We assess whether the control's connector may cause discomfort when lying on the blanket, ease of using controls, ease of fitting the blanket to the bed, how easy it is to clean and whether they can be washed and dried in a dryer.
We measure how long it takes the blanket to pre-heat to its maximum temperature. The shorter the time, the better the score.
We also collect the general data, measure energy use, check for correct labelling, and take thermal images to see how well the blankets distribute heat.
We then run the blankets through our electric blanket rig which simulates 2000 turns of the blanket and examine them for breakages in the wiring. They are also moistened and 3000 volts passed through them to test for moisture resistance.
Calculated based on a 92-day period for winter. We include the manufacturer recommended pre-heat period, then set the blanket to its lowest setting for eight hours. We still recommend heating the blanket before bed and turning it off. If a blanket's running cost seems very low, this is likely because they aren't recommended for all-night use.
The temperature recorded is that of the blankets heating element. The temperature of the material, say, on the corner of the blanket, could be lower. We don't recommend sleeping with the blanket on all night.
Calculated based on a 92-day period for winter. We include the manufacturer recommended pre-heat period, then set the blanket to its lowest setting for eight hours. We calculate the energy result by 30c/kWh.
Goldair blankets aren't recommended for night use, so running cost is calculated on the recommended maximum usage scenario, which is why these are significantly lower than other blankets on test.
Timer settings let you decide in advance how long the blanket will be on for. The Breville BZB437WHT has two Timer modes: its manual mode can be set at any time between one and nine hours, while its automatic mode stores your favourite time setting.