[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-445023-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-445023-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","effect-of-ceiling-fans-on-core-temperature-in-bed-resting-older-adults-exposed-to-indoor-overheating","Effect of Ceiling Fans on Core Temperature in Bed-Resting Older Adults Exposed to Indoor Overheating","","Rising indoor temperatures elevate heat-overheating risks, especially for older adults who are bed-resting. Electric fans are commonly recommended up to 40°C, yet evidence for ceiling-fan performance at very warm conditions around 31°C is limited. This randomized crossover study tested whether ceiling fans reduce core temperature and cardiovascular strain during 8-hour exposures to simulated indoor overheating (31°C, 45% RH).",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & Report",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/effect-of-ceiling-fans-on-core-temperature-in-bed-resting-older-adults-exposed-to-indoor-overheating/445023/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/effect-of-ceiling-fans-on-core-temperature-in-bed-resting-older-adults-exposed-to-indoor-overheating/445023.png","ImageObject",300,407,{"name":42,"@type":43},"jayni","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-09-30","2026-09-29",true,{"@type":52,"interactionType":53,"userInteractionCount":22},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"What was the study’s primary goal?","Question",{"text":62,"@type":63},"To evaluate whether ceiling fans reduce peak core temperature and cardiovascular strain during simulated indoor overheating in bed-resting older adults.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"How were ceiling fans tested in the study?",{"text":67,"@type":63},"Participants completed two randomized 8-hour exposures at 31°C and 45% relative humidity with ceiling-fan air speeds set to 0 m/s (control) or about 1.5 m/s (fan condition).",{"name":69,"@type":60,"acceptedAnswer":70},"Did ceiling fans fully prevent heat-related physiological strain?",{"text":71,"@type":63},"No. Fan use significantly lowered heat-related strain measures, but it did not fully ameliorate heat-induced physiological strain under the tested conditions.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},445023,1790764485,{"code":4,"msg":81,"data":82},"success",[83,87,91,95,100,105,110,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":88,"show_sort_weight":89,"slug":90},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":92,"show_sort_weight":93,"slug":94},"Exam",70,"exam",{"id":96,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},5,"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":102,"show_sort_weight":103,"slug":104},6,"Technology",50,"technology",{"id":106,"doc_module":4,"doc_module_name":25,"category_name":107,"show_sort_weight":108,"slug":109},7,"Healthcare",40,"healthcare",{"id":111,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":112,"slug":113},8,30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":96,"slug":129},19,"General","general",{"code":4,"msg":81,"data":131},{"doc_id":78,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":111,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":22,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":96,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":143,"read_time":144},3985747859343,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Journal of the American Geriatrics Society Journal of the  \nAmerican Geriatrics Society  \nEffect of Ceiling Fans on Core Temperature in Bed-Resting Older Adults Exposed to Indoor Overheating  \nFergus K. O'Connor1,2  | Robert D. Meade1,3 | Kristina-Marie T. Janetos1 | Caroline Li-Maloney1 | Ronald J. Sigal1,4,5,6,7 | Pierre Boulay8 | Glen P. Kenny1,7   \n1Human and Environmental Physiology Research Unit, School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada | 2School of Health Sciences and Social Work, Griffith University, Southport, Queensland, Australia | 3Department of Epidemiology, T.H.  \nChan School of Public Health, Harvard University, Boston, Massachusetts, USA | 4Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada | 5Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta,  \nCanada | 6Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada | 7Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canada | 8Faculty of Physical Activity Sciences, University of Sherbrooke, Sherbrooke, Quebec, Canada  \nCorrespondence: Glen P. Kenny ([gkenny@uottawa.ca](gkenny@uottawa.ca))  \nReceived: 25 June 2025 | Revised: 7 August 2025 | Accepted: 14 August 2025  \nFunding: This work was supported by Health Canada (4500387992) and Canadian Institutes of Health Research (PJT-180242) .  \nKeywords: extreme heat event | heat stress | sustainable cooling | thermoregulation  \nABSTRACT  \nBackground: Rising global temperatures have increased indoor overheating risks, posing significant health threats to vulnerable populations, particularly older adults. While electric fans are recommended for cooling at temperatures up to 40°C, the efficacy of ceiling fans in very warm indoor temperatures (~31°C) remains understudied. This randomized study evaluated the efficacy of ceiling fans in reducing core temperature and cardiovascular strain among bed-resting adults exposed to simulated indoor overheating (31°C, 45% relative humidity) for 8 h.  \nMethods: Twenty participants (12 females, median [IQR] age: 71 [68–73] years) underwent two experimental exposures with a ceiling fan set at either 0 m/s (control) or ~1.5 m/s (fan condition) .  \nResults: The primary outcome, peak core temperature, was significantly lowered by 0.2 [95% CI: 0.1–0.3]°C (0.4 [0.2–0.5]°F, p \u003C 0.001) with fan use (mean [SD]) 37.6 [0.2]°C (99.7 [0.4]°F); +0.9 [0.3]°C (+1.6 [0.5]°F) vs. pre-exposure) compared to control (37.8 [0.2]°C (100.0 [0.4]°F); +1.1 [0.5]°C (+2.0 [0.9]°F) vs. pre-exposure) . Secondary outcomes, including core temperature area under the curve, peak and end-exposure heart rate, fluid consumption, and thermal discomfort, were also reduced significantly with fan use. Despite these improvements, fan use did not completely ameliorate heat-induced physiological strain. Conclusions: These findings indicate that while ceiling fans significantly reduce heat-related physiological strain under the conditions tested, they are not wholly efficacious as standalone cooling solutions. A combined “fan-first” approach, integrating fans with ambient cooling strategies, may enhance heat–health protection in older adults.  \nClinicalTrials.Gov Identifier: NCT06142890  \n1 | Introduction  \nRising global temperatures are increasing the incidence of indoor overheating and accompanying health risks [1], with older  \nadults (≥65years) and those living alone or confined to bed most at risk [2] . While electric fans are recommended in air temperatures up to 40°C [3], studies utilizing pedestal fans at 36°C–38°C (96.8°F–100.4°F) have reported only minor, non-clinically  \nThis is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the us","cbCaisHSSweAfHPk","https://ap.wps.com/l/cbCaisHSSweAfHPk","pdf",1009337,"English","# Abstract\n## Background\n## Methods\n## Results\n## Conclusions\n# Introduction\n# Methods","[{\"question\":\"What was the study’s primary goal?\",\"answer\":\"To evaluate whether ceiling fans reduce peak core temperature and cardiovascular strain during simulated indoor overheating in bed-resting older adults.\"},{\"question\":\"How were ceiling fans tested in the study?\",\"answer\":\"Participants completed two randomized 8-hour exposures at 31°C and 45% relative humidity with ceiling-fan air speeds set to 0 m/s (control) or about 1.5 m/s (fan condition).\"},{\"question\":\"Did ceiling fans fully prevent heat-related physiological strain?\",\"answer\":\"No. Fan use significantly lowered heat-related strain measures, but it did not fully ameliorate heat-induced physiological strain under the tested conditions.\"}]","Effect of Ceiling Fans on Core Temperature in Bed-Resting Older Adults Exposed to Indoor Overheating | PDF",1790710084,13]