CIBSE Domestic Heat Pump Design and Installation Guide (2026) pdf

Contents

Note from the publisher

Contributions

Foreword

Introduction

000 General notes

Note 000: General cover note

Note 001: Completing the system criteria document

100 Survey workflow and notes

Note 100: Survey cover note

Note 101: Assessing an existing system

Note 110: Customer requirements

Note 111: Occupancy

Note 112: Complete system replacement

Note 113: Assessing fabric improvements for heat pump readiness

Note 120: Electrical supply

Note 121: Electrical circuits

Note 122: Distribution network operator (DNO) notification

Note 130: Connecting pipe runs

Note 140: Installation location

Note 141: Noise

Note 142: Safe access

Note 143: Space and structural support

Note 144: Clearances to openings

Note 145: Clearances to ignition sources

Note 150: Circulation clearances

Note 151: Humidity

Note 152: Localised cold areas

Note 153: Protective coatings

Note 190: Notification of installations

Note 191: Planning permission

200 Heat loss workflow and notes

Note 200: Heat loss cover note

Note 201: Principles of heat loss assessment

Note 210: Air permeability assessment

Note 211: Outdoor design temperature selection

Note 212: Measuring the room

Note 213: Assessing the room construction

Note 214: Indoor design temperature selection

Note 230: Room heat loss assessment

Note 231: Building heat loss assessment

300 Sizing of new heat emitter workflow and notes

Note 300: New heat emitter sizing cover note

Note 310: Types of heat emitter

Note 311: Types of heat emitter — other than steel panel radiators and underfloor heating

Note 312: System flow temperatures higher than 55°C

Note 313: Calculating the required flow rate

Note 320: Radiator catalogue to actual output conversion

Note 321: Calculation of radiator resistance

Note 340: New steel panel radiator selection process

Note 341: New underfloor heating selection process

400 Sizing of reused heat emitter workflow and notes

Note 400: Reused heat emitter sizing cover note

Note 410: Selecting consistent system flow temperatures

Note 411: Reducing heat loss from a space

Note 412: Existing heat emitter assessed as unable to be reused

Note 420: Identifying an existing radiator specification by inspection

Note 421: Identifying an existing radiator specification by approximation

Note 423: Existing radiator flow rate and resistance

Note 424: Existing radiator actual output assessment

Note 425: Sizing additional radiators

Note 430: Assessing existing underfloor heating systems

Note 440: Reused steel panel radiator selection process

Note 441: Reused underfloor heating selection process

500 DHW cylinder sizing workflow and notes

Note 500: Domestic hot water cylinder sizing cover note

Note 510: Target cylinder temperature

Note 512: Scalding protection

Note 520: Cylinder volume sizing

Note 521: Minimum cylinder heat exchanger rating

600 Control strategy workflow and notes

Note 600: Controls cover note

Note 610: Control hardware

Note 611: Third-party control systems

Note 620: Space heating control strategy

Note 621: Zoning

Note 622: Thermostatic radiator valves

Note 623: Weather compensation control

Note 630: Domestic hot water reheat control strategy

Note 631: Domestic hot water priority control

Note 632: Bacterial contamination protection

700 Pipework sizing workflow and notes

Note 700: Pipework sizing cover note

Note 710: System temperatures

Note 720: Pipework routing

Note 721: Pipework layout drawing

Note 722: Heat carrying capacity

Note 723: Pipework sizing

Note 724: Fixtures, fittings and equipment resistance

Note 730: Index circuits

Note 731: Pipework water content

Note 740: Assessing if a low-loss header is required

800 Heat pump and component sizing workflow and notes

Note 800: Heat pump and component sizing cover note

Note 810: Volumisers

Note 811: Hybrid heat pumps

Note 820: AWHP selection

Note 870: Assessing minimum water content

Note 871: Expansion vessel sizing

Note 872: Circulator selection

Note 873: Assessing if thermal storage is required

900 Installation workflow and notes

Note 900: Installation cover note

Note 901: How to read a technical drawing

Note 902: Metering

Note 910: Flammable refrigerants

Note 920: Heat pump unit support

Note 921: Vibration

Note 922: Antifreeze valves

Note 923: Pipework installation

Note 924: Equipment installation

Note 925: Pipe insulation

Note 926: Building penetrations

Note 930: Condensate disposal

Note 980: Pressure testing

Note 981: Cleaning and flushing

Note 982: Water treatment

Note 983: System filling

Note 984: Hydronic balancing

Note 990: Installation

Note 991: Commissioning

Note 992: Handover

Note 993: Service and maintenance

Note 994: Decommissioning

Bibliography

Contributing authors: Adam Tyler, Paul Whitehead, David Smith, Joe Bath, Ryan Kirkwood, Andy Mathews

Executive editor: Tony Lathey