{"id":920985,"date":"2026-09-29T14:00:00","date_gmt":"2026-09-29T12:00:00","guid":{"rendered":"https:\/\/djya2ldob4.wpdns.site\/?page_id=920985"},"modified":"2026-10-30T10:12:40","modified_gmt":"2026-10-30T09:12:40","slug":"os28","status":"publish","type":"page","link":"https:\/\/www.cqop.com\/en\/list-of-soa-categories\/specialised-works\/os28\/","title":{"rendered":"SOA category OS28"},"content":{"rendered":"\n\n<div class=\"cqop-v6 cqop-v6-soa-categoria-os28\" data-v6-page=\"Categoria-OS28\">\n\n<div class=\"cqop-v6-pannello-829311a\" id=\"contenuto\">\n\n<div class=\"gb-text cqop-v6-pannello-fd08351\" aria-hidden=\"true\"><\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-d3705ba\" aria-hidden=\"true\"><\/div>\n\n\n\n\n\n<div class=\"cqop-v6-contenuto-06a0e85\"><nav style=\"--separator: &quot;\/&quot;\" class=\"cqop-breadcrumbs wp-block-breadcrumbs\" aria-label=\"Breadcrumbs\"><ol><li><a href=\"https:\/\/www.cqop.com\/en\/\">Home<\/a><\/li><li><a href=\"https:\/\/www.cqop.com\/en\/list-of-soa-categories\/\">List of SOA categories<\/a><\/li><li><a href=\"https:\/\/www.cqop.com\/en\/list-of-soa-categories\/specialised-works\/\">SOA specialised works categories<\/a><\/li><li><span aria-current=\"page\">SOA category OS28<\/span><\/li><\/ol><\/nav>\n\n\n\n<div class=\"cqop-v6-pannello-f3875ab\">\n\n<span class=\"gb-text cqop-v6-pannello-4855609\">OS28<\/span>\n\n\n\n\n\n<span class=\"gb-text cqop-v6-pannello-ea96d22\">Specialised works categories<\/span>\n\n<\/div>\n\n\n\n\n\n<h1 class=\"gb-text cqop-v6-titolo-b35a3b5\">SOA category <span class=\"cqop-v6-pannello-8a3115e\">OS28<span aria-hidden=\"true\" class=\"cqop-v6-pannello-f4fc0bb\"><\/span><\/span><\/h1>\n\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-7496375\">Heating and air-conditioning systems<\/p>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-13e79de\">\n\n<div class=\"cqop-v6-griglia-642d0e4\">\n\n<div>\n<p class=\"gb-text cqop-v6-testo-43af25e\"><strong class=\"cqop-v6-pannello-7f02261\">OS28<\/strong> covers <strong class=\"cqop-v6-pannello-7f02261\">heating and air-conditioning systems<\/strong>: supply, installation, <strong class=\"cqop-v6-pannello-7f02261\">maintenance<\/strong> and renovation of heating, air-conditioning and refrigeration systems. It ranges from domestic <strong class=\"cqop-v6-pannello-7f02261\">heat pumps<\/strong> to large office systems, through to industrial refrigeration and <strong class=\"cqop-v6-pannello-7f02261\">solar thermal<\/strong>. Together with <strong class=\"cqop-v6-pannello-7f02261\">OS3<\/strong> and <strong class=\"cqop-v6-pannello-7f02261\">OS30<\/strong>, forms part of the general category <strong class=\"cqop-v6-pannello-7f02261\">OG11 Technological systems<\/strong>. It is a fast-growing qualification thanks to the <strong class=\"cqop-v6-pannello-7f02261\">EU Green Homes Directive<\/strong> and the <strong class=\"cqop-v6-pannello-7f02261\">energy transition<\/strong>.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-136555f\">\n\n<div class=\"cqop-v6-pannello-be753d0\">\n\n<svg focusable=\"false\" role=\"presentation\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 201 201\" width=\"201\" height=\"201\" aria-hidden=\"true\" class=\"cqop-os-original-icon\" style=\"display:block;width:120px;height:120px;max-width:none;margin:0 0 28px;\"><path fill=\"#fff\" d=\"M22.9 28.9h2.2v2.2h-2.2zM27.34 28.9h2.2v2.2h-2.2zM31.78 28.9h2.2v2.2h-2.2zM36.22 28.9h2.2v2.2h-2.2zM40.66 28.9h2.2v2.2h-2.2zM45.11 28.9h2.2v2.2h-2.2zM49.55 28.9h2.2v2.2h-2.2zM53.99 28.9h2.2v2.2h-2.2zM58.43 28.9h2.2v2.2h-2.2zM62.87 28.9h2.2v2.2h-2.2zM67.31 28.9h2.2v2.2h-2.2zM71.75 28.9h2.2v2.2h-2.2zM76.19 28.9h2.2v2.2h-2.2zM80.64 28.9h2.2v2.2h-2.2zM85.08 28.9h2.2v2.2h-2.2zM89.52 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75.9h2.2v2.2h-2.2zM82.02 79.81h2.2v2.2h-2.2zM77.79 80.77h2.2v2.2h-2.2zM74.4 78.07h2.2v2.2h-2.2zM74.4 73.73h2.2v2.2h-2.2zM77.79 71.03h2.2v2.2h-2.2zM82.02 71.99h2.2v2.2h-2.2zM78.9 75.9h2.2v2.2h-2.2zM83.7 75.9h2.2v2.2h-2.2zM88.5 75.9h2.2v2.2h-2.2zM93.3 75.9h2.2v2.2h-2.2zM98.1 75.9h2.2v2.2h-2.2zM102.9 75.9h2.2v2.2h-2.2zM76.5 80.06h2.2v2.2h-2.2zM74.1 84.21h2.2v2.2h-2.2zM71.7 88.37h2.2v2.2h-2.2zM69.3 92.53h2.2v2.2h-2.2zM66.9 96.68h2.2v2.2h-2.2zM76.5 71.74h2.2v2.2h-2.2zM74.1 67.59h2.2v2.2h-2.2zM71.7 63.43h2.2v2.2h-2.2zM69.3 59.27h2.2v2.2h-2.2zM66.9 55.12h2.2v2.2h-2.2z\"\/><path fill=\"#fff\" d=\"M121.9 52.9h2.2v2.2h-2.2zM126.19 52.9h2.2v2.2h-2.2zM130.47 52.9h2.2v2.2h-2.2zM134.76 52.9h2.2v2.2h-2.2zM139.04 52.9h2.2v2.2h-2.2zM143.33 52.9h2.2v2.2h-2.2zM147.61 52.9h2.2v2.2h-2.2zM151.9 52.9h2.2v2.2h-2.2zM121.9 67.9h2.2v2.2h-2.2zM126.19 67.9h2.2v2.2h-2.2zM130.47 67.9h2.2v2.2h-2.2zM134.76 67.9h2.2v2.2h-2.2zM139.04 67.9h2.2v2.2h-2.2zM143.33 67.9h2.2v2.2h-2.2zM147.61 67.9h2.2v2.2h-2.2zM151.9 67.9h2.2v2.2h-2.2zM121.9 82.9h2.2v2.2h-2.2zM126.19 82.9h2.2v2.2h-2.2zM130.47 82.9h2.2v2.2h-2.2zM134.76 82.9h2.2v2.2h-2.2zM139.04 82.9h2.2v2.2h-2.2zM143.33 82.9h2.2v2.2h-2.2zM147.61 82.9h2.2v2.2h-2.2zM151.9 82.9h2.2v2.2h-2.2zM121.9 97.9h2.2v2.2h-2.2zM126.19 97.9h2.2v2.2h-2.2zM130.47 97.9h2.2v2.2h-2.2zM134.76 97.9h2.2v2.2h-2.2zM139.04 97.9h2.2v2.2h-2.2zM143.33 97.9h2.2v2.2h-2.2zM147.61 97.9h2.2v2.2h-2.2zM151.9 97.9h2.2v2.2h-2.2z\"\/><path fill=\"#D98296\" d=\"M48.9 137.9h2.2v2.2h-2.2zM46.23 141.57h2.2v2.2h-2.2zM43.57 145.23h2.2v2.2h-2.2zM40.9 148.9h2.2v2.2h-2.2zM44.4 152.15h2.2v2.2h-2.2zM47.9 155.4h2.2v2.2h-2.2zM51.4 158.65h2.2v2.2h-2.2zM54.9 161.9h2.2v2.2h-2.2zM52.9 165.65h2.2v2.2h-2.2zM50.9 169.4h2.2v2.2h-2.2zM48.9 173.15h2.2v2.2h-2.2zM46.9 176.9h2.2v2.2h-2.2zM93.9 137.9h2.2v2.2h-2.2zM91.23 141.57h2.2v2.2h-2.2zM88.57 145.23h2.2v2.2h-2.2zM85.9 148.9h2.2v2.2h-2.2zM89.4 152.15h2.2v2.2h-2.2zM92.9 155.4h2.2v2.2h-2.2zM96.4 158.65h2.2v2.2h-2.2zM99.9 161.9h2.2v2.2h-2.2zM97.9 165.65h2.2v2.2h-2.2zM95.9 169.4h2.2v2.2h-2.2zM93.9 173.15h2.2v2.2h-2.2zM91.9 176.9h2.2v2.2h-2.2zM138.9 137.9h2.2v2.2h-2.2zM136.23 141.57h2.2v2.2h-2.2zM133.57 145.23h2.2v2.2h-2.2zM130.9 148.9h2.2v2.2h-2.2zM134.4 152.15h2.2v2.2h-2.2zM137.9 155.4h2.2v2.2h-2.2zM141.4 158.65h2.2v2.2h-2.2zM144.9 161.9h2.2v2.2h-2.2zM142.9 165.65h2.2v2.2h-2.2zM140.9 169.4h2.2v2.2h-2.2zM138.9 173.15h2.2v2.2h-2.2zM136.9 176.9h2.2v2.2h-2.2z\"\/><\/svg>\n\n<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-96ce454\">Simulate the cost of SOA certification<\/div>\n\n\n\n\n\n<a class=\"gb-text cqop-v6-pulsante-5eba899 cqop-v6-state-6d47db8\" href=\"https:\/\/www.cqop.com\/en\/online-services\/fee-and-requirements-calculation\/\">Calculate fees and requirements<\/a>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-1d12dfc\">\n\n<figure class=\"cqop-v6-pannello-ca9f003\">\n\n<div>\n<img decoding=\"async\" class=\"gb-media-cqv61361 cqop-v6-pannello-e34122a gb-text\" src=\"https:\/\/www.cqop.com\/wp-content\/uploads\/2026\/10\/os28_image2-en.webp\" alt=\"The scope of OS28: residential with heat pump, commercial with rooftop chiller, industrial refrigeration\"\/>\n<\/div>\n\n\n\n\n\n<figcaption class=\"gb-text cqop-v6-pannello-ad07637\">The scope of OS28: residential with heat pump, commercial with rooftop chiller, industrial refrigeration<\/figcaption>\n\n<\/figure>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-13e79de\">\n\n<div class=\"cqop-v6-griglia-74a4c6d\">\n\n<div class=\"cqop-v6-titolo-sticky-1c8b9f9\">\n\n<h2 class=\"gb-text cqop-v6-titolo-ecc189a\">SOA certification OS28: areas of application<\/h2>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-71e1793\">\n<p class=\"gb-text cqop-v6-testo-04d085f\"><strong class=\"cqop-v6-pannello-7f02261\">OS28<\/strong> covers all climate control in buildings, from heating to cooling. The main sectors:<\/p>\n\n\n\n\n<ul class=\"cqop-v6-pannello-9bf0cf7\">\n\n<li class=\"gb-text cqop-v6-griglia-eaa3518\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">01<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Heating:<\/strong> condensing boilers, biomass generators, radiators, radiant floors and ceilings.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">02<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Air conditioning:<\/strong> split, multi-split, VRF systems, chillers and air handling units for offices.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">03<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Heat pumps:<\/strong> air-to-air, air-to-water, water-to-water and geothermal. It is the fastest-growing segment.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">04<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Solar thermal:<\/strong> panels for hot water and heating, also combined with heat pumps.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">05<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Refrigeration:<\/strong> cold rooms, supermarket plant rooms and cold-chain logistics, industrial processes.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">06<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Mechanical ventilation (MVHR):<\/strong> air exchange with heat recovery for homes, schools, offices and hospitals.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-d980411\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">07<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">District heating and cogeneration:<\/strong> substations connected to urban networks and small cogeneration plants.<\/span>\n            <\/li>\n\n\n\n\n\n<li class=\"gb-text cqop-v6-griglia-8357285\">\n              <span aria-hidden=\"true\" class=\"cqop-v6-pannello-17317d0\">08<\/span>\n              <span class=\"cqop-v6-pannello-f3665f8\"><strong class=\"cqop-v6-pannello-7f02261\">Regulation and control:<\/strong> automatic control and heat metering systems.<\/span>\n            <\/li>\n\n<\/ul>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-930206b\"><strong class=\"cqop-v6-pannello-7f02261\">In short:<\/strong> OS28 is the category of <strong class=\"cqop-v6-pannello-962ca18\">all-round climate control<\/strong>, at the heart of the <strong class=\"cqop-v6-pannello-962ca18\">energy transition<\/strong> in the coming years.<\/p>\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-1d12dfc\">\n\n<figure class=\"cqop-v6-pannello-ca9f003\">\n\n<div>\n<img decoding=\"async\" class=\"gb-media-cqv61382 cqop-v6-pannello-e34122a gb-text\" src=\"https:\/\/www.cqop.com\/wp-content\/uploads\/2026\/10\/os28_image3-en.webp\" alt=\"Functional diagram of a residential air-to-water heat pump system: hot water cylinder, fan coil, underfloor heating coils\"\/>\n<\/div>\n\n\n\n\n\n<figcaption class=\"gb-text cqop-v6-pannello-ad07637\">Functional diagram of a residential air-to-water heat pump system: hot water cylinder, fan coil, underfloor heating coils<\/figcaption>\n\n<\/figure>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-13e79de\">\n\n<div class=\"cqop-v6-contenuto-c7714c8\">\n\n<h2 class=\"gb-text cqop-v6-titolo-e915111\">SOA categories related to OS28<\/h2>\n\n\n\n\n\n<div class=\"cqop-v6-griglia-86cb130\">\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OG11<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Technological systems<\/div>\n\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">groups together OS28, OS3 and OS30. Companies holding OG11 can carry out OS28 works in the same classification.<\/p>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OS3<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Water and sanitary systems, kitchens, laundries<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">deals with the building\u2019s <strong class=\"cqop-v6-pannello-7f02261\">water network<\/strong>; OS28 with the <strong class=\"cqop-v6-pannello-7f02261\">production of heating and cooling<\/strong>. They often work together.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OS30<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Internal electrical systems<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">brings the <strong class=\"cqop-v6-pannello-7f02261\">power supply<\/strong> to <strong class=\"cqop-v6-pannello-7f02261\">heat pumps<\/strong>, air handling units and control systems.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OS4<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Electromechanical conveyor systems<\/div>\n\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">works alongside OS28 in tall buildings, where machine rooms house systems of both categories.<\/p>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OS5<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Pneumatic and intruder alarm systems<\/div>\n\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">borders on OS28 in pneumatic and central vacuum systems.<\/p>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OG1<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Civil and industrial buildings<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">is often the <strong class=\"cqop-v6-pannello-7f02261\">prevailing category<\/strong> in energy renovations: OG1 handles insulation and windows, OS28 replaces the generator and the system.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-12843ab\">\n\n<div class=\"gb-text cqop-v6-pannello-c59b2ea\">OG10<\/div>\n\n\n\n\n\n<div class=\"gb-text cqop-v6-pannello-0986e53\">Electricity transformation systems<\/div>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-8d82677\">is needed when heating systems require <strong class=\"cqop-v6-pannello-7f02261\">dedicated electrical substations<\/strong>, as in data centres.<\/p>\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-1d12dfc\">\n\n<figure class=\"cqop-v6-pannello-ca9f003\">\n\n<div>\n<img decoding=\"async\" class=\"gb-media-cqv61419 cqop-v6-pannello-e34122a gb-text\" src=\"https:\/\/www.cqop.com\/wp-content\/uploads\/2026\/10\/os28_image4-en.webp\" alt=\"HVAC system of a commercial building: rooftop chiller, AHU, cooling tower, ductwork and room diffusers\"\/>\n<\/div>\n\n\n\n\n\n<figcaption class=\"gb-text cqop-v6-pannello-ad07637\">HVAC system of a commercial building: rooftop chiller, AHU, cooling tower, ductwork and room diffusers<\/figcaption>\n\n<\/figure>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-13e79de\">\n\n<div class=\"cqop-v6-griglia-74a4c6d\">\n\n<div class=\"cqop-v6-titolo-sticky-1c8b9f9\">\n\n<h2 class=\"gb-text cqop-v6-titolo-ecc189a\">Why it pays to qualify in OS28<\/h2>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-71e1793\">\n<p class=\"gb-text cqop-v6-testo-3c2b5d5\"><strong class=\"cqop-v6-pannello-7f02261\">OS28<\/strong> is experiencing the biggest transformation in Italian building services in decades:<br>\u00b7 the <strong class=\"cqop-v6-pannello-7f02261\">EU \u2018Green Homes\u2019 Directive<\/strong> calls for a reduction in energy consumption in residential buildings by 2030;<br>\u00b7 demand is growing for <strong class=\"cqop-v6-pannello-7f02261\">heat pumps<\/strong>, ventilation and cooling for data centres and logistics.<\/p>\n\n\n\n<p class=\"gb-text cqop-category-conclusion-accent cqop-v6-testo-23dd753\">If you install <strong class=\"cqop-v6-pannello-962ca18\">heating, air-conditioning, heat pump or refrigeration systems<\/strong>, <strong class=\"cqop-v6-pannello-962ca18\">OS28<\/strong> opens up <strong class=\"cqop-v6-pannello-962ca18\">energy renovation<\/strong> contracts for schools, hospitals and public offices.<\/p>\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-481eee7\" id=\"faq\">\n\n<div class=\"cqop-v6-griglia-28a732f\">\n\n<div>\n\n<h2 class=\"gb-text cqop-v6-titolo-2c72ce6\">SOA category OS28: frequently asked questions<\/h2>\n\n\n\n\n\n<div class=\"cqop-category-download cqop-category-download-minimal cqop-category-download-faq\">\n<a class=\"gb-text cqop-category-download-button\" href=\"https:\/\/www.cqop.com\/wp-content\/uploads\/2026\/10\/schede-tecniche-soa-strutturate-1.pdf\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Download PDF technical data sheets \u2014 opens in a new tab\">\n<svg role=\"presentation\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"22\" height=\"22\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.7\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M12 3v12m-5-5 5 5 5-5M4 16v5h16v-5\"><\/path><\/svg>\n\n\n<span class=\"gb-text\">Download PDF technical data sheets<\/span>\n<\/a>\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div>\n\n<div class=\"wp-block-essential-blocks-accordion cqop-faq-accordion  root-cqop-faq-96006-0\"><div class=\"eb-parent-wrapper eb-parent-cqop-faq-96006-0 \"><div class=\"eb-accordion-container cqop-faq-96006-0\" data-accordion-type=\"accordion\" data-tab-icon=\"\" data-expanded-icon=\"\" data-transition-duration=\"500\"><div class=\"eb-accordion-inner\">\n\n<div class=\"wp-block-essential-blocks-accordion-item cqop-faq-96006-0-1 eb-accordion-wrapper\" data-clickable=\"false\"><div class=\"eb-accordion-title-wrapper eb-accordion-title-wrapper-cqop-faq-96006-0\" tabindex=\"0\"><div class=\"eb-accordion-title-content-wrap title-content-cqop-faq-96006-0\"><h2 class=\"eb-accordion-title\">What is the official description of category OS28?<\/h2><\/div><\/div><div class=\"eb-accordion-content-wrapper eb-accordion-content-wrapper-cqop-faq-96006-0\"><div class=\"eb-accordion-content\">\n\n<div class=\"gb-text cqop-faq-answer\"><div class=\"cqop-v6-pannello-f38d055 gb-text\">OS28 \u201cconcerns the supply, installation and maintenance or renovation of heating systems and air-conditioning systems, whatever their degree of importance, complete with all related masonry, complementary or ancillary works, to be carried out, separately from the execution of other systems, in general works that have already been completed or are under construction\u201d. It therefore includes all heating, cooling, air-conditioning and refrigeration works, including building works strictly ancillary to the system.<\/div><\/div>\n\n<\/div><\/div><\/div>\n\n\n\n\n\n<div class=\"wp-block-essential-blocks-accordion-item cqop-faq-96006-0-2 eb-accordion-wrapper\" data-clickable=\"false\"><div class=\"eb-accordion-title-wrapper eb-accordion-title-wrapper-cqop-faq-96006-0\" tabindex=\"0\"><div class=\"eb-accordion-title-content-wrap title-content-cqop-faq-96006-0\"><h2 class=\"eb-accordion-title\">What is the relationship between OS28 and OG11?<\/h2><\/div><\/div><div class=\"eb-accordion-content-wrapper eb-accordion-content-wrapper-cqop-faq-96006-0\"><div class=\"eb-accordion-content\">\n\n<div class=\"gb-text cqop-faq-answer\"><div class=\"cqop-v6-pannello-5afcd04 gb-text\">OG11 groups together OS28, OS3 and OS30. Companies holding OG11 in a classification can carry out OS28 works in the same classification. OS28 on its own is needed in contracts where the heating part prevails.<\/div><\/div>\n\n<\/div><\/div><\/div>\n\n\n\n\n\n<div class=\"wp-block-essential-blocks-accordion-item cqop-faq-96006-0-5 eb-accordion-wrapper\" data-clickable=\"false\"><div class=\"eb-accordion-title-wrapper eb-accordion-title-wrapper-cqop-faq-96006-0\" tabindex=\"0\"><div class=\"eb-accordion-title-content-wrap title-content-cqop-faq-96006-0\"><h2 class=\"eb-accordion-title\">Is it better to qualify in OG11 or OS28?<\/h2><\/div><\/div><div class=\"eb-accordion-content-wrapper eb-accordion-content-wrapper-cqop-faq-96006-0\"><div class=\"eb-accordion-content\">\n\n<div class=\"gb-text cqop-faq-answer\"><div class=\"cqop-v6-pannello-5afcd04 gb-text\">OG11 suits companies that carry out all three types of system: plumbing, heating and electrical. OS28 on its own suits those specialised in heating.<\/div><\/div>\n\n<\/div><\/div><\/div>\n\n\n\n\n\n<div class=\"wp-block-essential-blocks-accordion-item cqop-faq-96006-0-6 eb-accordion-wrapper\" data-clickable=\"false\"><div class=\"eb-accordion-title-wrapper eb-accordion-title-wrapper-cqop-faq-96006-0\" tabindex=\"0\"><div class=\"eb-accordion-title-content-wrap title-content-cqop-faq-96006-0\"><h2 class=\"eb-accordion-title\">Which works count as CEL for OS28?<\/h2><\/div><\/div><div class=\"eb-accordion-content-wrapper eb-accordion-content-wrapper-cqop-faq-96006-0\"><div class=\"eb-accordion-content\">\n\n<div class=\"gb-text cqop-faq-answer\"><div class=\"cqop-v6-pannello-5afcd04 gb-text\">Boiler rooms, heat pumps, air-conditioning systems, distribution networks (radiators, radiant floors), ventilation, refrigeration and solar thermal.<\/div><\/div>\n\n<\/div><\/div><\/div>\n\n\n\n\n\n<div class=\"wp-block-essential-blocks-accordion-item cqop-faq-96006-0-7 eb-accordion-wrapper\" data-clickable=\"false\"><div class=\"eb-accordion-title-wrapper eb-accordion-title-wrapper-cqop-faq-96006-0\" tabindex=\"0\"><div class=\"eb-accordion-title-content-wrap title-content-cqop-faq-96006-0\"><h2 class=\"eb-accordion-title\">Does the Green Homes Directive require boilers to be replaced?<\/h2><\/div><\/div><div class=\"eb-accordion-content-wrapper eb-accordion-content-wrapper-cqop-faq-96006-0\"><div class=\"eb-accordion-content\">\n\n<div class=\"gb-text cqop-faq-answer\"><div class=\"cqop-v6-pannello-5afcd04 gb-text\">No. It sets consumption reduction targets for each country\u2019s entire building stock, not obligations for individual owners.<\/div><\/div>\n\n<\/div><\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-5e842af\">\n\n<svg focusable=\"false\" role=\"presentation\" aria-hidden=\"true\" class=\"cqop-v6-icona-71ff866\">\n      <defs>\n        <pattern id=\"mattoniOS28\" width=\"72\" height=\"36\" patternUnits=\"userSpaceOnUse\">\n          <rect x=\"0\" y=\"2\" width=\"32\" height=\"14\" fill=\"rgba(255,255,255,0.022)\"><\/rect>\n          <rect x=\"36\" y=\"2\" width=\"32\" height=\"14\" fill=\"rgba(255,255,255,0.022)\"><\/rect>\n          <rect x=\"18\" y=\"20\" width=\"32\" height=\"14\" fill=\"rgba(255,255,255,0.022)\"><\/rect>\n          <rect x=\"-18\" y=\"20\" width=\"32\" height=\"14\" fill=\"rgba(255,255,255,0.022)\"><\/rect>\n          <rect x=\"54\" y=\"20\" width=\"32\" height=\"14\" fill=\"rgba(255,255,255,0.022)\"><\/rect>\n        <\/pattern>\n      <\/defs>\n      <rect width=\"100%\" height=\"100%\" fill=\"url(#mattoniOS28)\"><\/rect>\n    <\/svg>\n\n\n\n\n\n<div class=\"cqop-v6-griglia-7a21026\">\n\n<div>\n\n<h2 class=\"gb-text cqop-v6-titolo-1522a9c\">Your next move?<\/h2>\n\n\n\n\n<p class=\"gb-text cqop-v6-testo-2d399db\"><strong class=\"cqop-v6-pannello-cff7b97\">Demonstrate your requirements<\/strong> and turn this knowledge into action: make sure you have the right SOA qualification and don\u2019t hesitate to invest in training and innovation.<\/p>\n<\/div>\n\n\n\n\n\n<div class=\"cqop-v6-pannello-4cdb9ad\">\n\n<a class=\"gb-text cqop-v6-pulsante-5eba899 cqop-v6-state-f859560\" href=\"https:\/\/www.cqop.com\/en\/contacts\/\">Contact us<\/a>\n\n\n\n\n\n<a class=\"gb-text cqop-v6-pulsante-0678f05 cqop-v6-state-b958ab0\" href=\"https:\/\/www.cqop.com\/en\/online-services\/fee-and-requirements-calculation\/\">Calculate fees and requirements<\/a>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>OS28 Specialised works categories SOA category OS28 Heating and air-conditioning systems OS28 covers heating and air-conditioning systems: supply, installation, maintenance and renovation of heating, air-conditioning and refrigeration systems. It ranges from domestic heat pumps to large office systems, through to industrial refrigeration and solar thermal. Together with OS3 and OS30, forms part of the general &#8230; <a title=\"SOA category OS28\" class=\"read-more\" href=\"https:\/\/www.cqop.com\/en\/list-of-soa-categories\/specialised-works\/os28\/\" aria-label=\"Read more about SOA category OS28\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":920978,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_eb_attr":"","_eb_data_table":"","footnotes":""},"class_list":["post-920985","page","type-page","status-publish"],"acf":{"h1_seo":""},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/pages\/920985","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/comments?post=920985"}],"version-history":[{"count":8,"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/pages\/920985\/revisions"}],"predecessor-version":[{"id":922319,"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/pages\/920985\/revisions\/922319"}],"up":[{"embeddable":true,"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/pages\/920978"}],"wp:attachment":[{"href":"https:\/\/www.cqop.com\/en\/wp-json\/wp\/v2\/media?parent=920985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}