These tools are built and maintained by one person – a working Building Services and Renewables tutor – not a support team. That means I read every message myself, but replies will not be instant. Please bear with me.
If a calculation looks wrong, a tool misbehaves, or you have an idea to improve things, I want to hear about it.
Email me using the button below. Your app build version is added to the email automatically. To help me act on it quickly, please add the device and browser you are using, and what happened.
Email support