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Overview
Brought to you by the Midsummer development team, Heatpunk represents our vision of accessible he...
Why does my total heat loss not equal the sum total of the room heat loss?
If you are using one of the BS EN 12831-1:2017 methods, the ventilation losses for a building are...
How do I factor in intermittent heating?
Heatpunk assumes continuous heating when determining the ODT and sizing the heat pump. If the pr...
How is the Outdoor Design Temperature (ODT) set?
The Outdoor Design Temperature (ODT) for your project will be automatically set using the 99th pe...
Why is the Outdoor Low Temperature (ODL) not changing after I've amended it?
Changing the Outdoor Design Temperature (ODT) does not affect the Outdoor Low Temperature (ODL) u...
How do I change the Outdoor Design Temperature (ODT) for my project?
To change the ODT, follow these steps: Note this will not affect the Outdoor Low Temperature (OD...
How are radiator outputs calculated?
Heatpunk calculates actual radiator outputs with the below formula. This allows us to easily cons...
Can I add in different brands of heat pump?
You can add in different heat pumps if you have a Heatpunk Pro license. For information on how to...
How do you select underfloor heating?
While on the plan task, from the Emitters sidebar, click the 🡥 icon and then select Add Underfloo...
New in May 2026
Updates Heatpunk UK has been updated to enact various MCS changes to operating temperature a...
Surveyed Plan and Design Options
When you first create a project, you will create a plan of the property as surveyed. This is call...
Emitters
Emitters are added to a project in the Plan task. Here you can model existing emitters and any ne...
Introduction to the Plans Task
In the Plans task, you create your initial floor plan - the surveyed plan - and then create desig...
Error: Couldn't get heat pump capacity: ODT out of range
This error will usually occur when you have set up a custom heat pump with some missing values. ...
Floor Plan Update - April 2026
We are excited to announce a major update to Heatpunk. This update changes the way you manage f...
Heatpunk Pro: help your team work more efficiently
Running a renewable heating business today means juggling a lot at once: fast‑moving leads, com...
2025 end of year recap
What a year for Heatpunk (and the industry) 2025 has been a year of change for Heatpunk and the ...
Partner spotlight: ESBE hydronic solutions
ESBE components have recently been added to Midsummer’s product portfolio and are now fully integ...
Ventilation Calculations in Heatpunk
This guide primarily applies to the UK version of Heatpunk. For the IE version, S.R.50-2021 (UK...
Sound Check (UK)
The information provided here does not apply to heatpunk.ie. The sound check is part of the plan...