Overheating, step by step
Work down this list. Each step is cheaper than the one after it.
- Cut the glazing areaEspecially on east and west. Glass area is the largest single lever.
- Shade it outsideExternal shading sized to the sun angles on that facade.
- Let heat out at nightSecure openable ventilation, with exposed mass to purge.
- Reduce internal gainsLighting, equipment, and above all uninsulated hot water pipes.
- Only then cool itMechanical cooling is the last resort, not the first fix.
Educational reference. Overheating is assessed against published criteria such as CIBSE TM52 and TM59, using modelling.
Questions about the Overheating poster
- What’s on the Overheating poster?
- 5 numbered steps. Work down this list. Each step is cheaper than the one after it. Cut the glazing area — Especially on east and west. Glass area is the largest single…; Shade it outside — External shading sized to the sun angles on that facade.; Let heat out at night — Secure openable ventilation, with exposed mass to purge.; Reduce internal gains — Lighting, equipment, and above all uninsulated hot water pipes.; Only then cool it — Mechanical cooling is the last resort, not the first fix.. Educational reference. Overheating is assessed against published criteria such as CIBSE TM52 and TM59, using modelling.
- Who is the Overheating poster for?
- Overheating belongs to the Architecture section rather than to a school year, because design is not something one grade owns. Anyone learning environmental design can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Overheating poster?
- Use it on any highly glazed or highly insulated scheme, and on any south or west flat. A wall chart earns its place by being glanceable from where the work is happening, so Overheating belongs on the wall where that design work actually happens, within glancing distance, rather than filed away.
- What other posters go with Overheating?
- Thermal Mass, Passive Solar and Airtightness sit alongside Overheating in the Architecture section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Thermal MassPassive SolarAirtightness
- Is the Overheating poster free to download and print?
- Yes. Overheating downloads as a free PDF with no account, no email and no watermark, like everything else in the Architecture section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Overheating poster print at?
- Overheating is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Overheating loses nothing.Printing guide
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