{"id":15246,"date":"2026-10-26T07:43:31","date_gmt":"2026-10-26T07:43:31","guid":{"rendered":"https:\/\/azeidkgroup.com\/fire-detector-types-selection\/"},"modified":"2026-10-29T19:02:51","modified_gmt":"2026-10-29T19:02:51","slug":"fire-detector-types-selection","status":"publish","type":"post","link":"https:\/\/azeidkgroup.com\/en\/sa\/media-center\/fire-detector-types-selection\/","title":{"rendered":"Choosing Fire Detectors: Smoke, Heat, Beam and Flame"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"15246\" class=\"elementor elementor-15246 elementor-15245 elementor-bc-flex-widget\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d7d5c61 e-con-full az-el-article e-flex e-con e-parent\" data-id=\"d7d5c61\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-33f8c86 elementor-widget elementor-widget-text-editor\" data-id=\"33f8c86\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"az-intro\">Choosing fire detectors means matching the detection principle to the expected fire and to each space. Optical smoke detectors suit most offices, rooms and escape routes; heat detectors suit kitchens and dusty plant rooms; beam or aspirating detection covers high halls; and flame detectors protect fuel and gas hazards. Ceiling height, temperature, airflow and false alarm risk then set the layout.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-39a0804 elementor-widget elementor-widget-text-editor\" data-id=\"39a0804\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"az-keybox\"><h2>Key takeaways<\/h2>\n<ul>\n<li>Match detector to fire and space: optical for smoldering fires, flame for fast fuel fires, heat or multi-sensor where steam or dust cause false alarms.<\/li>\n<li>Unless designed and listed for the conditions, NFPA 72 does not allow smoke detectors below 0\u00b0C or above 38\u00b0C, above 93% relative humidity or in air faster than 1.5 m\/s.<\/li>\n<li>NFPA 72 requires heat detectors rated at least 20\u00b0F (about 11\u00b0C) above the hottest expected ceiling temperature.<\/li>\n<li>On high ceilings smoke stratifies, so beam or aspirating detection usually replaces spot detectors.<\/li>\n<li>Approval belongs to the exact model and its panel compatibility, not the brand.<\/li>\n<\/ul><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-362560f elementor-widget elementor-widget-text-editor\" data-id=\"362560f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>How fire detectors work: the main types<\/h2>\n<p>Each automatic detector watches for a product of fire: smoke, heat, flame radiation or carbon monoxide (CO).<\/p>\n<div class=\"az-table-wrap\"><table>\n<thead><tr><th>Type<\/th><th>Typical spaces<\/th><th>Main limit<\/th><th>Product standard<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Optical point smoke<\/td><td>Offices, corridors, rooms<\/td><td>False alarms from steam, dust, cooking<\/td><td>EN 54-7; UL 268<\/td><\/tr>\n<tr><td>Ionization point smoke<\/td><td>Declining use<\/td><td>Radioactive source<\/td><td>EN 54-7; UL 268<\/td><\/tr>\n<tr><td>Multi-sensor<\/td><td>Rooms with nuisance alarm risk<\/td><td>Mode should be set and recorded<\/td><td>EN 54-29, 30 and 31<\/td><\/tr>\n<tr><td>Point heat<\/td><td>Kitchens, plant rooms, car parks<\/td><td>Late response<\/td><td>EN 54-5<\/td><\/tr>\n<tr><td>Linear heat<\/td><td>Cable trays, conveyors, tunnels<\/td><td>No early warning<\/td><td>EN 54-22<\/td><\/tr>\n<tr><td>Optical beam<\/td><td>Warehouses, halls, atriums<\/td><td>Needs clear line of sight<\/td><td>EN 54-12<\/td><\/tr>\n<tr><td>Aspirating (ASD)<\/td><td>Data centers, high or harsh spaces<\/td><td>Needs a designed pipe network<\/td><td>EN 54-20<\/td><\/tr>\n<tr><td>Flame<\/td><td>Fuel and gas hazards, hangars<\/td><td>Blind without flame or line of sight<\/td><td>EN 54-10<\/td><\/tr>\n<\/tbody>\n<\/table><\/div>\n<h3>Smoke detectors: optical, ionization and multi-sensor<\/h3>\n<p>Optical detectors sense light scattered by smoke and respond best to smoldering fires; ionization detectors suit fast flaming fires but contain a small americium-241 source. The UK Fire Industry Association (FIA) reports that photoelectric detectors are now preferred, partly because of the regulatory cost of radioactive devices.<\/p>\n<p>Multi-sensor detectors compare smoke, heat and sometimes CO signals before alarming. BS 5839-1:2025 recommends them where point smoke detectors carry a higher false alarm risk, with each mode recorded.<\/p>\n<h3>Heat detectors<\/h3>\n<p>Fixed-temperature detectors alarm at a set point; rate-of-rise detectors also react to a fast climb. They tolerate steam and dust but respond late, so BS 5839-1:2025 no longer permits them in sleeping rooms in Category L2 systems and advises against them there in L3.<\/p>\n<h3>Beam, aspirating and flame detectors<\/h3>\n<p>A beam detector alarms when smoke obscures light projected across the space. Aspirating systems draw air through a pipe network to a central detector, rated under EN 54-20 as Class A (very high sensitivity), Class B (enhanced) or Class C (normal).<\/p>\n<p>A 2019 Emerson application article notes that ultraviolet (UV) detectors are susceptible to welding, X-rays, lightning and sunlight, while infrared (IR) detectors can be affected by hot surfaces, exhaust gases and sunlight.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f6173c elementor-widget elementor-widget-text-editor\" data-id=\"1f6173c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Where each detector fits in Saudi projects<\/h2>\n<p>The Saudi Fire Protection Code (SBC 801), whose 2024 edition is listed by the <a href=\"https:\/\/sbc.gov.sa\/En\/BC\/Pages\/BuildingCode\/BCDetails.aspx?codeId=801&amp;year=2024\" rel=\"noopener\" target=\"_blank\">Saudi Building Code Center<\/a>, sets where detection is required by occupancy, with Civil Defense requirements and the project specification (see our <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/media-center\/saudi-building-code-sbc-801-fire-protection\/\">SBC 801 guide<\/a>). Typical choices:<\/p>\n<ul>\n<li>Offices, hotel and patient rooms, classrooms, corridors: optical or multi-sensor detectors.<\/li>\n<li>Commercial kitchens and plant rooms: heat or multi-sensor detectors; hoods also need a <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/media-center\/commercial-kitchen-fire-suppression-systems-guide\/\">kitchen fire suppression system<\/a>.<\/li>\n<li>Car parks: heat, multi-sensor or linear heat detection, depending on exhaust fumes.<\/li>\n<li>Warehouses, halls and high mosque domes: beam or aspirating detection (see our <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/media-center\/warehouse-high-rack-storage-fire-protection-esfr\/\">high-rack warehouse guide<\/a>).<\/li>\n<li>Data centers: aspirating detection, often Class A, as in our <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/media-center\/data-center-fire-protection-guide\/\">data center fire protection guide<\/a>.<\/li>\n<li>Fuel stores, generator rooms and hangars: flame detectors alongside smoke or heat detectors.<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-71c54ef elementor-widget elementor-widget-text-editor\" data-id=\"71c54ef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Selection criteria: environment, height and false alarms<\/h2>\n<h3>Temperature, humidity and airflow<\/h3>\n<p>NFPA 72, published by the National Fire Protection Association (NFPA), does not allow smoke detectors, unless designed and listed for the conditions, below 0\u00b0C or above 38\u00b0C, above 93% relative humidity, or in air faster than 1.5 m\/s. Metal-roofed warehouses and roof voids can pass 38\u00b0C in a Saudi summer, so measure first. BS 5839-1 also recommends keeping detectors at least 1 m from air supply points.<\/p>\n<h3>Choosing a heat detector class<\/h3>\n<p>EN 54-5 defines each class by a maximum application temperature; choose a class whose maximum is not exceeded at the ceiling:<\/p>\n<div class=\"az-table-wrap\"><table>\n<thead><tr><th>EN 54-5 class<\/th><th>Maximum application temperature<\/th><th>Static response temperature<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>A1<\/td><td>50\u00b0C<\/td><td>54 to 65\u00b0C<\/td><\/tr>\n<tr><td>A2<\/td><td>50\u00b0C<\/td><td>54 to 70\u00b0C<\/td><\/tr>\n<tr><td>B<\/td><td>65\u00b0C<\/td><td>69 to 85\u00b0C<\/td><\/tr>\n<tr><td>C<\/td><td>80\u00b0C<\/td><td>84 to 100\u00b0C<\/td><\/tr>\n<\/tbody>\n<\/table><\/div>\n<p>NFPA 72 requires a rating at least 20\u00b0F (about 11\u00b0C) above the maximum expected ceiling temperature; BS 5839-1 recommends a static response at least 29\u00b0C above average ambient and 4\u00b0C above the highest expected temperature. A roof void reaching 55\u00b0C in summer therefore rules out Classes A1 and A2.<\/p>\n<h3>Ceiling height and stratification<\/h3>\n<p>Smoke can cool and stall below a high ceiling before reaching detectors (stratification). The 2025 edition of NFPA 72 limits the prescriptive spacing method for spot smoke detectors to ceilings up to 12.2 m (40 ft), requiring performance-based design above that; fire protection engineer Wayne Moore advises against them on ceilings of 6.1 m (20 ft) or more.<\/p>\n<p>For heat detectors, Table 17.6.3.5.1 in the 2019 edition of NFPA 72 reduces the listed spacing by a factor of 0.64 at about 6.1 m and 0.34 at 8.5 to 9.1 m, so a detector listed at 15.2 m (50 ft) on a 6.1 m ceiling is spaced at about 9.8 m.<\/p>\n<h3>False alarms<\/h3>\n<p>BS 5839-1:2025 recommends a preliminary investigation above four false alarms per 100 detectors per year, and an in-depth investigation for systems with more than 40 detectors averaging above five per 100 detectors per year.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-751f791 elementor-widget elementor-widget-text-editor\" data-id=\"751f791\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Spacing and siting: NFPA 72 and BS 5839-1 compared<\/h2>\n<p>Apply one standard consistently; the main differences:<\/p>\n<div class=\"az-table-wrap\"><table>\n<thead><tr><th>Rule<\/th><th>NFPA 72<\/th><th>BS 5839-1<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Smoke detectors, smooth flat ceiling<\/td><td>Nominal spacing 9.1 m (30 ft) with half that to walls, or alternatively every ceiling point within 0.7 \u00d7 9.1 m (about 6.4 m) of a detector<\/td><td>Each detector covers a 7.5 m radius<\/td><\/tr>\n<tr><td>Heat detectors<\/td><td>Listed spacing, reduced as the ceiling rises<\/td><td>Each detector covers a 5.3 m radius<\/td><\/tr>\n<tr><td>Sensing element below ceiling<\/td><td>Per the adopted edition and the listing<\/td><td>Smoke 25 to 600 mm; heat 25 to 150 mm<\/td><\/tr>\n<tr><td>Maximum ceiling height<\/td><td>No height table for smoke detectors; 2025 edition: prescriptive method up to 12.2 m<\/td><td>General limits: smoke 10.5 m; Class A1 heat 9 m; other heat classes 7.5 m; beam 25 m, or 40 m with enhanced sensitivity plus supplementary detection unless stratification risk is minimal<\/td><\/tr>\n<\/tbody>\n<\/table><\/div>\n<p>BS 5839-1 values are the 2017 edition&#8217;s general limits (higher over up to 10% of the ceiling area), as summarized in Apollo&#8217;s 2019 guide; confirm them in Table 3 of the 2025 edition. Under NFPA 72, beams 10% of the ceiling height deep or more and spaced at 40% of it or more need a smoke detector in each beam pocket. Beam spacing follows the manufacturer&#8217;s instructions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6bc6b06 elementor-widget elementor-widget-text-editor\" data-id=\"6bc6b06\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Step-by-step: selecting fire detectors for a project<\/h2>\n<ol>\n<li>Confirm where detection is required and the design standard.<\/li>\n<li>Record each space&#8217;s use, ceiling height, temperature, dust and airflow.<\/li>\n<li>Identify the likely fire: smoldering, fast flaming, liquid or gas.<\/li>\n<li>Choose the detector type and check the standard&#8217;s environmental and height limits.<\/li>\n<li>Select heat detector classes above the highest ceiling temperature.<\/li>\n<li>Lay out spacing around beams, ducts and diffusers.<\/li>\n<li>Verify each model&#8217;s EN 54 or UL approval and panel compatibility (see our <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/media-center\/how-to-choose-fire-alarm-control-panel\/\">fire alarm control panel guide<\/a>).<\/li>\n<\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4568eab elementor-widget elementor-widget-text-editor\" data-id=\"4568eab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Common site mistakes<\/h2>\n<ul>\n<li>Spot smoke detectors in hot, unconditioned spaces without a suitable listing.<\/li>\n<li>Heat detector classes too close to the ceiling temperature, such as A1 under a hot metal roof.<\/li>\n<li>Heat detectors where early warning is needed, such as bedrooms.<\/li>\n<li>Detectors next to supply diffusers, or layouts that ignore deep beams.<\/li>\n<li>Beam detectors on flexing structures, or with racking crossing the beam.<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-149dc0f elementor-widget elementor-widget-text-editor\" data-id=\"149dc0f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Inspection, testing, maintenance and cost<\/h2>\n<p>Detectors are tested with the system at the intervals set by the adopted edition of NFPA 72 or BS 5839-1 and by Civil Defense. Good practice: test each detector with the right method for its type, clean or replace it as the manufacturer directs, check beam alignment and aspirating airflow, and log false alarms by device.<\/p>\n<p>Cost depends mainly on detector count, technology, approval route and model, access at height, cabling and lifetime maintenance.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af7f731 elementor-widget elementor-widget-text-editor\" data-id=\"af7f731\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>How AZEIDK helps<\/h2>\n<p>Through our <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/solutions\/fire-alarm-systems\/\">fire alarm system solutions<\/a>, AZEIDK provides site surveys, <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/services\/engineering-design-calculations\/\">engineering design and calculations<\/a>, equipment selection and supply, installation and programming, testing and commissioning, Civil Defense approval support and annual maintenance contracts, backed by 16+ years in the Saudi market and 17+ branches and service regions.<\/p>\n<p>We supply the <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/media-center\/context-plus-brand-fire-alarm-saudi-arabia\/\">Context Plus fire alarm range<\/a> with a compliance review for each project; its detectors include addressable optical smoke, A2S heat, self-aligning beam and IR2 flame models. For recurring false alarms, our <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/services\/assessment-of-existing-systems-scope-of-work-definition\/\">existing systems assessment<\/a> helps find detectors to move or replace; our <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/media-center\/en54-fire-alarm-standard-guide\/\">EN 54 guide<\/a> and <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/media-center\/nfpa-72-fire-alarm-code-guide\/\">NFPA 72 guide<\/a> cover approval and design.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ff78565 elementor-widget elementor-widget-text-editor\" data-id=\"ff78565\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>FAQ<\/h2>\n<div class=\"az-faq\"><details class=\"az-faq__item\"><summary><h3>What is the difference between optical and ionization smoke detectors?<\/h3><\/summary><p>An optical detector senses light scattered by smoke and responds best to smoldering fires; an ionization detector uses a small radioactive source and suits fast flaming fires. Optical and multi-sensor detectors are now the usual choice, partly because radioactive devices carry extra transport and disposal rules.<\/p><\/details><details class=\"az-faq__item\"><summary><h3>Can I install a smoke detector in a commercial kitchen?<\/h3><\/summary><p>Heat detectors are the usual choice in commercial kitchens, because steam and cooking fumes set off smoke detectors. Where earlier warning is needed nearby, BS 5839-1:2025 recommends multi-sensor detectors in areas with high false alarm risk. The hood itself needs a separate kitchen suppression system.<\/p><\/details><details class=\"az-faq__item\"><summary><h3>How far apart should smoke detectors be?<\/h3><\/summary><p>Under NFPA 72, the nominal spacing on a smooth flat ceiling is 9.1 m (30 ft), with walls within half that; alternatively, every ceiling point within about 6.4 m (0.7 \u00d7 9.1 m) of a detector. Under BS 5839-1, each smoke detector covers a 7.5 m radius. Beams, height and airflow can reduce these distances.<\/p><\/details><details class=\"az-faq__item\"><summary><h3>Which detector suits a high warehouse ceiling?<\/h3><\/summary><p>Beam detectors suit open, stable spaces with a clear line of sight; BS 5839-1 (2017 values) gives a general limit of 25 m, or 40 m with enhanced sensitivity and supplementary detection unless stratification risk is minimal. Aspirating detection suits very high or hard-to-reach spaces: Apollo&#8217;s guide lists 40 m for Class B with at least 15 sampling holes, with multi-level detection recommended.<\/p><\/details><details class=\"az-faq__item\"><summary><h3>When do I need a flame detector?<\/h3><\/summary><p>Where a fire can grow fast with open flame and little early smoke, such as fuel, solvent or gas areas, generator rooms and hangars. Flame detectors need a clear line of sight, and the type should resist local false sources such as welding and sunlight. They usually supplement smoke or heat detection.<\/p><\/details><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bf71010 elementor-widget elementor-widget-text-editor\" data-id=\"bf71010\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"az-source\"><strong>References:<\/strong> the <a href=\"https:\/\/www.fia.uk.com\/static\/10e3c380-28c0-499b-887aafd51d12eff6\/Guide-to-the-changes-in-BS-5839-1-2025.pdf\" rel=\"noopener\" target=\"_blank\">FIA guide to BS 5839-1:2025 changes<\/a>, <a href=\"https:\/\/www.apollo-fire.co.uk\/globalassets\/downloadable-content\/apollo-pocket-guide-final-aw_lo-res-spreads.pdf\" rel=\"noopener\" target=\"_blank\">Apollo pocket guide to BS 5839-1<\/a>, <a href=\"https:\/\/ecmag.com\/section\/integrated-systems\/whats-correct-measurement-solving-smoke-detection-spacing-dilemma\" rel=\"noopener\" target=\"_blank\">Electrical Contractor magazine on smoke detector spacing<\/a>, <a href=\"https:\/\/www.ecmag.com\/magazine\/articles\/article-detail\/frigid-forecast-how-does-the-environment-affect-detection\" rel=\"noopener\" target=\"_blank\">Electrical Contractor on how the environment affects detection<\/a>, the <a href=\"https:\/\/www.fia.uk.com\/resources\/british-standards\/bs-en-54-series-fire-detection-alarm-systems.html\" rel=\"noopener\" target=\"_blank\">FIA list of EN 54 parts<\/a>, and <a href=\"https:\/\/emerson.com\/documents\/automation\/article-select-right-flame-detector-en-5429708.pdf\" rel=\"noopener\" target=\"_blank\">Emerson on selecting flame detectors<\/a>.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-158e79a elementor-widget elementor-widget-text-editor\" data-id=\"158e79a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"az-cta\"><strong>Need the right detectors for your project?<\/strong> Send our engineers your drawings and space conditions for a detector selection and layout review. <a href=\"https:\/\/azeidkgroup.com\/en\/sa\/contact\/\">Contact the AZEIDK team<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>How to choose fire detectors for each space: smoke, heat, multi-sensor, beam, aspirating and flame, with spacing rules, height limits and false alarm causes.<\/p>\n","protected":false},"author":2,"featured_media":16378,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[221],"tags":[],"azeidk_region":[223],"class_list":["post-15246","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-azeidk-articles"],"acf":[],"_links":{"self":[{"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/posts\/15246","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/comments?post=15246"}],"version-history":[{"count":3,"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/posts\/15246\/revisions"}],"predecessor-version":[{"id":16760,"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/posts\/15246\/revisions\/16760"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/media\/16378"}],"wp:attachment":[{"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/media?parent=15246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/categories?post=15246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/tags?post=15246"},{"taxonomy":"azeidk_region","embeddable":true,"href":"https:\/\/azeidkgroup.com\/en\/wp-json\/wp\/v2\/azeidk_region?post=15246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}