[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"hub-part-en-part-4-7-cer":3,"$f2fduox5y9si9r":223,"$f13cypio6dlew1":311,"newsroom-has-articles-en":369,"seminar-cards-en":372},{"number":4,"slug":5,"slugEn":6,"group":7,"designation":8,"title":9,"edition":10,"vde":11,"iso":12,"checkedAt":13,"revisionOngoing":14,"intro":15,"about":27,"requirements":32,"misconceptions":79,"practice":94,"status":123,"faq":142,"seminars":177,"sources":184,"terms":189,"glossary":205,"prev":211,"next":217},"4-7","teil-4-7-cer","part-4-7-cer","kpi","EN 50600-4-7","Cooling Efficiency Ratio (CER)","2020-11","VDE 0801-600-4-7","ISO\u002FIEC 30134-7","2026-09-17",false,{"segments":16,"ref":26},[17,20,24],{"type":18,"html":19},"html","EN 50600-4-7 defines the ",{"type":21,"text":22,"anchor":23},"term","cooling efficiency ratio","cer",{"type":18,"html":25}," (CER): the ratio of the heat removed from the data center to the electrical energy that the cooling system consumes to do so. Since 2024, the German Energy Efficiency Act (EnEfG) has required this indicator as an entry for the German energy efficiency register for data centers (Energieeffizienzregister).",null,{"segments":28,"ref":31},[29],{"type":18,"html":30},"Part 4-7 establishes the CER as an indicator for the cooling infrastructure, describes measurement, calculation, and reporting, and explains how to read the value. It is aimed at data center managers, operations managers, ICT managers, and general contractors. The CER assesses cooling as a subsystem within the data center boundaries; the standard does not set a limit or target value, and individual indicators are not combined into an overall score","(EN 50600-4-7:2020, Introduction, Clauses 1 and 4).",[33,40,47,53,60,72],{"title":34,"text":35},"The CER is an annual value in kilowatt-hours per kilowatt-hour.",{"segments":36,"ref":39},[37],{"type":18,"html":38},"The numerator is the total quantity of heat removed, the denominator the energy consumption of the cooling systems, both for the same twelve months. The standard leaves the measurement frequency open; it only determines when the next rolling annual value is available.","Clauses 5.1 and 6.1.",{"title":41,"text":42},"The heat is measured in the cooling medium, not taken as the cooling capacity from the data sheet.",{"segments":43,"ref":46},[44],{"type":18,"html":45},"Volume and heat capacity of the coolant must be recorded; with direct free cooling, humidity as well. Redundant pipes are measured individually.","Clause 6.2.",{"title":48,"text":49},"The denominator includes the entire cooling chain.",{"segments":50,"ref":46},[51],{"type":18,"html":52},"Pumps, valves, and all other components of the cooling infrastructure count; energy is measured in kilowatt-hours, not power in kilowatts.",{"title":54,"text":55},"A report states the data center with its system boundary, the value, and the end date.",{"segments":56,"ref":59},[57],{"type":18,"html":58},"Externally, the CER is only communicated together with the cooling conditions, such as direct free cooling or water use; for these conditions, the associated indicators should be reported as well.","Clauses 7.1 and 7.2.",{"title":61,"text":62},"Shorter periods are called iCER, snapshot values CPR.",{"segments":63,"ref":71},[64,66,69],{"type":18,"html":65},"The interim CER carries the measurement period in its name; the ",{"type":21,"text":67,"anchor":68},"cooling performance ratio","cpr-cef",{"type":18,"html":70}," (CPR) relates heat load and electrical power at the same point in time and is used for capacity management.","Annex D.1 and D.2.",{"title":73,"text":74},"The reciprocal, CEF, shows the effort per subsystem.",{"segments":75,"ref":78},[76],{"type":18,"html":77},"Expressed as a percentage of the heat removed, the cooling efficiency factor can be applied individually to computer room air conditioning units, chiller, and dry cooler and shows which link in the chain consumes the electricity.","Annex D.3.",[80,87],{"statement":81,"text":82},"“The CER is the COP of our chiller.”",{"segments":83,"ref":86},[84],{"type":18,"html":85},"The coefficient of performance (COP) describes a machine under fixed test conditions, the CER the entire cooling infrastructure over one year under real outdoor temperatures and part loads. From seminar practice: the comparison helps as an introduction, but the annual value follows the share of free cooling, not the catalog value of the machine","(Annex A.2, D.2).",{"statement":88,"text":89},"“The nameplates of the cooling equipment are enough to size the power supply.”",{"segments":90,"ref":93},[91],{"type":18,"html":92},"The peak load of the cooling depends on IT load and outdoor air temperature, and manufacturer data deviate in real operation. In projects, we often see that the minimum of the CPR shows the actual peak demand better than the sum of the nameplates","(Annex D.2.3.2, D.2.4).",{"heading":95,"items":96,"closing":117},"Where Part 4-7 applies in a project",[97,104,110],{"label":98,"text":99},"Planning",{"segments":100,"ref":103},[101],{"type":18,"html":102},"Site and temperature concept determine the hours of free cooling and thus the annual CER; higher coolant temperatures extend free cooling operation, from seminar practice roughly by two weeks per kelvin","(Annex C.1).",{"label":105,"text":106},"Law",{"segments":107,"ref":26},[108],{"type":18,"html":109},"The EnEfG requires operators to submit information for the energy efficiency register annually by 31 March, including the efficiency of the cooling system according to DIN EN 50600-4-7 (Section 13(1), Annex 3).",{"label":111,"text":112},"Operation",{"segments":113,"ref":116},[114],{"type":18,"html":115},"The iCER, plotted against the outdoor temperature, makes the effect of an optimization visible; meters with remote reading and data history are the prerequisite","(Clauses 6.3 and 7.3).",[118],{"segments":119,"ref":122},[120],{"type":18,"html":121},"This protects you from a cooling system that is efficient on paper and delivers a different value in the register","(Clause 6.2).",[124,130,136],{"label":125,"text":126,"draft":26,"draftDate":26},"Current edition",{"segments":127,"ref":26},[128],{"type":18,"html":129},"DIN EN 50600-4-7:2020-11, German edition of EN 50600-4-7:2020, approved by CENELEC on 10 February 2020.",{"label":131,"text":132,"draft":26,"draftDate":26},"International",{"segments":133,"ref":26},[134],{"type":18,"html":135},"ISO\u002FIEC 30134-7; the correspondence is stated in the national annexes of the German editions of Parts 4-8 and 4-9, not in a legal source.",{"label":137,"text":138,"draft":26,"draftDate":26},"Revision",{"segments":139,"ref":26},[140],{"type":18,"html":141},"No ongoing revision known. Committee CLC\u002FTC 215, nationally DKE\u002FGK 719.",[143,150,157,163,170],{"question":144,"answer":145},"What is the CER according to EN 50600-4-7?",{"segments":146,"ref":149},[147],{"type":18,"html":148},"The ratio of the heat removed from the data center per year to the annual electricity consumption of the cooling systems, both in kilowatt-hours","(Clause 5.1).",{"question":151,"answer":152},"Is the CER the same as the pPUE of the cooling?",{"segments":153,"ref":156},[154],{"type":18,"html":155},"No. The partial PUE always lies between 1 and the PUE of the data center and responds little to improvements; the CER directly measures the heat removed per kilowatt-hour used","(Annex A.1).",{"question":158,"answer":159},"Do I have to report the CER?",{"segments":160,"ref":26},[161],{"type":18,"html":162},"Operators of data centers within the meaning of the EnEfG report the efficiency of the cooling system according to DIN EN 50600-4-7 annually to the energy efficiency register; the act covers data centers with a non-redundant rated connected load of 300 kW or more (Sections 3 and 13(1), Annex 3, as of 13 November 2023).",{"question":164,"answer":165},"How is the CER related to waste heat reuse?",{"segments":166,"ref":169},[167],{"type":18,"html":168},"Energy needed to transport heat across the data center boundary counts in the denominator of the CER; distribution in the building beyond it does not. The reuse itself is assessed by the ERF under Part 4-6","(Annex B.2).",{"question":171,"answer":172},"Can I use the CER to determine the PUE of individual computer rooms?",{"segments":173,"ref":176},[174],{"type":18,"html":175},"Yes, approximately. With a shared cooling infrastructure, the CER can be used to calculate the cooling share per room; the standard names the uncertainties of this method","(Clause 5.2, Annex B.1).",[178,181],{"seminarId":179,"benefit":180},"DC-21008","All indicators of the 4-x series with formulas, system boundaries, and a comparison with the EnEfG; this saves you a register entry with the wrong reference value.",{"seminarId":182,"benefit":183},"DC-21004","Thermodynamics, free cooling, and adiabatic cooling over the course of the year, that is, the variables that determine the CER.",[185,186,12,187,188],"DIN EN 50600-4-7:2020-11 (German edition of EN 50600-4-7:2020), Introduction, Clauses 1, 3.1, 4, 5.1, 5.2, 6.1 to 6.3, 7.1 to 7.3, Annexes A, B, C, D","DIN EN 50600-4-8:2023-08 and DIN EN 50600-4-9:2023-08, national Annex NC of the German edition (relationship with ISO\u002FIEC 30134)","German Energy Efficiency Act (Gesetz zur Steigerung der Energieeffizienz in Deutschland, EnEfG) of 13 November 2023, Section 13, Section 20, Annex 3","DCE academy seminar practice: Data Center Sustainability & Efficiency (session November 2025), Data Center – General Principles (session April 2026), Deep Dive – Power Supply & Cooling (session November 2023)",[190,191,193,195,197,199,201,203],{"label":9,"anchor":23},{"label":192,"anchor":68},"Cooling Performance Ratio (CPR)",{"label":194,"anchor":68},"Cooling Efficiency Factor (CEF)",{"label":196,"anchor":26},"interim CER (iCER)",{"label":198,"anchor":26},"coefficient of performance (COP)",{"label":200,"anchor":26},"free cooling",{"label":202,"anchor":26},"cooling infrastructure",{"label":204,"anchor":26},"German energy efficiency register for data centers (Energieeffizienzregister)",{"cer":206,"cpr-cef":208},{"term":9,"short":207},"Ratio of the heat removed from the data center to the electrical energy the cooling system consumes to remove it.",{"term":209,"short":210},"Cooling Performance Ratio (CPR) and Cooling Efficiency Factor (CEF)","Two 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center.",3,[235,236,237],"praesenz","live-webinar","videokurs",{"id":239,"status":227,"seminar_id":240,"image_main":241,"title":242,"subtitle":243,"slug":244,"short_description":245,"durationDays":246,"formats":247,"formatsOnRequest":14},2,"DC-21002","144bcbbd-cb3e-4ebc-9183-2f5b104b9072","Data Center Design & Implementation","according to EN 50600 and ISO\u002FIEC 22237","data-center-design-implementation","Best practices for designing and implementing data centers according to EN 50600 & ISO\u002FIEC 22237.",5,[235,236],{"id":233,"status":227,"seminar_id":249,"image_main":250,"title":251,"subtitle":26,"slug":252,"short_description":253,"durationDays":246,"formats":254,"formatsOnRequest":14},"DC-21003","b94540de-de24-4383-9c44-0c4207e91a14","Data Center Operations – Professional","data-center-operations-professional","Best practices and case studies provide a deep understanding of the necessary processes and systems to operate a data center efficiently and effectively.",[235,236],{"id":256,"status":227,"seminar_id":182,"image_main":257,"title":258,"subtitle":259,"slug":260,"short_description":261,"durationDays":246,"formats":262,"formatsOnRequest":14},4,"19eb687a-6272-4ff9-b872-2dbcaceb54fd","Deep Dive – Power Supply & Cooling","according to EN 50600","deep-dive-energy-supply-air-conditioning-en-50600","Best practices and case studies provide a deep understanding of the two major trades in the data center.",[235,236],{"id":246,"status":227,"seminar_id":264,"image_main":265,"title":266,"subtitle":267,"slug":268,"short_description":269,"durationDays":246,"formats":270,"formatsOnRequest":14},"DC-21006","5ce01d58-7ac1-494b-a8e1-3cc752d338b7","Data Center Migration","moving IT from an existing facility to a new build","data-center-migration","Navigate safely through the complex journey of data center migration.",[235],{"id":272,"status":227,"seminar_id":179,"image_main":273,"title":274,"subtitle":26,"slug":275,"short_description":276,"durationDays":246,"formats":277,"formatsOnRequest":14},6,"22658b8c-b308-4ce5-a485-be638aa25ebe","Data Center Sustainability & Efficiency","data-center-sustainability-efficiency","Legal foundations, criteria catalogs, developments, and technical solutions",[235],{"id":279,"status":227,"seminar_id":280,"image_main":281,"title":282,"subtitle":26,"slug":283,"short_description":284,"durationDays":226,"formats":285,"formatsOnRequest":286},7,"DC-21009","4c7858fc-30cf-4d07-8e96-cd2c03057f76","Update – EN 50600 and ISO\u002FIEC 22237‑x","update-en-50600-iso-iec-22237-x","The most important changes and differences from the previous standards of the EN 50600 series as well as the major differences between the European and international versions.",[235,236],true,{"id":288,"status":227,"seminar_id":289,"image_main":290,"title":291,"subtitle":292,"slug":293,"short_description":294,"durationDays":233,"formats":295,"formatsOnRequest":14},9,"DC-21010","d87cc210-19f8-4fc2-8ba3-3bfceb69817c","Energy Management According to ISO 50001","for data centers under Section 12 EnEfG","energy-management-din-en-50001","Legally compliant implementation of the Energy Efficiency Act for data centers",[235],{"id":297,"status":227,"seminar_id":298,"image_main":299,"title":300,"subtitle":26,"slug":301,"short_description":26,"durationDays":233,"formats":302,"formatsOnRequest":14},10,"DC-21011","814710db-8b32-40f8-8137-b0fea109c79b","Liquid Cooling, DC Power and High-Bandwidth Cabling","liquid-cooling-dc-power-high-bandwidth-cabling",[235],{"id":304,"status":227,"seminar_id":305,"image_main":306,"title":307,"subtitle":26,"slug":308,"short_description":309,"durationDays":226,"formats":310,"formatsOnRequest":14},8,"DCS-23001","83d21d07-5ee9-4726-a8a0-a32cec614e66","Data Center Passport","data-center-passport","Basic understanding of data centers, structure, components, and trades. Orientation and behavioral guidelines for working in data centers.",[236],{"data":312},[313,326,338,349,359],{"id":314,"status":227,"sort":226,"slug":315,"position":316,"cv":317,"linkedin":318,"phone":319,"signature_email":320,"first_name":321,"last_name":322,"avatar":323,"profile":324},"9eff7954-eeab-4a8f-96d7-fd578be1b1b1","thomas-wawra","CEO","\u003Cp>Dipl. Ing. Thomas Wawra gründete 2007 die DCE academy und entwickelte Sie zum führenden Anbieter von herstellerneutralen Schulungen im Bereich Rechenzentrum basierend auf der Norm EN 50600. Als Sponsor unterstützt er aktiv die Internationalisierung der Norm zur ISO 22237 und referiert weltweit auf Kongressen zu Normierungsfragen.\u003C\u002Fp>\n\u003Cp>In den Jahren 2002 bis 2006 war Thomas Wawra Gesamtverantwortlicher für das Auslandsgeschäft der Venali Inc., Miami, USA. In dieser Zeit leitete er den gesamten Bereich Vertrieb und baute strategische Partnerschaften mit Unternehmen wie, Microsoft und SAP erfolgreich auf. Davor bekleidete er die Position des Geschäftsführers der Venali Europe GmbH, einem Start Up Unternehmen im Bereich Secure Messaging. In dieser Rolle trug er ebenfalls maßgeblich zum Erfolg des Unternehmens bei und eröffnete im Zeitraum von 1996 bis 2007 die Niederlassungen in London, Singapur und Deutschland. Zudem zeichnete er für die Konzipierung und Umsetzung des gesamten Vertriebskonzeptes verantwortlich und war an der Sicherung der Finanzierung durch die Gewinnung von Venture Capital-Gebern sowie Business Angels wesentlich beteiligt.\u003C\u002Fp>\n\u003Cp>Thomas Wawra ist diplomierter Maschinenbauingenieur der Technischen Universität München.\u003C\u002Fp>","https:\u002F\u002Fwww.linkedin.com\u002Fin\u002Fthomas-wawra-a780425\u002F","+49 163 6010442","thomas.wawra@dce-academy.com","Thomas","Wawra","0afd33cf-4d17-49f6-9dfa-f71b65dc15db",{"kind":325,"slug":315},"team",{"id":327,"status":227,"sort":239,"slug":328,"position":329,"cv":330,"linkedin":331,"phone":332,"signature_email":333,"first_name":334,"last_name":335,"avatar":336,"profile":337},"adc4834c-325d-45ca-bb3e-d3eeb380b962","sebastian-galleitner","CMO & CTO","\u003Cp>Sebastian Galleitner verfügt über mehr als 25 Jahre Expertise im strategischen Marketing und in der Entwicklung digitaler Lösungen. Als Chief Marketing Officer der DCE academy verantwortet er die gesamte Kommunikationsstrategie und Markenführung der Academy.\u003C\u002Fp>\u003Cp>Sein fachlicher Hintergrund umfasst umfangreiche Erfahrung in der Konzeption und Umsetzung komplexer Marketingstrategien für technologieorientierte Unternehmen. Diese Fachkompetenz ergänzt ideal die herstellerunabhängige, technische Expertise der DCE academy im Rechenzentrumsbereich.\u003C\u002Fp>\u003Cp>In seiner Funktion sorgt er dafür, dass die präzisen Schulungsangebote ihre Zielgruppen erreichen und die DCE academy als führende Autorität für Rechenzentrumsexpertise wahrgenommen wird. Dabei setzt er auf eine systematische, faktenbasierte Kommunikation, die den hohen Qualitätsanspruch der Ausbildungen widerspiegelt.\u003C\u002Fp>\u003Cp>Vor seiner Tätigkeit für die DCE academy hat Sebastian Galleitner erfolgreich Marketingstrategien für namhafte Unternehmen in der Finanz- und Automobilbranche entwickelt und ist mit den besonderen Anforderungen technisch anspruchsvoller B2B-Kommunikation bestens vertraut.\u003C\u002Fp>\u003Cp>Die Verbindung aus methodischem Marketing-Know-how und Verständnis für technische Zusammenhänge ermöglicht es ihm, die komplexen Inhalte der Schulungen zielgruppengerecht aufzubereiten und den besonderen Wert der praxisorientierten Wissensvermittlung zu kommunizieren.\u003C\u002Fp>","https:\u002F\u002Fwww.linkedin.com\u002Fin\u002Fsebastian-galleitner\u002F","+491749793327","sebastian.galleitner@dce-academy.com","Sebastian","Galleitner","d168850c-990d-467a-8150-97954ef803ef",{"kind":325,"slug":328},{"id":339,"status":227,"sort":233,"slug":340,"position":341,"cv":342,"linkedin":343,"phone":26,"signature_email":344,"first_name":345,"last_name":346,"avatar":347,"profile":348},"dd1bebf0-6d1f-4262-9ec4-524ed59d3901","juergen-strate","Chief Education & Alliance Officer","\u003Cp>Jürgen Strate, Dipl.-Ing. der Versorgungstechnik, war als Direktor für Sales & Strategic Business Development für den Geschäftsbereich Site and Facilities Services D\u002FA\u002FCH der IBM Deutschland GmbH verantwortlich. \u003C\u002Fp>\n\u003Cp>Er war seit 1990 Mitarbeiter der IBM Deutschland.  Herr Strate begann seine Karriere bei IBM als Spezialist für Anlagentechnik im Bereich Chemische Verfahrenstechnik im IBM Halbleiterwerk Böblingen\u002FSindelfingen. Anschließend wechselte er in den IBM Bereich Industry Solution verbunden mit der Qualifizierung zum IT-Systemingenieur.\u003C\u002Fp>\n\u003Cp>Seit 1998 gehörte er dem Geschäftsbereich Site and Facilities Services der IBM an.  In verschiedenen Rollen verfügt er seit mehr als 25 Jahren über umfangreiche Erfahrung in der Beratung, Planung und Realisierung von Rechenzentren unter Sicherheits- und Verfügbarkeitsaspekten. Hierzu gehörte auch eine umfassende und professionelle Begleitung von der Rechenzentrumsstrategie über Planung und Realisierung bis zur Indienstsetzung von Rechenzentren. Er hat den Geschäftsbereich Site and Facilities Services für IBM mitgestaltet und aufgebaut sowie die Entwicklung standardisierter Rechenzentrumslösungen für den Mittelstand sowie von Enterprise Datacentern vorangetrieben. Ein besonderer Fokus lag in der Ausgestaltung von energieeffizienten Lösungen sowie der Einhaltung von aktuellen Standards, insbesondere der DIN EN 50600.\u003C\u002Fp>\n\u003Cp>Herr Strate war als Keynote-Speaker und Referent auf Fachveranstaltungen präsent. Er übte in enger Zusammenarbeit mit der DCE academy die Referententätigkeit zu verschiedenen fachlichen Themen im Rechenzentrumsbereich aus.\u003C\u002Fp>\n\u003Cp>IBM Site and Facilities Services plante und realisierte als Generalübernehmer schlüsselfertig sichere, hochverfügbare, modulare, skalierbare, innovative und energieeffiziente Rechenzentren.\u003C\u002Fp>\n\u003Cp>Seit 2021 ist Herr Strate freiberuflich als Referent \u002F Dozent für die DCE academy tätig. \u003C\u002Fp>","https:\u002F\u002Fwww.linkedin.com\u002Fin\u002Fjuergen-strate\u002F","juergen.strate@dce-academy.com","Jürgen","Strate","48a241a8-9ea1-44ff-94dc-ea0fc76ab74b",{"kind":325,"slug":340},{"id":350,"status":227,"sort":256,"slug":351,"position":352,"cv":353,"linkedin":26,"phone":26,"signature_email":354,"first_name":355,"last_name":356,"avatar":357,"profile":358},"e3ce035f-250a-427e-9219-ed262d272263","victor-dadson","Business Development 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