Comfort Concept Flashcards
(31 cards)
How many features in Comfort?
12 features (#72-83) 5 preconditions (72-76) 7 Optimizations (77-83)
How many American have Lower back pain?
31 million
Leading source of dissatisfaction with office conditions?
acoustic problems
How many people worldwide have Lower back pain?
7% of population
Total # of days of work missed due to MSDs (musculoskeletal disorders) - back pain, neck pain, osteoarthritis, carpal tunnel etc.
380,600 days
makes up 1/3 of total days absent
Thermal comfort - only ___% of buildings met occupant satisfaction
11%
73 - Ergonomics (prerequisite)
all computer screens are adjustable plus,
___% of workstations change from sit to stand, and chair height and seat depth are adjustable and compliant with ____.
30%
HFES 100 or BIFMA G1
74 - Exterior Noise Intrusion
traffic noise increases risk for 4 things ___.
diabetes
stroke
heart attack
hypertension
74 - Exterior Noise Intrusion
Within 1 hour of normal business hours sound intrusion does not exceed ___dBA
50 dBA
How is Exterior Noise Verified?
Well Assessor does a Performance Test
75 - Internally Generated Noise
Accoustic Plan identifies ___ and ___.
loud and quiet zones
and
noisy equipment
Noise Criteria - max noise from HVAC in spaces: Teleconference rooms\_\_\_ Conference Rooms\_\_\_ Enclosed Offices\_\_\_ Open Offices \_\_\_\_
Noise Criteria - max noise in spaces: Teleconference rooms - 20 NC Conference Rooms - 30 NC Enclosed Offices - 35 NC Open Offices - 40 NC
76 - Thermal Comfort Part 1
Mechanically ventilated projects must meet criteria under ____.
ASHRAE 55-2013 section 5.3
Standard Comfort Zone compliance
76 - Thermal Comfort Part 2
Naturally ventilated projects must meet criteria under ____.
ASHRAE 55-2013 section 5.4
Adaptive Comfort Model
What is Homeothermy?
balancing of heat gain and loss to regulate core temp between 97-100
77 - Olfactory Comfort (keep interiors odorless)
Source separation - all restrooms, janitorial closets, kitchens, cafeterias and pantries use these 5 methods to keep odors from migrating:
- negative pressurization
- interstitial rooms
- vestibules
- hallways
- self-closing doors
Source separation is applicable to which WELL feature?
- Olfactory Comfort
What is Negative Pressurization? When the total CFM from supply air is ___(greater than or less than) return air, the room is under positive pressure and the air will flow out.
greater
- Reverberation time - RT60 is ___
the time it takes for sound level to decrease 60 dB
Sound-absorbing materials are used to reduce sound reverberation to ____seconds in open workspaces and ___ seconds in conference rooms
- 5 seconds in open workspaces and
0. 6 seconds in conference rooms
79 - sound masking (white noise)
speakers emit low-level background noise so sounds is measured at
____dBA in open workspaces and
___ dBA in enclosed offices
45-48 dBA in open workspaces and
40-42 dBA in enclosed offices
80 - Sound Reducing Surfaces (acoustical panels - Ceilings)
____NRC in open workspaces and
___ NRC in enclosed offices
Ceilings:
- 9+ NRC entire surface in open workspaces and
- 8+ NRC 50% of ceiling in enclosed offices
80 - Sound Reducing Surfaces (acoustical panels - Walls)
____NRC in open workspaces/enclosed offices/conference rooms and
___ NRC in cubicles/partitioned spaces
Walls:
- 8+ NRC on 25%+ walls in open workspaces and
- 8+ NRC at least 48” high in cubicles
What is NRC?
Is a higher or lower number better?
Noise Reduction Coefficient - measures absorptive properties - the higher the number the better it can absorb sound
