Rough rule: 9,000 BTU for a room up to about 20 m² (from €329), 12,000 BTU up to about 30 m² (from €349), 18,000 BTU up to about 45 m² (from €549) and 24,000 BTU up to about 60 m² (from €669). Go one size up for a top floor, big windows or a sunny west wall.
Can an air conditioner heat my home in winter?
Yes: an inverter air conditioner is a heat pump, so it heats as well as cools. It moves heat in from outside, which takes much less electricity than an electric heater makes the same warmth. Class A+++ models start at €429 in Cyprus today.
How much does installation cost?
It varies with the pipe run, the wall, the floor and where the outdoor unit goes, so shops usually quote installation separately from the unit. Some listings are sold with fitting and some without: check the listing, and ask for a written quote that names pipes, brackets and electrical work.
Wall split or portable air conditioner?
A wall split is quieter and cheaper to run, and a 12,000 BTU one starts at €349 here. A portable one starts at €399: it needs no fitting and moves between rooms, but its hose goes out of a window and it is louder and less efficient.