Swelter

Keeping British homes liveable in the heat

Tools

Work out the number first

This site is not a blog with a shop attached. The tools come first and the writing hangs off them. Everything here runs in your browser and nothing you type is sent anywhere.

  1. Room cooling calculator

    How much heat a room actually gains, where it comes from, and whether a machine is the answer at all.

  2. Running cost calculator

    What a cooling unit costs to run, per hour, per night and per summer, in pounds.

  3. Can I install air conditioning here?

    Whether a unit is permitted development in England under Class G, including the cooling only trap that most sites miss.

  4. Live weather warnings

    Every Met Office severe weather warning in force across the UK right now, heat and cold alike, in their own words.

  5. The unit database

    Every unit on published specification alone. No scores, no star ratings, nothing tested.