
Room & running costs
Choose the room question before the appliance
Separate air movement, active cooling and additional heat before comparing a fan, portable air conditioner or electric heater.
Read the guideKeep room measurements and electricity assumptions visible.

Separate air movement, active cooling and additional heat before comparing a fan, portable air conditioner or electric heater.
Read the guide
Record readings, time and context without turning a selected target or an isolated observation into a performance claim.
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Hold time and tariff constant, change one power input and keep the result separate from a product-performance ranking.
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Separate the appliance, compatible equipment, delivery and optional items before comparing a total with your own budget.
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