Week 7: Thermal Comfort✅ Flashcards
What is the main goal of the WELL Thermal Comfort concept?
THERMAL COMFORT > General
The WELL Thermal Comfort concept aims to promote human productivity and provide maximum thermal comfort through improved HVAC system design and control, meeting individual thermal preferences.
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This information comes from Page 159-160 of the WELL V2
How is thermal comfort defined?
THERMAL COMFORT > General
Thermal comfort is defined as the “condition of mind that expresses satisfaction with the thermal environment” and is assessed through subjective evaluation.
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This information comes from Page 159-160 of the WELL V2
What percentage of U.S. office buildings met thermal satisfaction goals, and what percentage of workers expressed dissatisfaction?
THERMAL COMFORT > General
Only 11% of U.S. office buildings met thermal satisfaction goals, while 41% of office workers expressed dissatisfaction with their thermal environment.
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This information comes from Page 159-160 of the WELL V2
What is the impact of thermal discomfort on productivity in hot and cold conditions?
THERMAL COMFORT > General
Employees perform 15% poorer in hot conditions and 14% poorer in cold conditions compared to those satisfied with the thermal environment.
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This information comes from Page 159-160 of the WELL V2
Why is a one-size-fits-all approach to thermal comfort ineffective?
THERMAL COMFORT > General
A one-size-fits-all approach fails because thermal comfort is subjective, and individual preferences vary, making it difficult to satisfy all occupants with uniform conditions.
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This information comes from Page 159-160 of the WELL V2
What is the intent of the T01 Thermal Performance feature?
T01 THERMAL PERFORMANCE | PRECONDITION
To provide a thermal environment that the majority of building users find acceptable, supporting their health, well-being, and productivity.
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This information comes from Page 161-163 of the WELL V2
What percentage of a building’s energy consumption is typically used for heating and cooling?
T01 THERMAL PERFORMANCE | PRECONDITION
In many countries, heating and cooling account for approximately half of a building’s energy consumption.
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This information comes from Page 161-163 of the WELL V2
What health issues are linked to overly warm indoor spaces?
T01 THERMAL PERFORMANCE | PRECONDITION
Overly warm spaces are linked to sick building syndrome symptoms, irregular heart rate, respiratory issues, fatigue, and negative mood.
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This information comes from Page 161-163 of the WELL V2
How does the thermal environment affect cold work environments?
T01 THERMAL PERFORMANCE | PRECONDITION
Cold work environments increase effort in maintaining posture and raise the risk of chronic musculoskeletal issues.
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This information comes from Page 161-163 of the WELL V2
What are the six core parameters of thermal comfort in mechanically conditioned spaces?
T01 THERMAL PERFORMANCE | PRECONDITION
The six core parameters are air temperature, humidity, air movement, mean radiant temperature, metabolic rate, and clothing insulation.
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This information comes from Page 161-163 of the WELL V2
What are the thermal comfort conditions for mechanically conditioned spaces in Option 1?
T01 | Part 1 Provide Acceptable Thermal Environment
PMV range of ”+/-“0.5 for at least 90% of occupied hours in at least 90% of regularly occupied spaces or PMV range of ”+/-“1.0 for at least 98% of occupied hours in at least 95% of regularly occupied spaces.
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This information comes from Page 161-163 of the WELL V2
What are the acceptable indoor operative temperature ranges for naturally conditioned spaces?
T01 | Part 1 Provide Acceptable Thermal Environment
Minimum: t x 0.31 + 47.9 oF (14.3 oC), Maximum: t x 0.31 + 60.5 oF (16 oC), where t is the prevailing mean outdoor temperature.
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This information comes from Page 161-163 of the WELL V2
What is the air velocity requirement for spaces using dry bulb temperature in Option 2?
T01 | Part 1 Provide Acceptable Thermal Environment
The designed air velocity must not exceed 40 fpm (0.2 m/s) at 5.6 ft (1.7 m) above the floor.
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This information comes from Page 161-163 of the WELL V2
What temperature limit is required for commercial kitchen spaces?
T01 | Part 1 Provide Acceptable Thermal Environment
The operative temperature in commercial kitchens must not exceed 80 oF (27 oC).
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This information comes from Page 161-163 of the WELL V2
What additional requirement must multifamily residential projects meet to achieve Gold or Platinum WELL Certification?
T01 | Part 1 Provide Acceptable Thermal Environment
They must conduct thermal testing in dwelling units as part of the certification process.
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This information comes from Page 161-163 of the WELL V2
What thermal parameters must be monitored under Option 1 for annual testing?
T01 | Part 2 Monitor Thermal Parameters
Dry-bulb temperature, relative humidity, air speed (if elevated air speed method is used), and mean radiant temperature must be monitored at least twice a year.
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This information comes from Page 161-163 of the WELL V2
When must annual testing take place for thermal parameters in Option 1?
T01 | Part 2 Monitor Thermal Parameters
Once in June, July, or August and once in December, January, or February.
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This information comes from Page 161-163 of the WELL V2
What compliance is required for the number and location of sampling points in Option 1?
T01 | Part 2 Monitor Thermal Parameters
Sampling points must comply with the requirements outlined in the Performance Verification Guidebook.
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This information comes from Page 161-163 of the WELL V2
What is the requirement for continuous monitoring in Option 2?
T01 | Part 2 Monitor Thermal Parameters
The project must meet Feature T06: Thermal Comfort Monitoring.
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This information comes from Page 161-163 of the WELL V2
Where must these monitoring requirements be met according to WELL Core Guidance?
T01 | Part 2 Monitor Thermal Parameters
They must be met in non-leased spaces.
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This information comes from Page 161-163 of the WELL V2
What percentage of occupants must be satisfied with the thermal environment to meet WELL standards?
T02 VERIFIED THERMAL COMFORT | OPTIMIZATION
At least 80% of occupants must be satisfied with the thermal environment.
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This information comes from Page 164-165 of the WELL V2
What method is used to determine occupant satisfaction with thermal comfort?
T02 VERIFIED THERMAL COMFORT | OPTIMIZATION
Occupant satisfaction is determined through a thermal comfort survey.
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This information comes from Page 164-165 of the WELL V2
What percentage of office workers have expressed dissatisfaction with their thermal environment according to studies?
T02 VERIFIED THERMAL COMFORT | OPTIMIZATION
As many as 41% of office workers have expressed dissatisfaction with their thermal environment.
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This information comes from Page 164-165 of the WELL V2
What are the benefits of thermal comfort satisfaction in the workplace?
T02 VERIFIED THERMAL COMFORT | OPTIMIZATION
Thermal comfort satisfaction is linked to increased productivity and reduced sick building syndrome symptoms.
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This information comes from Page 164-165 of the WELL V2