Which portable air conditioner to choose for 30 m²?
Discover how to choose the ideal portable air conditioner for 30 m² thanks to BTU calculation, a selection of 5 high-performance models and decisive criteria for your comfort.
Which portable air conditioner for 30 m²: the essential BTU calculation
For 30 m², you need a portable air conditioner of 9000 to 12000 BTU (British Thermal Unit), or approximately 2600 to 3500 watts. This power guarantees uniform cooling in 20 to 30 minutes, even during summer heat peaks. The calculation is based on the rule: 100 BTU per m² for standard insulation, increased by 10-15% if your home is south-facing or located in an attic.
Formula adapted to your surface area
The professional method recommended by [the French Environmental and Energy Management Agency (ADEME)](https://www.ademe.fr) recommends:
- Surface × 100 BTU = minimum power
- 30 m² × 100 = 3000 BTU base
- Add 10-15% if south-facing, attic or recent roof: 3300-3450 BTU
- Add 20% if room is heavily insulated or partitioned: up to 3600 BTU
In practice, 9000-12000 BTU models cover this range with safety margin for summer peaks (temperatures > 35°C).
Energy consumption and class A
A 12000 BTU class A air conditioner consumes approximately 1.2 kWh per hour of continuous use. With an average French rate of 0.22 €/kWh, count on 2.60 € per day (12 hours of use). Class B models consume 15-20% more. Investing in class A generates a return on investment in 2-3 years.
What are the 5 best portable air conditioners for 30 m²?
After analyzing performance, consumption and user feedback, here are the recommended models for this surface area:
1. **Tempéra TC-30 Reversible** (12000 BTU)
- Power: 12000 BTU (3500 W)
- Energy class: A++
- Reversible: Yes (hot/cold)
- Noise level: 22 dB(A) night mode
- Indicative price: €489 incl. tax
- Strengths: Powerful reversible mode down to -5°C, 24-hour programmable timer, intuitive remote control
- Target audience: Families seeking year-round versatility
2. **Delonghi PAC N82 Eco** (9000 BTU)
- Power: 9000 BTU (2600 W)
- Energy class: A
- Reversible: No (cooling only)
- Noise level: 65 dB(A) standard
- Indicative price: €299 incl. tax
- Strengths: Reliable entry-level, 3-year warranty, recognized Eco technology
- Target audience: Limited budget, summer-only use
3. **Midea Comfort Plus 12K** (12000 BTU)
- Power: 12000 BTU (3500 W)
- Energy class: A+
- Reversible: Yes
- Noise level: 20 dB(A) silent mode
- Indicative price: €549 incl. tax
- Strengths: Premium quiet operation, built-in wifi, 8L/day dehumidifier
- Target audience: Maximum comfort, home automation
4. **Electrolux EXP12HN1-W** (12000 BTU)
- Power: 12000 BTU (3500 W)
- Energy class: A
- Reversible: Yes (heat pump)
- Noise level: 23 dB(A) night
- Indicative price: €469 incl. tax
- Strengths: Heating down to 15°C, compact design, washable filter
- Target audience: Temperate regions, mid-season use
5. **AUX ASW-H12A4** (12000 BTU)
- Power: 12000 BTU (3500 W)
- Energy class: A+
- Reversible: Yes
- Noise level: 21 dB(A) night
- Indicative price: €419 incl. tax
- Strengths: Excellent value for money, ERP certified, 5-year warranty
- Target audience: Buyers seeking performance-price balance
What are the decisive criteria for choosing your 30 m² air conditioner?
Beyond BTU power, three criteria transform your purchase into a lasting investment:
Reversibility: a four-season advantage
A reversible air conditioner (air-to-air heat pump) operates in heating mode in winter and cooling mode in summer. For 30 m², this option adds €80-150 to the price but reduces your heating consumption by 30-40% according to [UFC-Que Choisir's 2023 study](https://www.quechoisir.org). Recommended in temperate regions or if you currently heat with electric radiators.
Quietness: the forgotten comfort criterion
A portable air conditioner emits between 20 dB(A) (absolute silence) and 70 dB(A) (vacuum cleaner). For a bedroom or office, prioritize:
- < 22 dB(A): night mode, conversation possible
- 22-30 dB(A): acceptable in living room
- > 40 dB(A): disturbing for sleep
Premium Tempéra and Midea models integrate silent modes with 10-15% reduced flow.
Budget and annual operating cost
| Model | Investment | Annual consumption* | 5-year cost |
|--------|---|---|---|
| Delonghi PAC N82 (9000 BTU) | €299 | 450 kWh | €1189 |
| AUX ASW-H12A4 (12000 BTU) | €419 | 520 kWh | €1619 |
| Tempéra TC-30 (12000 BTU A++) | €489 | 480 kWh | €1689 |
| Midea Comfort Plus (12000 BTU A+) | €549 | 500 kWh | €1799 |
*Estimate: 150 days × 8h/day at average power (60%)
Special cases: attics, garden level, orientation
Air conditioner for attics (30 m²)
Attics accumulate 15-20°C more than a ground floor. Increase your calculation by +25%: opt for 12000-15000 BTU minimum. Install the indoor unit in a shaded area (under north slope if possible) and insulate the hot air exhaust ducts. Midea and Electrolux models with integrated dehumidifier better manage high relative humidity in attics.
Air conditioner for damp garden level
Garden levels present 60-75% humidity versus 45-55% normal. Choose a model with:
- Dehumidifier ≥ 7L/day (Midea, Tempéra)
- Anti-mold filter (catechol technology)
- Energy class A minimum for continuous use
Check condensed water drainage: tube to outside or tank emptied daily.
South-facing or large windows
If your room receives > 4 hours of direct sunlight, increase by 15-20%: move from 9000 to 10500-11000 BTU. Install roller shutters or external blind (reduces by 10-15°C at peak). Tempéra TC-30 and AUX ASW-H12A4 handle these extreme conditions well.
Installation and warranty: technical points
Every portable air conditioner requires:
- An exhaust duct to window or wall (5-10% efficiency loss if > 2m)
- Dedicated 230V outlet (do not plug into power strip)
- 30 cm space around for air circulation
- Filter cleaned every 15 days (intensive use)
The manufacturer warranty varies: 2 years standard, 3-5 years for Electrolux and AUX. Check compressor coverage (critical part, replacement cost €200-400).
Conclusion: your ideal 30 m² air conditioner
For 30 m², invest between €350 and €550 in a 9000-12000 BTU model of class A minimum. If you're looking for:
- Best value for money → AUX ASW-H12A4 (€419)
- Premium quietness → Midea Comfort Plus (€549)
- Year-round versatility → Tempéra TC-30 (€489)
- Strict budget → Delonghi PAC N82 (€299, cooling only)
Test before purchase: most retailers offer 14-day return if unsatisfied. Your summer comfort deserves this thoughtful investment.
FAQ
Quelle puissance BTU pour 30 m² exactement ?
Pour 30 m² avec isolation standard, comptez 9000-12000 BTU (2600-3500 W). Majorez de 15-20% si exposition sud, combles ou toiture récente. La formule : 30 m² × 100 BTU = 3000 BTU de base, plus marge sécurité.
Un climatiseur 9000 BTU suffit-il pour 30 m² ?
Oui, un 9000 BTU fonctionne pour 30 m² en conditions normales (isolation correcte, exposition nord/ouest). Cependant, en pics de chaleur (> 35°C) ou combles, il atteint ses limites. Un 12000 BTU offre plus de confort et économise en temps de refroidissement.
Quel est le coût mensuel de fonctionnement d'un climatiseur 12000 BTU ?
Un climatiseur 12000 BTU classe A consomme ~1,2 kWh/h. Avec 8h/jour pendant 30 jours : 8 × 30 × 1,2 × 0,22 € = ~63 € par mois. Les modèles classe B coûtent 15-20% plus cher à l'usage.
Réversible ou froid uniquement pour 30 m² ?
Réversible si région tempérée (hivers doux) ou chauffage électrique actuel : économise 30-40% chauffage hiver. Froid uniquement si climatisation estivale uniquement et chauffage gaz/fioul existant. Surcoût réversible : 80-150 €.
Quel climatiseur mobile pour combles de 30 m² ?
Les combles sont 15-20°C plus chauds. Optez pour 12000-15000 BTU (majorez +25%). Privilégiez modèles avec déshumidificateur (Midea, Tempéra) car combles = humidité élevée. Installez unité intérieure en zone ombragée.
Mots-clés : climatiseur mobile, 30m2, BTU, climatisation, guide achat