{"id":45,"date":"2013-04-03T08:44:58","date_gmt":"2013-04-03T12:44:58","guid":{"rendered":"http:\/\/firealarmsboston.com\/?page_id=45"},"modified":"2014-08-07T08:01:03","modified_gmt":"2014-08-07T12:01:03","slug":"duct-detectors","status":"publish","type":"page","link":"https:\/\/www.firealarmsboston.com\/?page_id=45","title":{"rendered":"Duct Detectors"},"content":{"rendered":"<p><strong>Duct detectors are devices installed on ventillation systems ducts that detect the presence of smoke and send out a trouble signal when activated, while shutting down the hvac unit the duct is attached to. In the past these units used to generate alarms, but due to high false alarms, they now are required to send troubles.<\/strong><\/p>\n<figure id=\"attachment_96\" aria-describedby=\"caption-attachment-96\" style=\"width: 250px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/DNRHS.jpg\"><img loading=\"lazy\" class=\"size-full wp-image-96\" alt=\"Duct Detector\" src=\"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/DNRHS.jpg?resize=250%2C250\" width=\"250\" height=\"250\" srcset=\"https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/DNRHS.jpg?w=250&amp;ssl=1 250w, https:\/\/i0.wp.com\/www.firealarmsboston.com\/wp-content\/uploads\/2013\/04\/DNRHS.jpg?resize=150%2C150&amp;ssl=1 150w\" sizes=\"(max-width: 250px) 100vw, 250px\" data-recalc-dims=\"1\" \/><\/a><figcaption id=\"caption-attachment-96\" class=\"wp-caption-text\">Duct Detector<\/figcaption><\/figure>\n<div class=\"sharedaddy sd-sharing-enabled\"><div class=\"robots-nocontent sd-block sd-social sd-social-icon-text sd-sharing\"><h3 class=\"sd-title\">Share this:<\/h3><div class=\"sd-content\"><ul><li class=\"share-print\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-print sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45\" target=\"_blank\" title=\"Click to print\"><span>Print<\/span><\/a><\/li><li class=\"share-facebook\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-facebook-45\" class=\"share-facebook sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=facebook\" target=\"_blank\" title=\"Click to share on Facebook\"><span>Facebook<\/span><\/a><\/li><li class=\"share-linkedin\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-linkedin-45\" class=\"share-linkedin sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=linkedin\" target=\"_blank\" title=\"Click to share on LinkedIn\"><span>LinkedIn<\/span><\/a><\/li><li class=\"share-twitter\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-twitter-45\" class=\"share-twitter sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=twitter\" target=\"_blank\" title=\"Click to share on Twitter\"><span>Twitter<\/span><\/a><\/li><li class=\"share-pinterest\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-pinterest-45\" class=\"share-pinterest sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=pinterest\" target=\"_blank\" title=\"Click to share on Pinterest\"><span>Pinterest<\/span><\/a><\/li><li><a href=\"#\" class=\"sharing-anchor sd-button share-more\"><span>More<\/span><\/a><\/li><li class=\"share-end\"><\/li><\/ul><div class=\"sharing-hidden\"><div class=\"inner\" style=\"display: none;\"><ul><li class=\"share-reddit\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-reddit sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=reddit\" target=\"_blank\" title=\"Click to share on Reddit\"><span>Reddit<\/span><\/a><\/li><li class=\"share-tumblr\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-tumblr sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=tumblr\" target=\"_blank\" title=\"Click to share on Tumblr\"><span>Tumblr<\/span><\/a><\/li><li class=\"share-end\"><\/li><li class=\"share-pocket\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-pocket sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=pocket\" target=\"_blank\" title=\"Click to share on Pocket\"><span>Pocket<\/span><\/a><\/li><li class=\"share-end\"><\/li><\/ul><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Duct detectors are devices installed on ventillation systems ducts that detect the presence of smoke and send out a trouble signal when activated, while shutting down the hvac unit the duct is attached to. In the past these units used to generate alarms, but due to high false alarms, they now are required to send &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.firealarmsboston.com\/?page_id=45\" class=\"read-more\">Read More<span class=\"screen-reader-text\"> &#8220;Duct Detectors&#8221;<\/span><\/a><\/p>\n<div class=\"sharedaddy sd-sharing-enabled\"><div class=\"robots-nocontent sd-block sd-social sd-social-icon-text sd-sharing\"><h3 class=\"sd-title\">Share this:<\/h3><div class=\"sd-content\"><ul><li class=\"share-print\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-print sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45\" target=\"_blank\" title=\"Click to print\"><span>Print<\/span><\/a><\/li><li class=\"share-facebook\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-facebook-45\" class=\"share-facebook sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=facebook\" target=\"_blank\" title=\"Click to share on Facebook\"><span>Facebook<\/span><\/a><\/li><li class=\"share-linkedin\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-linkedin-45\" class=\"share-linkedin sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=linkedin\" target=\"_blank\" title=\"Click to share on LinkedIn\"><span>LinkedIn<\/span><\/a><\/li><li class=\"share-twitter\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-twitter-45\" class=\"share-twitter sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=twitter\" target=\"_blank\" title=\"Click to share on Twitter\"><span>Twitter<\/span><\/a><\/li><li class=\"share-pinterest\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-pinterest-45\" class=\"share-pinterest sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=pinterest\" target=\"_blank\" title=\"Click to share on Pinterest\"><span>Pinterest<\/span><\/a><\/li><li><a href=\"#\" class=\"sharing-anchor sd-button share-more\"><span>More<\/span><\/a><\/li><li class=\"share-end\"><\/li><\/ul><div class=\"sharing-hidden\"><div class=\"inner\" style=\"display: none;\"><ul><li class=\"share-reddit\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-reddit sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=reddit\" target=\"_blank\" title=\"Click to share on Reddit\"><span>Reddit<\/span><\/a><\/li><li class=\"share-tumblr\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-tumblr sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=tumblr\" target=\"_blank\" title=\"Click to share on Tumblr\"><span>Tumblr<\/span><\/a><\/li><li class=\"share-end\"><\/li><li class=\"share-pocket\"><a rel=\"nofollow noopener noreferrer\" data-shared=\"\" class=\"share-pocket sd-button share-icon\" href=\"https:\/\/www.firealarmsboston.com\/?page_id=45&amp;share=pocket\" target=\"_blank\" title=\"Click to share on Pocket\"><span>Pocket<\/span><\/a><\/li><li class=\"share-end\"><\/li><\/ul><\/div><\/div><\/div><\/div><\/div>","protected":false},"author":1,"featured_media":0,"parent":16,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"spay_email":""},"jetpack_shortlink":"https:\/\/wp.me\/P3k9h9-J","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":21,"url":"https:\/\/www.firealarmsboston.com\/?page_id=21","url_meta":{"origin":45,"position":0},"title":"Heat Detectors","date":"April 3, 2013","format":false,"excerpt":"Heat detectors detect heat. There are two kinds of detection, fixed and rate of rise. Some detectors are a combination of both. Fixed temperature means when a set temperature is reached the device will activate alarms. The common temperatures for these are 135 and 194 degrees. Rate of rise is\u2026","rel":"","context":"Similar post","img":{"alt_text":"","src":"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/5151.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":19,"url":"https:\/\/www.firealarmsboston.com\/?page_id=19","url_meta":{"origin":45,"position":1},"title":"Smoke Detectors","date":"April 3, 2013","format":false,"excerpt":"Smoke detectors are devices that detect the presence of smoke and initiate alarms. There\u00a0are two most common types, ionization and photoelectric. Ionization detectors use radioactive material to ionize the air and detect particles of smoke. Photoelectric detectors use obscuration, meaning after a certain drop in voltage at the light sensor\u2026","rel":"","context":"Similar post","img":{"alt_text":"Multisensor detector","src":"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/ad355-1024x633.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":23,"url":"https:\/\/www.firealarmsboston.com\/?page_id=23","url_meta":{"origin":45,"position":2},"title":"Beam Detectors","date":"April 3, 2013","format":false,"excerpt":"Beam detectors are devices that use infrared beams to detect smoke obscuration. When the smoke causes the beam strength to drop a set amount, the device will enter an alarm state, setting off the fire alarm system. Beam detectors are used to cover large areas or hard to access areas.","rel":"","context":"Similar post","img":{"alt_text":"Beam Detector","src":"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/6500-MMK.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":25,"url":"https:\/\/www.firealarmsboston.com\/?page_id=25","url_meta":{"origin":45,"position":3},"title":"Carbon Monoxide Detectors","date":"April 3, 2013","format":false,"excerpt":"Carbon monoxide detectors are used to detect rising carbon monoxide levels and initiate an alarm condition allowing occupants to evacuate and emergency response to be notified, so lives can be saved. \u00a0","rel":"","context":"Similar post","img":{"alt_text":"Carbon Monoxide Detector","src":"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/98548528-539x480-0-0_Ademco+Ademco+Honeywell+5800CO+Wireless+Carbon+Mon.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":13,"url":"https:\/\/www.firealarmsboston.com\/?page_id=13","url_meta":{"origin":45,"position":4},"title":"Fire Alarm Systems Basics","date":"April 3, 2013","format":false,"excerpt":"Fire alarm systems are a combination of initiation devices tied into a main control panel. Any initiation device\u00a0that\u00a0activates will cause an alarm condition on the main control panel that will in turn activate notification devices, relays, and if set up, send notification of alarm to fire department via central station,\u2026","rel":"","context":"Similar post","img":{"alt_text":"Fire alarm block diagram","src":"https:\/\/i0.wp.com\/firealarmsboston.com\/wp-content\/uploads\/2013\/04\/Fire_alarm_diag2.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":325,"url":"https:\/\/www.firealarmsboston.com\/?page_id=325","url_meta":{"origin":45,"position":5},"title":"The Codes and Installing Alarms","date":"July 25, 2015","format":false,"excerpt":"The codes that regulate the installation and maintenance of alarm systems are many. Here we are providing links to various organizations and websites so you can view and learn the codes that apply to your systems or the ones you are considering purchasing. Please enjoy the bounty of information, and\u2026","rel":"","context":"Similar post","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/pages\/45"}],"collection":[{"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=45"}],"version-history":[{"count":4,"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/pages\/45\/revisions"}],"predecessor-version":[{"id":271,"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/pages\/45\/revisions\/271"}],"up":[{"embeddable":true,"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=\/wp\/v2\/pages\/16"}],"wp:attachment":[{"href":"https:\/\/www.firealarmsboston.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=45"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}