

  • Digital Signal Level 3 (DS-3 means the 44.736 Mbps third level signal in the time division multiplex hierarchy.

  • Service Level Agreements means an agreement between NZX and a Market Participant and/or an Advisor setting out the terms and conditions of use of NZX technology and services;

  • Service Level Agreement or SLA means the processes, deliverables, key performance indicators and performance standards relating to the Services to be provided by the Service Provider;

  • Monitoring Requirements Schedule means the Schedule containing details of the monitoring arrangements.

  • Authorized Control Level RBC means the number determined under the risk-based capital formula in accordance with the RBC instructions;

  • Digital Signal Level 3 or "DS3" means the 44.736 Mbps third-level in the time-division multiplex hierarchy. In the time-division multiplexing hierarchy of the telephone network, DS3 is defined as the third level of multiplexing.

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

  • Day-ahead Scheduling Reserves Requirement means the sum of Base Day-ahead Scheduling Reserves Requirement and Additional Day-ahead Scheduling Reserves Requirement.

  • Deactivation Avoidable Cost Credit means the credit paid to Generation Owners pursuant to Tariff, Part V, section 114.

  • Maximum design heat input means the ability of a unit to combust a stated maximum amount of fuel per hour on a steady state basis, as determined by the physical design and physical characteristics of the unit.

  • Three-Month Term SOFR Conventions means any determination, decision or election with respect to any technical, administrative or operational matter (including with respect to the manner and timing of the publication of Three-Month Term SOFR, or changes to the definition of “interest period,” timing and frequency of determining Three-Month Term SOFR with respect to each interest period and making payments of interest, rounding of amounts or tenors, and other administrative matters) that the Calculation Agent decides may be appropriate to reflect the use of Three-Month Term SOFR as the Benchmark in a manner substantially consistent with market practice (or, if the Calculation Agent decides that adoption of any portion of such market practice is not administratively feasible or if the Calculation Agent determines that no market practice for the use of Three-Month Term SOFR exists, in such other manner as the Calculation Agent determines is reasonably necessary).

  • Modified Following Business Day Convention means that the relevant date shall be postponed to the first following day that is a Business Day unless that day falls in the next calendar month in which case that date will be the first preceding day that is a Business Day;

  • utility structure means transmission and distribution lines

  • Three-Month Term SOFR means the rate for Term SOFR for a tenor of three months that is published by the Term SOFR Administrator at the Reference Time for any Floating Interest Period, as determined by the Calculation Agent after giving effect to the Three-Month Term SOFR Conventions.

  • Deactivation Avoidable Cost Rate means the formula rate established pursuant to Tariff, Part V, section 115 of this Tariff.

  • Peak flow rate means the maximum instantaneous flow from a given storm condition at a particular location.

  • AMPS Basic Maintenance Amount, as of any Valuation Date, means the dollar amount equal to (i) the sum of (A) the product of the number of shares of AMPS and Other AMPS Outstanding on such Valuation Date multiplied by the sum of (a) $25,000 and (b) any applicable redemption premium attributable to the designation of a Premium Call Period; (B) the aggregate amount of cash dividends (whether or not earned or declared) that will have accumulated for each share of AMPS and Other AMPS Outstanding, in each case, to (but not including) the end of the current Dividend Period that follows such Valuation Date in the event the then current Dividend Period will end within 49 calendar days of such Valuation Date or

  • Service Level Agreement (SLA) means the Contractual Commitment that prevails between the Buyer and the Service Provider with regard to type of service to be provided, deliverables, desired performance level, reliability and responsiveness, monitoring process and service level reporting, response and issue resolution time-frame, repercussions / penalties / remedies for service provider not meeting its commitment. The SLA of a particular contract may carry the matrix regarding the delivery of the goods and/or services and the corresponding penalties or remedies and liquidated damages as applicable.