Contract: EIE/07/069/SI Duration: October 2007 – March 2010Version: July 7, 2009 Ventilation for non-residential buildings - Performance requirements for ventilation and room-conditioning systems EN Hicham LAHMIDI CSTB / France

slide 2 Outline The EU CENSE project Scope of the Standard What is needed for ventilation design What is the ventilation design based on? Guidelines for mechanical ventilation Guideline for economic aspects Checklist Calculation an application of specific fan power

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 Scope The standard gives the main design criteria and data to take into account in ventilation design

slide 7 What is need for ventilation design The ventilation design is based on 3 types of data and parameters : The design criteria : regroups the data needed for design, including those not directly related to indoor air and ventilation systems; e.g : the construction data, the use of the room, the systems requirement in terms of control and maintenance The classification data : regroups the different classifications and specification of air, the different type of system functions, and data on system functioning and system energy performance, such as pressure conditions, specific fan power or heat recovery. The indoor environment : defines the operative temperature, the thermal environment, the main actors of indoor air quality, the indoor air humidity, the acoustic environment, the internal loads

slide 8 What is the ventilation design based on? Parameters taken into accountComments General building characteristics, construction dataContains geometrical description, outdoor conditions, climatic data Use of the roomHuman occupancy with schedule and clothing, internal heat gains Requirement in the roomsAir quality and control characteristics, air velocity, noise level, lighting level Control and monitoringSpecific check of the energy consumption, foresee adaptation of systems Maintenance and safety operationEfficiency of systems in time, and security of users Life processDefines the different steps in the system’s life The design parameters to take into account

slide 9 Classification of certain input data (1/2) Parameters taken into accountComments Types of airDescribes the different air types and visual convention for schemes Quality of the different type of airMainly gives the different pollution level or CO 2 rate to consider for extract and exhaust air, outdoor air, supply air, indoor air Systems tasks and basic system typesClassification of systems following the type of control. Pressure conditionCategorization of the pressure condition from the relationship between supply and extract air flows Fan powerDifferent categories of fan according to their power and their system efficiency. Heat recoveryCategories of heat recovery types are described in other standards Definition of the occupied zoneHow to measure the dimension of the occupied zone. Thermal environmentDefinition of the operative temperature

slide 10 Parameters taken into accountComments Indoor air qualityDesign data for occupancy Design criteria for supply air flow rates considering human occupancy and other emissions and heating and cooling loads Indoor air humidityAssumes that human occupancy is the only source of humidity for most applications Acoustic environmentAll sources of noise must be taken into account Internal loadsHuman activities Lighting Equipment Classification of certain input data (2/2)

slide 11 Guidelines for mechanical ventilation Annex A gives guidelines established for mechanical ventilation and air-conditioning systems for building subject to human occupancy. The user will find there some design values and recommendations (for proper consideration of outdoor air quality, selection of air filters and heat recovery, pressure conditions in the system and building, space requirements and accessibility of equipment) to set up the appropriate ventilation system on the building. Guideline for economic aspects Annex B explains the basis of the present value method to evaluate the net present cost of a certain investment. It refers to another standard for details.

slide 12 Checklist An example of a checklist is given in Annex C. This is a list of items to be taken into account in the installation design. This checklist is devided in the following parts : Checklist for the planning of the building Checklist for the planning of the HVAC-system Checklist for the designing of individual components Checklist for the use of the system Calculation an application of specific fan power Annex D defines how to calculate the specific fan power (SFP) of fans and air handling units (AHU). The calculated parameters are : The specific fan power for individual fans and AHUs The weighted SFP value for the whole building in real operating conditions

slide 13 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.