Short, practical answers to the questions customers ask before buying – no marketing, with numbers you can check.
Guides
MMC Klima
20
Buying guide
Floor area, BTU, inverter, energy class, noise, Wi-Fi and installation – a practical guide to picking the right air conditioner for a home or office.
6 min read
Sizing
BTU per square metre table for air conditioners: which rooms 9000, 12000, 18000 and 24000 BTU suit, and when to size up.
4 min read
Heating
Air-to-air (air conditioner) versus air-to-water heat pump for heating a home – differences, running costs, when each one wins and how to decide.
5 min read
Installation
Installation prices by capacity: from €178 for a wall unit up to 24000 BTU, multi-split priced per unit, what standard installation includes and when extras apply.
4 min read
Technology
What makes an inverter air conditioner different from a conventional (on/off) one, how much electricity it saves, when it is worth it and when not.
3 min read
Prices
Real 2026 prices for an air conditioner with installation: the unit by capacity and class, the fixed installation tariff (178–255 €), delivery and what adds to the bill.
5 min read
Sizing
9000 BTU for 20 m², 12000 BTU for 30 m², 18000 BTU for 40 m². When the rule does not apply and how to correct for exposure, glazing and ceiling height.
4 min read
Running cost
How to estimate the running cost of an air conditioner in summer and winter from SEER and SCOP, with worked examples for 9000 and 12000 BTU and an A+ vs A+++ comparison.
5 min read
Heating
Heating with an inverter air conditioner at −15°C and −25°C: what to check (SCOP, output at −7°C, hyper inverter), when it beats electric, pellets and gas, and how to use it right.
5 min read
Brand comparison
The three most requested Japanese brands in Bulgaria compared: series, strengths, noise, winter performance, prices and who each one is for.
6 min read
Bedroom
What 19, 22 and 26 dB mean, which Daikin, Mitsubishi Electric, Toshiba and Fujitsu series stay under 20 dB, and how installation affects noise.
4 min read
Energy label
What A+, A++ and A+++ mean on an air conditioner, which SEER and SCOP values sit behind each class, why there are two classes on one label and when the higher class pays off.
4 min read
Multi-split
One outdoor unit for 2–5 rooms: pros, cons, unit and installation cost compared with separate air conditioners, and when separate units are the better choice.
4 min read
Advice
The most common mistakes: wrong capacity, saving on installation, no vacuuming, a bad location, ignoring SCOP, "A+++" for cooling only, and more.
5 min read
Planning
The best moment to buy: spring and autumn. Why prices, stock and installation lead times are best off-season, and how to plan.
3 min read
Maintenance
How to clean the unit yourself (filters, housing), what the annual professional service includes, how often it is needed and what smells, dripping and weak airflow mean.
4 min read
Troubleshooting
Warm, weak or stopping: wrong mode, dirty filters, ice on the pipes, a frozen outdoor unit, error codes. What you can check yourself and when to call a technician.
4 min read
Smart home
What a Wi-Fi air conditioner can do: start from your phone, schedules, geofencing, voice assistants, consumption tracking. Which brands build the module in and whether it is worth it.
3 min read
House
Cooling and heating a house: separate units, multi-split, ducted or an air-to-water heat pump. How to size an 80–120 m² floor and what each solution costs.
5 min read
Technology
R32 vs R410A in air conditioners: efficiency, global warming potential, safety, recharge cost and what changed with the EU F-gas regulation.
3 min read