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WELL AP v1_ LP > Comfort Concept > Flashcards

Comfort Concept Flashcards

1
Q

The sound pressure limits of the octave band spectra ranging from 63 Hz to 8000 Hz.

A

Noise criteria (NC)

Specificano ovvero i livelli massimi di rumore che possono essere presenti in ogni banda di ottava

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2
Q

Total # of days of work missed due to Musculoskeletal disorders - back pain, neck pain, osteoarthritis, carpal tunnel etc.

A

380,600 days makes up 1/3 of total days absent

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3
Q

An independent, non-governmental international organization that develops consensus-based, market-relevant standards for worldwide use.

A

International Organization for Standardization (ISO)

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4
Q

The pressure variation associated with sound waves, usually measured in decibels (dB). Also known as acoustic pressure.

A

Sound Pressure Level

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5
Q

A laboratory method for determining sound transmission through a wall.

A

Sound transmission class (STC)

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6
Q

The average value that determines the absorptive properties of materials.

A

Noise reduction coefficient (NRC)

the higher the better it can absorb sound

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7
Q

Leading source of dissatisfaction with office conditions?

A

acoustic problems

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8
Q

How many people worldwide have Lower back pain?

A

31 mln of Americans (7% of population)

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9
Q

Thermal comfort - only ___% of buildings met occupant satisfaction

A

11%

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10
Q

F72 - Accessible Design (Accessibility and Usability)

All projects have to comply with ___or_____?

A

ADA (American Disability Act) Standards for Accessible Design

or

ISO 21542:2011, Building Construction - Accessibility of Built environment

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11
Q

F73 - Ergonomics Visual and Physical (Visual ergonomics, Desk Height Flexibility, Sit Flexibility)

p1 - Monitor must be adjustable for___ and____(2)

p2 - Requires that at least ___% of workstations have the ability to alternate between sitting and standing positions.

p3 - Chair height and seat depth are adjustable and compliant with ____.

A

p1 - height and distance from the user

p2 - 30%

p3 - HFES 100 or BIFMA G1

Benefetis on Musculoskeletal and nervous systems

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12
Q

F74 - Exterior Noise Intrusion (Sound Pressure Levels)

With empty spaces and within 1 hour of normal business hours, exterior noise intrusion does not exceed ___dBA

A

50 dBA → empty space → 1 hour normal business

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13
Q

75 - Internally Generated Noise (Acoustic Planning, Mechanical Equipment Sound Levels)

p1- Acoustic Plan identifies ___ and ___.

p2- Max noise from HVAC in spaces: Teleconference rooms___ Conference Rooms___ Enclosed Offices___ Open Offices ____

A

p1-
loud and quiet zones and noisy equipment

p2-

  • Teleconference rooms < 20 NC (Noise Criteria)
  • Conference Rooms < 30 NC
  • Enclosed Offices < 35 NC
  • Open Offices and lobby < 40 NC
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14
Q

F76 - Thermal Comfort (Ventilated Thermal, Natural Thermal Adaptation)

p1 - Mechanically ventilated projects must meet criteria under ____.

p2 - Naturally conditioned projects must meet criteria under ____.

A

ASHRAE 55-2013 Section 5.3 Standard Comfort Zone

ASHRAE 55-2013 Section 5.4 Adaptive Comfort Model

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15
Q

What is Homeothermy?

A

Homeothermy is the balancing of heat gains and losses to maintain the bodys core temperature within a narrow range between 97-100

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16
Q

F77 - Olfactory Comfort

Health risk odors?

A
  • headaches
  • eye and nasal discomfort
  • nausea
  • physical and psychological discomfort
  • decrease productivity and lower occupan well-being
17
Q

F77 - Olfactory Comfort (Source Separation)

p1- All restrooms and pantries, janitorial closets, kitchens, cafeterias, use these 5 methods to keep odors from migrating:

A
  • negative pressurization
  • self-closing doors
  • vestibules
  • hallways (corridoi)
  • other intermediate rooms
18
Q

F78 - Reverberation time

RT60 is ___. What is it for conference rooms and open office spaces?

A

the time it takes for sound level to decrease 60 dB

  1. 6 sec conference rooms
  2. 5 sec open office spaces
19
Q

F79 - Sound Masking (Use, Limits)

p1 - p2 - Speakers emit low-level background noise (White noise) and it is measured at ____dBA in open workspaces and ___ dBA in enclosed offices

A

45-48 dBA in open office workspaces

40-42 dBA in enclosed offices

It improves Immune and nervous systems

20
Q

F80 - Sound Reducing Surfaces (Ceilings, Vertical Surface)

p1- Ceilings has____NRC in open workspaces and ___ NRC in conference and teleconference rooms

p2- Vertical Surface has____NRC in open/partitioned workspaces and ___ NRC in enclosed offices, conference and teleconference

A

p1-
Ceilings

  • Open workspace > 0,9 NRC for all ..
  • Conference > 0,8 NRC for 50% …

…excluding lights, skylights, diffusers, and grilles

p2-
Vertical Surface

  • Open > 0.8 NRC on 25% with height of the partion > 1,2 m
  • Enclosed > 0.8 NRC on 25% surfaces

NRC = Noise Reduction Coefficient (proprietà assorbenti di un materiale o panello)

21
Q

F81 - Sound Barriers (Wall Constr. Specification, Doorway, Wall Constr. Methodology)

p1 - Wall specs ___ STC for:

  • Enclosed office with masking
  • Enclosed office with no masking
  • Conference room

p2 - Three possible strategies to reduce noise through doorways (3)

p3 - Three possible construction metodologies to reduce noise through walls (3)

A

p1-

  • > 40 STC with
  • > 45 STC without
  • > 53 STC conference

p2-

  • Gaskets (guarnizioni)
  • Sweeps (spazza porte)
  • Nonhollow cores (contropannelli)

p3-

  • sealing acoustically at the top and bottom (sigillamento acustico)
  • sealing all penetrations
  • staggering board seams (sfalsare cuciture)

STC - Sound Transmission Class is a laboratory method for determining the sound transmissione through wall

22
Q

F82 - Individual Thermal Comfort (Free address, Personal Thermal Comfort Devices)

For projects over ___ m2 :

p1- A - Provide a thermal gradient of at least___ across work spaces and between floor and rooms with more than___.

p1- B - ___% free address for occupants performing task with similar workstations

p2- Employees have access to fans and heaters when there are more than ___ workstations in the same heating/cooling (HVAC) zone.

A

p1-
> 200 m2

A
at least 3°C with more than 10 occupants
B
50% free address

p2-
10

thermal gradient = variazioni di temperatura

free address = choose their own work space in the office

23
Q

F83 - Radiant Thermal (Lobbies, Office and Occupied spaces)

Hydronic and Electric Radiant system, what are the 4 benefits?

p1 - p2 - What standard? Hydronic and Electric Radiant systems, which 2 spaces are covered?

A

Benefits:

  • saved floor space
  • lower dust transportation
  • higher winter humidity
  • mean radiant temperature can be kept lower compared to convective heating (temperatura media radiante può essere mantenuta più bassa rispetto al convettivo)

p1-2
ASHRAE 55-2013

  • Lobbies/Common areas (elevators, stairs….) 100%
  • ​Offices / Spaces regurarly occupied > 50%
24
Q

Disability Adjusted Life for muscoloskeletal disorders

A

7%

25
Q

ASHRAE Standard 55-2013 specifies 6 factors for thermal comfort__?

A
  1. Metabolic rate (calore attività metabolica)
  2. Clothing insulation
  3. Air speed
  4. Air temperature
  5. Radiant temperature (surfaces temperatures)
  6. Humidity
26
Q

Graphical representations of the properties of air at various thermal comfort condition

A

Psychrometric charts

27
Q

Exposure to traffic noise have a higher risk for (3)_____, and exposure to road traffic and aircraft noises have a higher risk for (1) ___.

A
  • Diabetes
  • Strokes (ictus)
  • Heart attacks
  • Hypertension
28
Q

Health risk for interior noise (3)?

A
  • Distractions
  • Decreased sense of privacy
  • Lower productivity

WELL AP v1_ LP (25 decks)

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