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Specialist's guides
The specialist's guides
What we explain every week on WhatsApp, written down once and properly: sizing, consumption, error codes and smart use. No fluff — with the tables we use ourselves.
What size air conditioner do I need?
What size air conditioner you need: table by square metres, the factors that raise the calculation and the classic mistakes. Installer's guide with calculator.
Read the guide →How much does air conditioning cost to run? Real euro figures
What an air conditioner consumes per hour and per month in 2026: table by capacity, real costs at Spanish tariffs and the 6 habits that cut the bill.
Read the guide →Daikin error codes: what they mean and what to do
Daikin error codes explained: A3, E5, U0, U4 and more. What each means, what you can try yourself and when to call. The service technician's table.
Read the guide →Mitsubishi Electric error codes: what they mean and what to do
Mitsubishi Electric error codes: P8, E6, U8, LED blinks and remote codes. What they mean and when to call. The service table.
Read the guide →Fujitsu error codes: the blink table
Fujitsu error codes by Operation and Timer blinks: full table, how to count them and what each combination means. The service technician's guide.
Read the guide →What temperature should the air conditioning be set to?
What temperature to set the air conditioning: the recommended figure for summer and night, the cost of each degree and the 18 °C myths. Specialist guide.
Read the guide →Let's start
A short description, your municipality and — if you like — a few photos. We reply in writing, usually the same day.