{"id":18375,"feature_order":1,"feature_code":null,"name":"Thermal Performance","type":"P","intent":"Provide a thermal environment that the majority of building users find acceptable.","intervention":"

\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n<\/p>This WELL feature requires projects to create indoor thermal environments that provide comfortable thermal conditions to the majority of people in support of their health, well-being and productivity.1,2<\/sup>   
","issue":"

The thermal environment substantially impacts a building's energy footprint, since in many countries heating and cooling account for approximately half of a building\u2019s energy consumption.3,4<\/sup> Furthermore, the indoor thermal environment is ranked as one of the strongest contributing factors to overall human satisfaction in the built environment.5<\/sup> The thermal environment not only impacts comfort and productivity, but due to its linkages to integumentary, endocrine and respiratory body systems, thermal comfort can also cause a variety of detrimental health outcomes.1,6<\/sup> Overly warm indoor spaces are linked to increases in sick building syndrome symptoms, irregular heart rate, respiratory issues, fatigue and negative mood.7<\/sup> Cold work environments have been linked to increased effort and work towards maintaining proper posture and increased risk for chronic issues related to musculoskeletal health.8<\/sup><\/o:p><\/p>","evidence":"

Thermal comfort standards utilize a model that provides a means of predicting whether humans in a mechanically conditioned space will be satisfied with the thermal environment based on six core parameters: air temperature, humidity, air movement, mean radiant temperature of surrounding surfaces, metabolic rate and clothing insulation.9,10 <\/sup>For naturally conditioned buildings, the adaptive thermal comfort model correlates human comfort directly with indoor operative temperature and outdoor temperature.11,12<\/sup> Achieving thermal satisfaction among people requires some level of control over thermal comfort parameters in any given environment.<\/o:p><\/p>","implementation":"","impact":"","max_points":0,"concept_id":1738,"slug":"thermal-performance","gbd_exists":null,"review_summary":null,"citations":"

  1. Mendell MJ, Fisk WJ, Kreiss K, et al. Improving the health of workers in indoor environments: Priority research needs for a National Occupational Research Agenda. Am J Public Health. 2002;92(9):1430-1440. doi:10.2105\/AJPH.92.9.1430<\/li>
  2. Fisk WJ. How IEQ affects health, productivity. ASHRAE J. 2002;44(5). http:\/\/doas-radiant.psu.edu\/fisk.pdf.<\/li>
  3. Chua KJ, Chou SK, Yang WM, Yan J. Achieving better energy-efficient air conditioning - A review of technologies and strategies. Appl Energy. 2013;104:87-104. doi:10.1016\/j.apenergy.2012.10.037<\/li>
  4. P\u00e9rez-Lombard L, Ortiz J, Pout C. A review on buildings energy consumption information. Energy Build. 2008;40(3):394-398. doi:10.1016\/j.enbuild.2007.03.007<\/li>
  5. Frontczak M, Wargocki P. Literature survey on how different factors influence human comfort in indoor environments. Build Environ. 2011;46(4):922-937. doi:10.1016\/j.buildenv.2010.10.021<\/li>
  6. Stefano Schiavon RZ. Indoor Climate and Productivity in Offices. Berkeley, CA: Federatin of European Heating, Ventilation and Air Conditioning Associations; 2008. https:\/\/www.rehva.eu\/eshop\/detail\/no06-indoor-climate-and-productivity-in-offices.<\/li>
  7. Lan L, Wargocki P, Wyon DP, Lian Z. Effects of thermal discomfort in an office on perceived air quality, SBS symptoms, physiological responses, and human performance. Indoor Air. 2011;21(5):376-390. doi:10.1111\/j.1600-0668.2011.00714.x<\/li>
  8. Cheung SS, Lee JKW, Oksa J. Thermal stress, human performance, and physical employment standards. Appl Physiol Nutr Metab. 2016;41(6):S148-S164. doi:10.1139\/apnm-2015-0518<\/li>
  9. Fanger PO, Fanger PO. Thermal Comfort: Analysis and Applications in Environmental Engineering. Danish Technical Press; 1970. https:\/\/books.google.com\/books\/about\/Thermal_Comfort.html?id=S0FSAAAAMAAJ.<\/li>
  10. De Dear R. Thermal comfort in practice. Indoor Air, Suppl. 2004;14(SUPPL. 7):32-39. doi:10.1111\/j.1600-0668.2004.00270.x<\/li>
  11. Mora R, Bean R. Thermal comfort: Designing for people. ASHRAE J. 2018;60(2):40-46.<\/li>
  12. American Society of Heating Refrigerating and Air-Conditioning Engineers. ASHRAE 55-2020: Thermal Environmental Conditions for Human Occupancy. 2021. https:\/\/www.techstreet.com\/ashrae\/standards\/ashrae-55-2020?product_id=2207271.<\/li>
  13. Green Building Council of Australia. Greenstar: Design & As Built. 2019. https:\/\/new.gbca.org.au\/rate\/rating-system\/design-and-built\/.<\/li>
  14. NABERS. NABERS Indoor Environment for Offices: Rules for Collecting and Using Data. 2015. https:\/\/www.nabers.gov.au.<\/li><\/ol>","deleted_at":null,"equivalency_count":21,"faq_count":2,"resource_count":1,"feature_full_name":"T01 Thermal Performance","feature_faq_name":"T01 Thermal Performance-v2","max_core_points":0,"parts":[{"id":30735,"name":"Provide Acceptable Thermal Environment","part_number":1,"points":0,"possible_points":null,"core_points":0,"possible_core_points":null,"min_points":0,"rer_points":0,"wor_points":0,"parent_part_id":null,"feature_id":18375,"note":"

    Multifamily residential projects may achieve WELL Certification at the Bronze or Silver level without testing in dwelling units, but cannot achieve Gold or Platinum without testing in dwelling units. See Sampling Rates for Multifamily Residential in the WELL Performance Verification Guidebook for further details.<\/p>\r\n\r\n

    Refer to the Performance Verification Guidebook for information on sensor\/testing requirements, required testing duration and compliance calculations.<\/p>","slug":"1-provide-acceptable-thermal-environment-12","note_position_override":"bottom","new_core_shell":null,"existing_core_shell":null,"new_occupied":null,"existing_occupied":null,"education":null,"retail":null,"mfr":null,"others":null,"photographic_verification":0,"gbd_exists":0,"hospitality":null,"assisted_living":null,"cultural_institutions":null,"public_assembly":null,"deleted_at":null,"na_alternative":0,"na_alternative_text":null,"leed_well":0,"part_prefix":"T01.1","feature_name":"Thermal Performance","parent":null,"sub_parts":[{"id":33040,"condition":"OR","part_id":30735,"deleted_at":null,"space_types_included":[{"id":1,"name":"All Spaces","name_plural":"all"}],"space_types_excluded":[{"id":2,"name":"Commercial Kitchen Spaces","name_plural":"commercial kitchen"}],"options":[{"id":41959,"option_order":1,"name":"Performance verified environmental conditions","description":"

    The following requirements are met, as applicable:<\/p>","description_alt":null,"space_property":null,"certification":null,"note":"

    Spaces with multiple occupant types may use the occupant characteristics of PMV—metabolic rate and clothing value—for the majority occupant type (e.g., a space with 30 diners and 5 servers may use the diners' metabolic rates and clothing values to determine the PMV for that space).<\/p>","sub_part_id":33040,"deleted_at":null,"note_position_override":"bottom","verification_note":"

    Technical document: A report that covers the following:<\/p>\r\n\r\n