Contract: EIE/07/069/SI Duration: October 2007 – March 2010Version: July 7, 2009 Ventilation for buildings Energy performance of buildings Guidelines for inspection of air-conditioning systems- EN Jorma RAILIO FAMBSI, Finland

slide 2 Outline The EU CENSE project Inspections of air conditioning and ventilation systems - Background Scope of the Standard Principle of the method Reporting Annexes Feedback and future perspectives

slide 3 The EU CENSE project (Oct March 2010) Aim of the project: To accelerate adoption and improved effectiveness of the EPBD related CEN- standards in the EU Member States These standards were successively published in the years and are being implemented or planned to be implemented in many EU Member States. However, the full implementation is not a trivial task Main project activities: A.To widely communicate role, status and content of these standards; to provide guidance on the implementation B.To collect comments and good practice examples from Member States aiming to remove obstacles C.To prepare recommendations to CEN for a “second generation” of standards on the integrated energy performance of buildings

slide 4 Brief introduction A brief introduction to the CENSE project and the CEN-EPBD standards is provided in a separate presentation:

slide 5 More information More information and downloads: Disclaimer: CENSE has received funding from the Community’s Intelligent Energy Europe programme under the contract EIE/07/069/SI The content of this presentation reflects the authors view. The author(s) and the European Commission are not liable for any use that may be made of the information contained therein. Moreover, because this is an interim result of the project: any conclusions are only preliminary and may change in the course of the project based on further feedback from the contributors, additional collected information and/or increased insight.

slide 6 Inspections of air conditioning and ventilation systems - Background Article 9 of the EPBD requires measures to establish a regular inspection of air-conditioning systems of an effective rated output of more than 12 kW. According to Article 10, these inspections shall be carried out by qualified experts in an independent manner.

slide 7 Background Why guidelines for the inspection of air conditioning systems ? Considering the impact of air conditioning on the energy consumption of the buildings, CEN has decided to develop a methodology concerning the inspection of air conditioning systems. Why a European standard ? Make possible to harmonise the various inspection principles, methods and practices in buildings between the Member States Increase the accessibility, transparency and objectivity of the assessment

slide 8 “AIR CONDITIONING SYSTEM” (EPBD Article 2) “a combination of all components required to provide a form of air treatment in which temperature is controlled, possibly in combination with the control of ventilation, humidity and air cleanliness” ventilation and its controls, if integrated in the system, are included

ARTICLE 9 : INSPECTION OF AIR-CONDITIONING SYSTEMS ”With regard to reducing energy consumption and limiting carbon dioxide emissions, Member States shall lay down the necessary measures to establish a regular inspection of airconditioning systems of an effective rated output of more than 12 kW. ” ”This inspection shall include an assessment of the air-conditioning efficiency and the sizing compared to the cooling requirements of the building. Appropriate advice shall be provided to the users on possible improvement or replacement of the air-conditioning system and on alternative solutions.”

slide 10 EN – main issues 4 INSPECTION PROCEDURE Pre-inspection and document collection Documents Building and system survey Advice in case of outdated, incomplete or missing documentation Methodology Inspection of the refrigeration equipment Inspection of pumps and chilled water pipe work Inspection of effectiveness of outdoor heat rejection Insp. of the effectiveness of heat exchange to the refrigeration system Inspection of air delivery systems in treated spaces Inspection of air delivery systems at air handling units and ductwork Inspection of air inlets to the system Inspection of the building system controls and control parameters Metering Reporting

slide 11 EN – main issues (2) 5 ADVICE ON ALTERNATIVE SOLUTIONS AND IMPROVEMENTS (adaptation to use – load reduction – maintenance improvement -. Correcting functions – replacement – more details in annex H; annex F gives examples of ´checklists – observations, advice)

slide 12 inspection report (just an extract from Annex G) --- Overall energy use and energy efficiency of the system -conclusive parameters to be presented when applicable: specific fan power (SFP) and hours of operation; heat or cooling load; energy use for heating of supply air (including control); energy use for cooling of supply air (including control); performance of heat recovery devices and the performance of the system regarding desired and achieved indoor air quality by parameters such as: airflow rates, draught, CO2 concentration in occupied zones and noise levels. energy use for pumps energy use for other cooling loads (chilled beams) heat or cooling capacity ---

slide 13 EN 15240, Annexes Examples of subsystems of air conditioning systems Examples of inspection classes of air conditioning systems Features affecting the frequency and duration of inspection Checklist of pre–inspection information Recommendations for the extent of the inspection (example – inspection classes applied) Examples of checklists indicating observations and appropriate actions or advice Inspection report, example of contents Energy impacts…(not yet quantified, only addressed)

slide 14 Experiences legislation new – further guidance still in preparation (with just a few exceptions) frequency: 5 or 10 years typical, may depend on size existing buildings – the big question –good maintenance to be encouraged –systematic approach needed for systems where knowledge or documents lacking

slide 15 Inspections – further developments Definition of ”air conditioning system” – rewording proposed, also to include ventilation More emphasis on inspection reports -recommendations for improvements -independent control for inspection reports

slide 16 More information More information and downloads: Disclaimer: CENSE has received funding from the Community’s Intelligent Energy Europe programme under the contract EIE/07/069/SI The content of this presentation reflects the authors view. The author(s) and the European Commission are not liable for any use that may be made of the information contained therein. Moreover, because this is an interim result of the project: any conclusions are only preliminary and may change in the course of the project based on further feedback from the contributors, additional collected information and/or increased insight.