I stayed in a yurt one night in Mongolia in the middle of winter six years ago. It was toasty and warm inside and at least -25 outside. A yurt has a stove burning in the centre and you'll have pretty thick and heavy blankets.
We know what an appartment is in England but we tend to call them flats which DL doesn't accept - is this word never used in the USA? I wonder if it accepts condo - which we never use int he UK unless describing our American relatives' dwellings, homes or abodes.