This is the 4904th most frequent Russian word.
кв
"Кв" in Russian is an abbreviation that can represent "квартира" (apartment) or other terms depending on context.
In this sentence, "кв." is an abbreviation of the word "квартира" (apartment) and is used to denote an apartment number.
Я живу в кв. 25.
I live in apt. 25.
Here, "кв." is an abbreviation for "киловатт" (kilowatt), a unit of power measurement.
Энергопотребление в кв. часах очень высокое.
Energy consumption in kilowatt-hours is very high.
In this context, "кв." is an abbreviation for "квадратный" (square), often used in mathematical or scientific expressions.