How to Choose an Air Conditioner: Size, Inverter, and Installation

Air conditioner capacity is measured in BTU or kilowatts. A room around 20 m² typically needs 9,000–12,000 BTU; larger living rooms of 30–35 m² often require 18,000 BTU or more. Ceiling height, sun exposure, and number of occupants all push the requirement upward — when in doubt, size slightly up rather than down.

Undersized units run constantly and wear out faster; oversized ones cycle too quickly and leave humidity in the air. Use manufacturer room-size charts as a starting point, then adjust for Balkan summers where south-facing apartments can gain significant heat.

Inverter air conditioners vary compressor speed to maintain temperature smoothly. They use less electricity over a season and are quieter at night — important for bedrooms. Non-inverter (on/off) models cost less upfront but spike power draw each time the compressor starts.

For daily use over three to five months, inverter models usually pay back the price difference through lower bills. Energy labels (A++ and above) help compare running cost, but always check the actual kWh figure for your climate zone.

Split systems need professional mounting, vacuuming, and refrigerant charge. Ask whether the quoted price includes standard pipe length (often 3–4 metres), wall bracket, and drainage. Extra metres of copper piping or difficult façade access can add €50–150 to the job.

Check warranty terms: some brands require installation by authorised service to validate coverage. In Serbia, Bulgaria, and Albania, authorised networks differ — confirm local service before you buy a grey-import unit online.

The same model — for example a Daikin, Mitsubishi, or Gree inverter 12 — can differ by €80–200 between stores once delivery and install bundles are counted. commo.cc lists current prices from multiple Balkan retailers so you see the full picture in one place.

Filter by delivery city, sort by total price, and read each shop's install policy. A slightly higher ticket with included mounting often beats a cheap unit plus a separate technician call. Take five minutes to compare; it routinely saves more than a lunch out.