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Guide
What Is TM59? The Two Overheating Tests, Explained
TM59 is the methodology Approved Document O points to for dynamic overheating assessment. It has two tests, and most developments fail the second one. Here is what each measures and what a failure is telling you.
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Part O: Simplified Method or Dynamic Modelling?
Approved Document O gives you two routes to compliance. Picking the wrong one costs money twice. Here is how to decide early, and the dwelling types where the simple route almost never works.
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TM52 vs TM59: Which One Do You Need?
They sound interchangeable and they are not. One is for homes, one is for everything else, and only one has a night-time bedroom test. A short answer and the reasoning behind it.
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