Want to control your air conditioner from your phone? Turn it on before you get home, adjust temperature with your voice, save energy with smart schedules? You don't need to buy a new AC — an IR blaster or smart controller converts any air conditioner to “smart” for less than €30. In this guide, we'll look at the best solutions, how they work, and what energy savings to expect.
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How Smart AC Control Works
Most air conditioners are controlled via an infrared (IR) remote. A smart IR blaster copies these signals and sends them via WiFi/app. That means:
- It learns the IR codes of your AC (auto-detect or manual learning)
- Sends commands via WiFi → IR signal → AC responds as if you pressed a button on the remote
- Control from app, voice assistants, automations
Alternatively, if your AC already has a WiFi module (newer Daikin, Mitsubishi, LG, Samsung models), you can use the official app or cloud integration without an IR blaster.
Top 5 Smart AC Controllers
| Device | Connection | Sensors | Voice | Price | Rating |
|---|---|---|---|---|---|
| Sensibo Sky | WiFi → IR | Temp, Humidity | Alexa, Google, Siri | ~€90 | ⭐ 9/10 |
| tado° Smart AC V3+ | WiFi → IR | Temp, Humidity, Window | Alexa, Google, Siri | ~€100 | ⭐ 9/10 |
| SwitchBot Hub Mini | WiFi → IR | Temp (external) | Alexa, Google | ~€25 | ⭐ 8/10 |
| Broadlink RM4 Mini | WiFi → IR | Temp | Alexa, Google | ~€18 | ⭐ 7.5/10 |
| Sensibo Air | WiFi → IR | Temp, Humidity, Motion | Alexa, Google, Siri | ~€120 | ⭐ 9.5/10 |
Detailed Reviews
Sensibo Sky — Top Choice
The most popular smart AC controller in the world. 2-minute setup: scan your AC brand, connect WiFi, done. Excellent app: weekly schedule, climate react (automatic adjustment based on temperature), geofencing, air quality alerts. Works with 10,000+ AC models. HomeKit support. Sensibo Sky is worth the €90 — energy savings cover the cost in 2-3 months.
tado° Smart AC Control V3+
Premium choice from a German company. Excellent design, precise sensors, open window detection (stops AC if it detects an open window). Multi-room support with multiple units. Integration with Home Assistant, HomeKit, Alexa, Google. Downside: some features (geofencing, skills) require subscription (€30/year) — without it, basic functionality is free.
SwitchBot Hub Mini — Budget King
€25 for an IR blaster that controls AC, TV, fan, anything with an IR remote. No built-in sensors but you can add SwitchBot Meter (€15). Decent app, automations via scenes, Alexa/Google compatible. For anyone who wants basic smart AC control without major expense.
Broadlink RM4 Mini — Ultra Budget
€18 — the cheapest solution. Learns IR codes, sends via app or voice. App (Broadlink) less polished, but works. Excellent integration with Home Assistant. If you don't care about premium app experience, it does exactly the job.
Step-by-Step Installation
Step 1: Placement
The IR blaster needs line of sight to the AC — place it on the wall below or next to the indoor unit. Adhesive base (included). Don't place it behind furniture — IR signal doesn't pass through walls.
Step 2: WiFi Connection
Download the app (Sensibo, tado, SwitchBot), create an account, follow the steps. Connect only to 2.4GHz WiFi (IR blasters don't support 5GHz). Connects to network in 30 seconds.
Step 3: AC Pairing
Select your AC brand + model from the list. If not found, use “Learning mode” — point the original remote at the IR blaster, press each button, and it learns the signals. The entire process takes 2-5 minutes.
Step 4: Automations
Set up: a) schedule (AC ON 7:00am, OFF 11:00pm), b) geofencing (AC ON 30min before you arrive home), c) climate react (if temperature > 27°C → AC ON 25°C), d) night mode (increase 1°C after midnight).
Energy Savings
How much you save: A typical air conditioner costs €40-80/month during summer. Smart AC control saves 20-40% through:
- Geofencing: AC doesn't run in an empty house
- Schedules: precise operating hours
- Climate react: instead of running non-stop, it reacts to actual temperature
- Night mode: gradual temperature increase at night (saves without discomfort)
If you save €15/month for 4 summer months = €60 savings/year. Sensibo Sky (€90) pays for itself in 1.5 summers. Broadlink (€18) pays for itself in the first month.
WiFi AC vs IR Blaster
| Feature | IR Blaster | WiFi Module AC |
|---|---|---|
| Cost | €18-120 | Built-in or €50-100 module |
| Compatibility | Any AC with IR remote | Specific brands only |
| Accuracy | 95% (occasional miss) | 100% (direct) |
| Setup | Plug & play | Brand app required |
| Integration | Multi-platform | Brand-specific |
Conclusion
If you want smart AC without replacing your air conditioner, an IR blaster is the solution. Sensibo Sky or tado° for premium experience, SwitchBot/Broadlink for budget. Energy savings alone pay for the device — convenience (voice control, geofencing, remote access) is a bonus. In a climate like Greece's, with 4+ months of AC usage, smart AC control is one of the smartest investments for your home.