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WELL AP > Air : 19-21 (Optimisation) > Flashcards

Air : 19-21 (Optimisation) Flashcards

1
Q

What is DOAS?

A

Dedicated Outdoor Air System

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2
Q

What is the role of a DOAS?

A

Provides 100% outdoor air to a building’s zones for ventilation purposes

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3
Q

What are the benefits of a DOAS?

A
  • Increased air filtration
  • Increased energy efficiency
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4
Q

What is Feature 19?

A

Operable Windows

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5
Q

What project types does Feature 19 (Operable Windows) apply to?

A

All

  • NEB
  • NEI
  • C&S
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6
Q

Natural ventilation effectiveness is affected by?

A
  • Climatic conditions
  • Outdoor air pollution levels
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7
Q

What are the 3 parts of Feature 19 (Operable Windows)?

A
  • Full Control
  • Outdoor Air Measurement
  • Window Operation Management
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8
Q

What is the strategy for Part 1 (Full Control) of Feature 19 (Operable Windows)?

A

Operable windows in every regularly occupied space

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9
Q

What are the strategies for Part 2 (Outdoor Air Measurement) for Feature 19 (Operable Windows)?

A
  • Outdoor-Air-Measurement Data Collection System
  • Readings of select parameters
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10
Q

What is the range of the Outdoor-Air-Measurement Data Collection System of Part 2 (Outdoor Air Measurement) of Feature 19 (Operable Windows)?

A

Within 1.6km of the building

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11
Q

What are the parameters for readings for Part 2 (Outdoor Air Measurement) of Feature 19 (Operable Windows)?

A
  • Ozone
  • PM10
  • Temperature
  • Humidity
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12
Q

What is the strategy for Part 3 (Window Operation Management) of Feature 19 (Operable Windows)?

A

Methods to discourage occupants from opening windows when readings from Part 2 (Outdoor Air Measurement) exceeds limits

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13
Q

What are the methods for Part 3 (Window Operation Management) of Feature 19 (Operable Windows)?

A
  • Software on computers or smartphones
  • Indicator lights on operable windows
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14
Q

What are the limits for Part 3 (Window Operation Management) of Feature 19 (Operable Windows)?

A
  • Ozone = <51 ppb
  • PM10 = <50 UG/m3
  • Temperature = +/- 8* of indoor temperature
  • Humidity = 60% relative humidity
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15
Q

What is Feature 20?

A

Outdoor Air Systems

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16
Q

What project types (NEB; NEI; C&S) does Feature 20 (Outdoor Air Systems) apply to?

17
Q

What are the strategies for Feature 20 (Outdoor Air Systems)?

A

Either

  • DOAS complying with local codes or standards for DOAS
  • Design review
18
Q

What are the parameters for a DOAS Design Review for Feature 20 (Outdoor Air System)?

A
  • Reviewed by a licensed mechanical engineer (M.E.)
  • Addresses
    • Thermal Comfort
    • Ventilation Rate requirements of Feature 3 (Ventilation Effectiveness)
    • System Serviceability and Reliability
19
Q

What is Feature 21?

A

Displacement Ventilation

20
Q

What project types (NEB; NEI; C&S) does Feature 21 (Displacement Ventilation) apply to?

21
Q

What are Displacement Ventilation Systems?

A

Low-velocity air supplied at a low level to displace warmer air that is then extracted at ceiling level

22
Q

What do Displacement Ventilation Systems help with?

A

Removal of pollutants concentrated towards the ceiling.

23
Q

What are the 2 types of Displacement Ventilation Systems?

A
  • Low Sidewall Air Distribution Systems
  • Underfloor Air Distribution Systems (UBAD)
24
Q

What are the parts for Feature 21 (Displacement Ventilation)?

A
  1. Displacement Ventilation Design and Application
  2. System Performance
25
What are the strategies for Part 1 (Displacement Ventilation Design and Application) of Feature 21 (Displacement Ventilation)?
* Displacement Ventilation Systems meeting minimum design standards * Raised floor height allow for underfloor area to be cleaned annually
26
What are the minimum design standards for **Low Sidewall AIr Distribution** systems of Part 1 (Displacement Ventilation Design and Application) of Feature 21 (Displacement Ventilation)?
* System Performance Evaluation * ASHRAE Guidelines RP-949
27
What is the design standard for UBAD systems of Part 1 (Displacement Ventilation Design and Application) of Feature 21 (Displacement Ventilation)?
ASHRAE UFAD guide
28
What is the strategy for Part 2 (System Performance) of Feature 21 (Displacement Ventilation)?
Meet 2 requirements
29
What are the 2 requirements for Part 2 (System Performance) of Feature 21 (Displacement Ventilation)?
* Must conduct a Computational Fluid Dynamics (CFD) analysis * 75% of regularly occupied spaces meet the thermal comfort requirements of ASHRAE Standard 55-2013
30
What is the ASHRAE standard for meeting Thermal Comfort requirements of Part 2 (System Performance) of Feature 21 (Displacement Ventilation)?
ASHRAE Standard 55-2013
31
What are features 19, 20 and 21?
* Feature 19 = Operable Windows * Feature 20 = Outdoor Air Systems * Feature 21 = Displacement Ventilation

WELL AP (17 decks)

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