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CIBSE Guide B1: Heating

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This volume, is part of “CIBSE Guide B: Heating, Ventilating, Air Conditioning and Refrigeration”, providing guidance on the practical design of heating, ventilation and air conditioning (HVAC) systems. The guide, released by the Chartered Institution of Building Services Engineers (CIBSE), was published in five separate chapters. The specific chapter deals with the selection, design, commissioning, operation and management of most types of heating systems in buildings. It focuses specifically on nondomestic buildings; however, much of the contents will apply to domestic communal heating. 


Contents include: 


  • 1.1 Introduction

1.1.1 General
1.1.2 Other CIBSE publications


  • 1.2 Strategic design decisions

1.2.1 General
1.2.2 Purposes of heating systems
1.2.3 External design conditions
1.2.4 Siterelated issues
1.2.5 Interaction with building design, fabric, services and facilities
1.2.6 Occupancy
1.2.7 UK regulatory requirements
1.2.8 Energy performance of building regulations outside the UK
1.2.9 Environmental performance targets
1.2.10 Economic considerations
1.2.11 Future requirements


  • 1.3 Design criteria

1.3.1 General
1.3.2 Internal design conditions
1.3.3 Design criteria for human comfort and well being
1.3.4 Design criteria for other than human comfort
1.3.5 Environmental performance target
1.3.6 Part L Building Regulations 2013 (England)
1.3.7 Energy and CO2 emissions benchmarks for existing buildings
1.3.8 NOx, SOx, particulates and greenhouse gases other than CO2
1.3.9 Environmental assessment schemes


  • 1.4 Choice of system

1.4.1 General
1.4.2 System classification
1.4.3 Choice of centralised or decentralised systems
1.4.4 Particular applications
1.4.5 Choice of fuel or energy source
1.4.6 Choice of heat generator
1.4.7 Choice of heat emitters
1.4.8 Choice of distribution medium
1.4.9 Choice of domestic hot water system


  • 1.5 Heating load calculations and sizing methodology

1.5.1 General
1.5.2 Calculation principles
1.5.3 Room design heating load
1.5.4 Mechanical ventilation heat loss
1.5.5 Domestic hot water
1.5.6 Distribution losses
1.5.7 Heat generator peak heating load
1.5.8 Design margins
1.5.9 Choice of number and duties of heat generators


  • 1.6 Energy sources

1.6.1 General
1.6.2 Factors affecting choice of energy source
1.6.3 Gaseous fuels
1.6.4 Liquid fuels
1.6.5 Solid fuels
1.6.6 Electricity
1.6.7 Solar source
1.6.8 Handling and storage of fuels and regulations


  • 1.7 Heat generators

1.7.1 Choice of heat source
1.7.2 Boilers
1.7.3 Gasfired boilers
1.7.4 Oil fired boilers
1.7.5 Solid fuel boilers (general)
1.7.6 Solid fuel boilers (biomass)
1.7.7 Steam boilers
1.7.8 Combustion of fuels
1.7.9 Heat pumps
1.7.10 Combined heat and power
1.7.11 Solar water heating collectors
1.7.12 Chimneys and flues
1.7.13 Corrosion in boilers, flues and chimneys

  • 1.8 Hydronic systems

1.8.1 General
1.8.2 Choice of flow and return water temperatures
1.8.3 General arrangement of LTHW systems
1.8.4 Secondary circuit(s)
1.8.5 Primary circuit
1.8.6 Interface between primary and secondary circuits
1.8.7 General arrangement of MTHW and HTHW systems
1.8.8 Integration of renewable/low carbon heat generators
1.8.9 Heat output rate of heat emitters

  • 1.9 Steam systems

1.9.1 General
1.9.2 System design
1.9.3 Distribution
1.9.4 Condensate
1.9.5 Guidance and standards

  • 1.10 Air systems

1.10.1 General
1.10.2 Heat sources
1.10.3 Distribution
1.10.4 Heating combined with air conditioning
1.10.5 Controls
1.10.6 Other standards and guidance

  • 1.11 Unitary systems

1.11.1 General
1.11.2 Indirect gas and oilfired heaters
1.11.3 Direct electric heaters
1.11.4 Electric underfloor heating
1.11.5 Standalone heat pumps
1.11.6 Radiant systems characteristics
1.11.7 Convective heating characteristics
1.11.8 Controls

  • 1.12 Domestic hot water systems

1.12.1 General
1.12.2 Classification of DHW systems
1.12.3 Regulations relevant to DHW systems
1.12.4 Generic dhw systems
1.12.5 Choice of dhw system
1.12.6 dhw demand and energy consumption
1.12.7 Solar hot water heating
1.12.8 Sizing of dhw systems

  • 1.13 Connecting to heat networks

1.13.1 Introduction
1.13.2 Existing UK heat network performance
1.13.3 Key design points for heat networks
1.13.4 Networkconsumer interface
1.13.5 Implications for design of building heating system

  • 1.14 Operation, maintenance and energy management

1.14.1 General
1.14.2 ‘Commissionability’ and ‘maintainability’
1.14.3 Life cycle issues
1.14.4 Construction (Design and Management) Regulations (UK)
1.14.5 Operation and maintenance manuals
1.14.6 Log books
1.14.7 Energy management, monitoring and targeting


For more information please visit the CIBSE website.


Further information on chapters: "B0: Applications and activities: HVAC strategies for common building types", "B2: Ventilation and Ductwork" and "B3: Air Conditioning and Refrigeration" can also be found at the BUILD UP portal.