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Home Planning tools Windows & films Controls & comfort Measure & compare Draughts & shading Devices & standby Quotes & planning Before choosing window film, describe the window Three window ratings that answer different questions Measure a window schedule without guessing film quantities Window film and external shading solve different parts of the brief Start a thermostat shortlist with the existing system Write a useful heating and cooling schedule brief A room temperature log is an observation, not an energy audit Watts and kilowatt-hours: keep the time in the calculation Compare annual energy labels before comparing running costs Choose an energy monitor around the question it can answer Keep a useful before-and-after energy diary A draught is not the same as required ventilation Ask what a shade will do in more than one season Build a reversible energy-improvement brief for a rental A smart plug needs a specific, compatible job Make a standby inventory without switching off essentials Ask what happens when a connected control goes offline Read an energy-product quote beyond the product price Turn a savings claim into questions you can check Build a transparent annual electricity cost scenario