Bedroom air conditioning built for British summers — 19 dB night mode, held at 20°C all night, fitted in a day with no mess. Same unit heats you in winter too.
Quieter than rustling leaves. You literally cannot hear it once you're in bed.
The optimum temperature for deep sleep, held all night with no fan noise or open windows.
Cool the room without letting in traffic, pollen or 4am sunrise.
Takes the chill off the room in seconds — cheaper than an electric heater, no fire risk.