Complete portable air conditioner guide: everything you need to know before buying
Are you considering installing a portable air conditioner in your home, office or caravan? Before making your decision, it's crucial to understand the different technologies, types and selection criteria. This encyclopaedic guide offers you a complete immersion into the world of portable air conditioning: from its history to current innovations, including the technologies that make the difference. At Tempéra, we believe that an informed buyer is a satisfied buyer. Discover how to choose the portable air conditioner that truly matches your needs and budget.
History and evolution of the portable air conditioner
The portable air conditioner is a relatively recent invention, born in the 1970s with the first portable cooling prototypes. Unlike fixed split systems, the portable air conditioner was designed to meet a growing need for flexibility: cooling spaces without property commitment or complex installation.
In the 1990s, with improvements in compressors and refrigerants, portable air conditioners gained in energy efficiency. The 2000s marked a turning point: the arrival of silent single-unit models and 3-in-1 systems (cooling, dehumidification, ventilation) democratised access to mobile air conditioning.
Today, portable air conditioners represent more than 25% of the residential air conditioning market in Europe. Recent innovations include portable split systems (with external unit), ultra-silent inverter compressors, and the integration of connected technologies for remote control.
This evolution responds to a changing climate context: summer heat waves are more frequent and intense, pushing consumers to seek quick and affordable solutions. The portable air conditioner embodies this pragmatic response.
The three main types of portable air conditioners
Classic single-unit air conditioners
The single-unit model remains the most common. All the mechanics (compressor, condenser, evaporator) are integrated into one unit. Hot air is expelled via a flexible hose to the outside. Advantages: instant installation, affordable price, total mobility. Disadvantage: slightly less efficient than a split, because hot air escapes through the same hose as cold air.
Portable split air conditioners
These systems separate the indoor unit (evaporator) from the outdoor unit (condenser), connected by tubes. Result: better energy efficiency (up to 30% savings), less noise, faster cooling. The 1500W portable split air conditioner – Camping & indoor embodies this category, ideal for permanent or semi-permanent spaces.
3-in-1 and multifunctional air conditioners
These units combine cooling, dehumidification and ventilation in one appliance. Perfect for humid regions or transitional seasons. The 12000 BTU portable air conditioner 3-in-1 represents this maximum flexibility: one machine for all your climate needs.
Key technologies and performance criteria
Power in BTU: the heart of your choice
Power is measured in BTU/h (British Thermal Unit). A 12000 BTU air conditioner cools a room of 30-40 m² under normal conditions. The simple rule: count approximately 300-400 BTU per m². For a small office (15 m²), 9000 BTU is sufficient; for a large living room (50 m²), aim for 18000 BTU or more.
Energy efficiency (EER and SEER)
The EER (Energy Efficiency Ratio) index measures cooling efficiency. An EER above 3 is good; above 4, excellent. Modern air conditioners display SEER (Seasonal Energy Efficiency Ratio) ratings of 5 to 7, guaranteeing notable electricity savings.
Inverter technology
This innovation adjusts compressor speed continuously, rather than turning it on and off. Result: energy consumption reduced by 30% and increased silence. Premium models like the 12000 BTU portable air conditioner – Hot & Cold incorporate this technology.
Noise level
Portable air conditioners emit between 50 and 75 dB. For optimal comfort, favour models under 65 dB, particularly if you work or sleep nearby.
Eco-friendly refrigerants
R32 and R290 are gradually replacing R410A. They offer better energy efficiency and reduced environmental impact.
Comparison of Tempéra's three solutions
Are you hesitating between our three flagship ranges? This comparison will help you decide based on your situation.
The 1500W portable split air conditioner – Camping & indoor is your best ally if you're seeking autonomy: motorhome, caravan, mobile office. Moderate power (1500W), ultra-competitive price (£599), split installation for superior efficiency.
The 12000 BTU portable air conditioner 3-in-1 offers versatility: three functions in one machine, compact design, excellent for small to medium spaces (20-35 m²). At £999, it's the optimal value for money for standard residential use.
The 12000 BTU portable air conditioner – Hot & Cold is the premium option: maximum power, integrated heating function (year-round use), inverter technology, absolute silence. At £1149, it's the investment for those wanting premium and durability.
Installation, maintenance and optimisation
Installation: 5 minutes flat
Unlike fixed splits, a portable air conditioner requires no drilling or technical intervention. Unbox, place, plug in, insert the exhaust hose through a window or door: you're done. No permits, no authorisation needed.
Optimal positioning
Place your air conditioner in the centre of the room, away from walls and obstacles. Avoid direct sunlight and heat-generating appliances (oven, radiator). Intelligent positioning reduces cooling time by 20%.
Regular maintenance
Clean filters every 2-4 weeks: a clogged filter reduces efficiency by 40%. Empty the condensation water tank (or connect a continuous drainage hose). Annually check joint sealing and condenser cleanliness.
Electricity consumption
A 12000 BTU air conditioner consumes approximately 1000-1200W continuously. Over 8 hours daily for 3 summer months, expect around £100-150 in additional electricity costs. Inverter models reduce this bill by 25-30%.
Money-saving tip
Close doors and windows, use blinds or shutters to block the sun, set the temperature to 24-26°C rather than 20°C. These simple steps halve your consumption.
Choose according to your situation: decision guide
Are you renting your home? → Single-unit or portable split air conditioner. No marks, no issues with your landlord. The 1500W split is perfect.
Do you have a small space (less than 20 m²)? → 3-in-1 air conditioner. Minimal footprint, guaranteed versatility.
Are you looking for premium (40-50 m², intensive use)? → 12000 BTU hot/cold air conditioner with inverter. One-off investment, durability 10+ years.
Are you camping or nomadic? → 1500W portable split. Lightweight, autonomous, efficient on battery (certain models).
Do you have a tight budget? → 3-in-1 air conditioner at £999. Best value for money on the market.
Do you live in a humid region? → Favour models with active dehumidification (3-in-1 or higher).
Do you work from home? → Split or inverter air conditioner for silence (< 65 dB). Productivity guaranteed.
FAQ
What is the difference between a split air conditioner and a single-unit air conditioner?
A split air conditioner separates the indoor unit (evaporator) from the outdoor unit (condenser), offering better energy efficiency (30% savings) and less noise. The single-unit integrates everything into one unit, simpler to install but slightly less efficient. For intensive use, prefer the split; for maximum mobility, the single-unit.
How do I calculate the BTU power needed for my room?
Multiply the surface area in m² by 300-400 BTU. For 30 m², you'll need 9000-12000 BTU. Adjust for sun exposure (+20%), insulation (+15%), and number of occupants (+10% per additional person). An oversized air conditioner consumes unnecessarily; an undersized one cools slowly.
Does a portable air conditioner consume a lot of electricity?
A 12000 BTU air conditioner consumes approximately 1000-1200W continuously, around £8-10 per day with intensive use. Over 3 summer months (8h/day), expect £100-150. Inverter models reduce this bill by 25-30%. It's cheaper than you might think, especially compared to the comfort it provides.
Can you install a portable air conditioner without an exhaust hose?
No, technically impossible. A portable air conditioner produces hot air that must be expelled outside via a flexible hose. Without exhaust, the room will heat up and the unit will overheat. You must always leave a window/door slightly open or drill a small hole for the hose.
What is the best portable air conditioner for a small flat?
The 3-in-1 12000 BTU portable air conditioner is ideal: compact, three functions in one, discreet design, and very competitive price (£999). If you're renting, it's perfect as no fixed installation is needed. For less than 20 m², the 1500W split is sufficient and costs less.
Can a portable air conditioner heat in winter?
Only 'hot/cold' or 'reversible' models heat. They function as an air-to-air heat pump. Tempéra's 12000 BTU hot/cold portable air conditioner offers this versatility: air conditioning in summer, heating in winter. Classic single-unit models do not heat.
What is the noise level of a portable air conditioner?
Portable air conditioners emit between 50 and 75 dB. For reference, 60 dB is normal conversation, 70 dB is a vacuum cleaner. If you work or sleep nearby, favour inverter models (62-65 dB max). Avoid basic models above 70 dB.
How long does a portable air conditioner last?
With regular maintenance (filter cleaning, condensation drainage), a portable air conditioner lasts 8-12 years. Premium models with inverter and high-quality compressor often exceed 12 years. Neglected maintenance reduces lifespan to 5-7 years.
Can I use a portable air conditioner in camping or a caravan?
Yes, absolutely. The 1500W camping portable split air conditioner is specially designed for this: moderate power, reduced footprint, quick installation. Some models run on battery or 12V power. Check your motorhome's electrical compatibility before purchasing.
What is the difference between dehumidification and cooling?
Cooling lowers the temperature and reduces humidity as a bonus. Dehumidification removes moisture without cooling (or very little). In humid climates (coastal, rainy regions), dehumidification alone is often sufficient. 3-in-1 models offer both, ideal for coastal regions.