CIBSE Domestic Heating Design Guide (2026)
The new 2026 edition of the Domestic Heating Design Guide responds to a rapidly evolving heating landscape by improving technical accuracy, accountability, and system performance, while aligning with current regulatory expectations, including the Building Safety Act. It introduces the System Criteria Document to provide a clear, auditable record of design decisions, system intent, and professional responsibility. The guide updates heat loss calculations using the latest CIBSE weather data and closer alignment with BS EN 12831-1, adds dedicated guidance on control strategies, revises domestic hot water design in line with BS EN 12831-3, and expands coverage of modern hydraulic and system configurations.
CIBSE Domestic Heating Design Guide (2026)
The new edition incorporates the following:
- Addition of visual flow diagrams for ease of use
- Addition of a new System Criteria document that could record all design decisions, aid in commissioning and encourages the client and designer to sign-off, in line with the Building Safety Act
- Incorporating the latest CIBSE Weather data with 28 zones and four outdoor design temperatures
- Addition of Heat loss assessment method as per the BS EN 12831-1:2017 method
- Updated U-value tables to cover modern construction methods
- Domestic hot water cylinder sizing method as per BS EN 12831-3:2017, coverage of sizing for storage of DHW at less than 60°C, and thermal disinfection procedure.
- Controls section with focus on control strategy and additional guidance around mixed temperature systems
- System Design section with improved coverage of fundamental fluid-dynamics principles, heat emitters other than steel panel radiators), advanced system layouts (such as four-pipe heat generators and manifold distribution), circulator control options, and low-loss headers
Table of Contents:
- 1. Design Process
- 2. Heat Loss Assessment
- 3. Controls
- 4. Domestic Hot Water Provision
- 5. System Design
- Appendix A Background Information
Other Details:
Lead Author: Adam Tyler
Peer Reviewers: Alasdair Donn (Willmott Dixon), Chris Twinn (Twinn Sustainability Innovation), Mark Krull (LCL Awards), Nancy Jonsson (HPA UK), Tony Day (Energy Research Consultant)
Editor: Alasdair Deas
| ISBN | 9781918034196 |
|---|---|
| Publication Status | Current |
| Publication Date | 2026-01-25 |
| Format (Paperback, Hardback etc) | Paperback |
| Publisher | Domestic Building Services Panel |
We offer customers a wide range of delivery options from Free (7-10 working days) ... right up to by Next Day by 9am (subject to location and stock availability).
- Simply choose your preferred service when checking out
- We show "live" stock levels for all publications
- Orders received after 3:45pm will be processed on the next working day.
- Unless specifically requested, our delivery partners will not attempt a weekend delivery
We offer all customers a "No Quibble" 28 day returns policy.
If you need to return a title for any reason ...
- Contact our customer services team first to explain what you are returning and the reason
- Request a Returns Authorisation Number
- We will email you this and a link to arrange your return quickly & easily via Royal Mail
- Take your return to your nearest Post Office and they will do the rest
Please refer to our Returns page for full details & charges.