2-in-1 Function

Thermal performance testing for solar air collector; Pressure drop test; Time constant test; Visual inspection; Internal pressuretest; Rupture or collapse test; Stagnation temperature; Exposure test; Externalthermal shock; Internal thermal shock; Rain penetration; Freeze resistance; Mechanical load; Impact resistance test using steel ball; Final inspection. All above listed tests of the standard EN12975-1:2006+A1:2010 and ISO 9806:2017 were passed successfully in accordance with the criteria.

Z Collecteur d'air OS22 Réchauffeur solaire：Aérotherme chauffage climatiseur Climatisation Déshumidificateur Pompe à Ventilation Déshumidification Oscar

The Solar Keymark is a voluntary third-party certification mark for solar thermal products, demonstrating to end-users that a product conforms to the relevant European standards and fulfills additional requirements. It is widely spread across the European market and beyond. The Solar Keymark is a quality label.

Standard Function

Air collector OS20LCD Solar air Heater heating air Conditioner Conditioning Exhaust Fan Ventilator Thermal Panel Dehumidifier Heat Pump Ventilation Dehumidification OSCAR

Nakoair OS20LCD Solar Air Heater with LCD Thermostat – Digital Temperature Control – Up to 30m²

€349.00 €370.00

26 In Stock

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Smart Solar Heating with LCD Thermostat – Set It & Forget It

The Nakoair OS20LCD combines the proven OS20 heating performance with a smart curved LCD touchscreen thermostat. See real-time temperature and humidity. Choose from 5 operating modes. Automatic solar-to-electric switching. The most convenient way to heat rooms up to 30m² with free solar energy.

🌟 Why Choose the OS20LCD?

  • LCD Smart Thermostat: Curved touchscreen displays indoor/outdoor temperature & humidity. Precision comfort control.
  • 5 Operating Modes: Auto, humidity control, manual, heating, and ventilation – adapt to any weather.
  • Auto Energy Switching: Uses solar power when sunny; automatically switches to electricity on cloudy days (less than 10 kWh/year).
  • Automatic Air Vents: Two air outlets open/close automatically. 8mm thermal insulation cotton inside. No heat loss when off.
  • Activated Carbon Filter: Dust filtration, odor removal, insect prevention, noise reduction.
  • Easy DIY Install: Same simple installation as OS20. 1-hour setup. All tools included.

🎛️ 5 Smart Operating Modes

Auto Mode Automatically selects heating or ventilation based on temperature & sunlight
Humidity Control Mode Maintains 40–70% RH by comparing indoor/outdoor moisture levels
Manual Mode You decide when it runs – full control anytime
Heating Mode Prioritizes heating – maximizes temperature boost
Ventilation Mode Focuses on air exchange – ideal for stuffy rooms

🔧 Technical Specifications

Model OS20LCD
Recommended room size Up to 30 m²
Max air flow 88 m³/h
Temperature rise Approx. 10°C above outdoor temperature
Annual heating delivered Approx. 525 kWh/year
Thermostat LCD digital touchscreen, 5 modes
Auto solar/electric switch Yes (less than 10 kWh/year on electric)
Air vent Automatic open/close, thermal insulation
Filter Activated carbon (dust, odor, insect)
Certification EN12975, ISO9806, TÜV, Solar Keymark, CE
Warranty 10 years (panel), 2 years (parts)

🏠 Perfect For

  • Living rooms & bedrooms (up to 30m²)
  • Holiday homes that need automatic climate control
  • People who want precision temperature control
  • Homes where someone is frequently present (recommended to choose LCD version for occupied rooms)

💡 How the Auto Switch Works

On sunny days, the collector heats your room all day. At noon (spring/autumn/winter), it automatically ventilates with fresh outdoor air. On cloudy or rainy days, it seamlessly switches to electricity to keep providing fresh air (consumption: less than 10 kWh/year – minimal cost).

📦 What's In the Box

  • OS20LCD solar air heater main unit
  • LCD digital thermostat (curved touchscreen)
  • 5–12V USB voltage boost cable
  • 135mm hole saw
  • Air duct, air outlets (×2, automatic)
  • Activated carbon filter
  • Mounting accessories & manual

❓ FAQ

What's the difference between OS20 and OS20LCD?

OS20 has a mechanical thermostat (simple, reliable). OS20LCD adds a digital LCD screen with 5 smart modes, auto solar/electric switching, and real-time temperature/humidity display. Choose OS20LCD if the room is frequently occupied.

Does the LCD thermostat use a lot of electricity?

No. The thermostat is ultra-low power. Even on cloudy days when the fan uses electric power, total consumption is less than 10 kWh/year – less than €5/year in most European countries.

✅ Certified & Trusted

TÜV Rheinland | EN12975 & ISO9806 | Solar Keymark | CE marked

Price includes VAT and customs duties. Free EU delivery to your door.

Nakoair solar air heater plant

About Nakoair

Oscar Science & Technology Co., Ltd. is a professional manufacturer of solar air collectors / heaters and solar ventilators. Nakoair® solar air heaters with LCD thermostat provide a healthy, warm home and automatically manage indoor air — simple to operate, thoughtful air-management experts.

Certifications & testing

Our products are certified and tested to international standards, including ISO 9001:2015, TÜV NORD, European Solar Keymark (EN ISO 9806) and TÜV Rheinland test reports. Every unit is built to EN12975 and TÜV standards.

Quality first

With in-house development and testing labs, we rigorously test air volume, temperature difference, insulation, UV-resistance, climate-resistance and water-proofing across materials. That is how Nakoair® delivers consistently better quality.

Sustainable innovation

By adopting high-tech materials such as low-iron ultra-pure glass and special nano-insulation coatings, we are committed to sustainable development and continuous innovation.

Worldwide

Nakoair® solar air heaters are sold in many countries — the UK, Denmark, Germany, Czechia, Australia, New Zealand, Canada, the USA and more. Year after year, Nakoair® grows in popularity thanks to its high performance and competitive price.

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