# Emitters Emitters are added to a project in the [Plan task](https://help.heatpunk.co.uk/books/plans-task/page/introduction-to-the-plans-task "Introduction to the Plan Task"). Here you can model existing emitters and any necessary upgrades. Add **existing emitters** to the ***surveyed plan*** and adjust the flow temperature on the right-hand sidebar to clearly see where upgrades are needed. On a **[design option](https://help.heatpunk.co.uk/books/plans-task/page/surveyed-plan-and-design-options "Plans and Design Options")** you can then model these **emitter upgrades**. Below is a short video demonstrating how to add and upgrade radiators and underfloor heating. ### ### Emitters tab As you build your floor plan, you can access a range of controls and details in the *Emitters* tab: [![Emitter tab.png](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/scaled-1680-/vnh6qFwxQQmbxgIY-emitter-tab.png)](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/vnh6qFwxQQmbxgIY-emitter-tab.png) - View heat loss information per floor and navigate between floors - **Emitter output**: total floor emitter output / total floor heat loss - **Sufficient rooms**: no. of rooms where heat loss is met / no. of rooms where heat loss is not met - Hover over the 🛈 icon next to *Emitters* to view the **total emitter output** and **annual demand** for the property - For new or existing emitters, click **⋯ three dots** to edit details or delete. On removed emitters click the **⋯ three dots** > **Restore emitter** to add it back to the design option - Each room displays whether the heat loss is met and the **room emitter output / room heat loss** - Click **🡥** to **see** **room details** to add other emitters or view the room annual demand, element heat loss, volume and area. - Click the **exclamation icon to override the heat loss** for that room

Edits to existing emitters from the *Emitters* tab apply to all plans. Read about [emitter upgrades](https://help.heatpunk.co.uk/books/plans-task/page/emitters#bkmrk-radiator-upgrades) below.

While on the *Emitters* tab, as you adjust the **flow temperature**, you can see directly on the floor plan whether the heat loss is being met: [![AdjustFlowTempFloorPlanView.gif](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/3jW0dGBH6qDRBEJl-adjustflowtempfloorplanview.gif)](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/3jW0dGBH6qDRBEJl-adjustflowtempfloorplanview.gif)

UFH and other non-radiator emitters have a **fixed output** that does not change with flow temperature in Heatpunk. As seen above, the living room output remains the same.

### Adding emitters You can add emitters in both the *surveyed plan* and design options. Emitters added to the *surveyed plan* will be added to all design options, while emitters added within a design option are only added to that option. #### Adding radiators To place radiators on a floor plan, drag and drop from the right-hand sidebar. [![PlacingRadiator.gif](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/tFs7e8EjbJKxhdfs-placingradiator.gif)](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/tFs7e8EjbJKxhdfs-placingradiator.gif) Click on the radiator to edit the type and size or remove from the plan. If the type you are looking for isn't listed, click *Add Material* to add radiators to your [material library](https://help.heatpunk.co.uk/books/plans-task/page/managing-your-material-palettes-and-library "Managing Your Material Palettes and Library"). [![image.png](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/scaled-1680-/ZiBw0kjDjoau5Qo6-image.png)](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/ZiBw0kjDjoau5Qo6-image.png) #### Adding underfloor heating or other emitters To add underfloor heating, navigate to the **Emitters tab** and click **🡥 See room details on the room. Below the room details, then click *Add underfloor heating* or *Add other emitters*. Fill in the details and then save changes. [![UFH.gif](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/gwZHuN2Ql6YDZKvC-ufh-ezgif-com-video-to-gif-converter.gif)](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/gwZHuN2Ql6YDZKvC-ufh-ezgif-com-video-to-gif-converter.gif) ### Emitter upgrades To complete emitter upgrades, make sure you have a **design option** selected. When you add, upgrade, or remove emitters, this is clearly labelled for each room: [![image.png](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/scaled-1680-/x8RnO4sw2BpHixLn-image.png)](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/x8RnO4sw2BpHixLn-image.png) - **Existing**: emitters added to the *surveyed plan* - **Removed**: existing emitters deleted or replaced on a design option - **New**: emitters added to a design option

If a radiator you've added is of the wrong type, remove the radiator, navigate to the correct floor plan (surveyed plan or a design option) and re-add the radiator.

#### Radiator upgrades Click on the radiator on the plan and then click upgrade. [![image.png](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/scaled-1680-/cGC8FGKc49UT8xm7-image.png)](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/cGC8FGKc49UT8xm7-image.png) You can then edit the details of the existing emitter. [![image.png](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/scaled-1680-/rg0oHHdZs9rcXXEH-image.png)](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/rg0oHHdZs9rcXXEH-image.png) Clicking *Save changes* will delete the existing radiator from the floor plan and replace it with the new radiator. [![image.png](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/scaled-1680-/GX9qjHq8HG5v44C6-image.png)](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/GX9qjHq8HG5v44C6-image.png) #### Underfloor heating and other emitters upgrades If you are replacing the radiator with underfloor heating (or another emitter), **delete** the radiator from the plan and follow the steps [above](https://help.heatpunk.co.uk/books/plans-task/page/emitters#bkmrk-adding-underfloor-he) to add UFH/other emitters to a project. ### Overriding heat loss To override the heat loss on a room, click the **exclamation** icon. Input the reason for the override and save. That text will then display in the technical report. [![image.png](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/scaled-1680-/FCxdcsSMauBIV997-image.png)](https://help.heatpunk.co.uk/uploads/images/gallery/2026-04/FCxdcsSMauBIV997-image.png) The text will also appear on the floor plan. To view the full text, click **🡥 See room details**. --- If you have further questions, please get in touch at or .