Building energy metering (TM39)

Ellen Salazar

• Publisher: The Chartered Institution of Building Services Engineers
• Year: 2009
• eBook ISBN: 9781906846114
• Topic: Technology & Engineering
• Subtopic: Construction & Architectural Engineering
• Index: Technology & Engineering

This publication was first issued in 2006, based on the Energy Efficiency Best Practice Programme's General Information Leaflet GIL065, to provide guidance for designers of new non-domestic buildings on meeting the metering requirements of Part L of the Building Regulations. This revision provides good-practice guidance covering the general application of building energy metering, in addition to the metering requirements of the Building Regulations for England and Wales and for Northern Ireland, and the Scottish Building Standards.As well as the metering requirements in Building Regulations and standards, the Energy Performance of Buildings Regulations 2007 introduces further energy metering requirements. Additional imminent challenges include the proposed revisions to Part L of the Building Regulations and the introduction of the detailed requirements for the Carbon Reduction Commitment (CRC). This will apply to all organisations that use more than 6000 MW·h per year. There may also be additional metering requirements arising from the recasting of the Energy Performance of Buildings Directive.Previous versions of TM39 have also included energy estimation techniques. Although these are not 'metering' in the strictest sense, they provide valuable energy management data. However, this edition of TM39 focuses on the actual metering requirements, and so the energy estimation techniques previously included in TM39 will in future be included in CIBSE TM22: Energy assessment and reporting method. Additionally, the British Property Federation has developed an energy management tool called LES-TER, which stands for Landlord's Energy Statement, Tenant's Energy Review.This is a voluntary scheme to support energy management in multi-tenanted office buildings, which has raised awareness of the difficulty of quantifying the division between the energy used by the landlord and the tenant(s), particularly in existing buildings that do not lend themselves easily to retrofitting direct metering for this purpose. In this situation, it tends to be as, if not more, important to know what is happening in each tenancy rather than what is happening at a whole-building level, with a breakdown by end-use.GIL065 and the 2006 edition of TM39 suggested strategies for addressing individual tenancies within a building. This new edition of TM39 provides a more general, less prescriptive approach to energy metering for both new and existing buildings, allowing designers and facilities managers to develop a metering strategy which is tailored to meet the particular requirements of a specific project.The aims of TM39 are as follows: — For new buildings and existing buildings being altered or extended: to show ways of demonstrating compliance with relevant building regulations.— For new and existing buildings: to show ways of meeting the statutory requirements for DECs as well as any future legislation, such as the Carbon Reduction Commitment and changes to the Energy Performance of Buildings Directive and its implementing regulations.— For all buildings: to indicate good practice metering strategies and implementations to underpin proactive building energy management.It is worth noting that, although water usage in buildings is of growing importance, due to both increased costs and increased environmental factors, this update of TM39 relates to the metering of energy and does not include water.

Table of contents

• TM39 Building energy metering OFC
• Foreword
• Contents
• 1 Introduction
• 2 Costs and benefits of submetering
• 3 Overview of TM39 metering methodology
• 4 Methodology
• 5 Analysis of meter readings
• References
• Appendix A1: Case studies
• Appendix A2: Alignment and synchronicity requirements for DECs