Air conditioner energy class: what the letters mean
How to read the European label, and why it has two separate ratings for cooling and heating
#air conditioner
11 articles
What is BTU on an air conditioner
The unit that measures cooling power, and how to use it to pick the right size
What is R32 gas in air conditioners
Today's most common refrigerant, and why it replaced R410A
What is SEER and SCOP on an air conditioner
The indexes that measure seasonal energy efficiency, in cooling and heating
What is an air conditioner without an outdoor unit
The monobloc that packs everything into one indoor unit, for those who can't install a traditional system
Difference between Inverter and on/off air conditioners
Why nearly every model sold today is Inverter, and what actually changes
Difference between single-split and dual/multi-split air conditioners
One outdoor unit for one room, or for two, three, four: when each setup makes sense
Best fixed air conditioners: the ranking (August 2026)
From affordable Korean brands to Japanese flagships: the most recommended splits for every budget
Daikin vs Mitsubishi vs LG vs Hisense: which single-split should you choose (August 2026)
Efficiency, noise, and features compared across four of the most popular brands in the 9,000-12,000 BTU range
How to choose an air conditioner: buying guide (2026)
BTU, single-split or multi-split, with or without an outdoor unit: everything you need to know before buying
How to calculate the right BTU for your air conditioner based on room size
The practical formula to avoid getting the capacity wrong, with real room-by-room examples