# New in November 2026

## Updates

- We've added a new ['Temperature configuration'](https://help.heatpunk.co.uk/books/faqs/page/how-can-i-choose-between-the-99th-and-996th-percentile-outdoor-design-temperature-odt) modal which allows you to: 
    - Easily switch between 99th and 99.6th percentile outdoor design temperature in a project
    - Customise the mean annual (or ground) temperature and adjoining temperatures of a project;
    - Use temperatures included in the new CIBSE 2026 Domestic Heating Design Guide.
- The [survey task](https://help.heatpunk.co.uk/books/reports-document-storage-and-emails/page/pro-survey-task-and-installation-record) has been extended: 
    - The "Heat emitters section" has a new "Heat emitter photos" subsection. Upload photos here to show on the plan and the technical report.
    - A new "Room details" section has been added, which contains room notes and photos. They're also shown on the plan and the technical report.
- Clicking on a room in the [floor plan](https://help.heatpunk.co.uk/books/plans-task/page/creating-a-floor-plan) will now bring up some new tabs: 
    - **Overview** which shows the room details, including annual demand of the room and a list of emitters in the room.
    - **Survey** where you can upload notes and photos of the room and emitters.
    - **Materials** where you can view the materials used in each room.
    - **Heat loss** where you can view a breakdown of fabric and ventilation heat loss calculations for each room.
- You can now toggle on measurements in the floor plan to view room dimensions.
- A new "unheated" room type is available to use.

## Fixes

- Fixed an issue where multiple dormers were not adding the same heat loss for each dormer over a room.
- Fixed dormers causing heat loss for rooms in which they are not a part of.
- Fixed ground floor u-values using the incorrect value in the CIBSE Domestic Heating Design Guide lookup table for most rooms.
- Fixed internal heat losses being factored into the displayed total external heat loss for projects with multiple floors.
- Changed the default heated adjoining temperature to 15°C and the default unheated adjoining temperature to 5°C, per updates to the National Annex . Previously they were 18°C and 10°C, respectively.
- Fixed a bug where the ventilation heat loss was unexpectedly changing when an external wall material was changed, caused by certain walls not being counted as exposed facades.

<span class="corp-icon material-symbols-rounded icon-readmore mceNonEditable" style="user-select: none;">​</span>[Why have my heat losses changed since the last time I opened the project?](https://help.heatpunk.co.uk/books/faqs/page/why-have-my-heat-losses-changed-since-the-last-time-i-opened-the-project)