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.

🇩🇪 Germany customers: OS20LCD qualifies for BAFA solar subsidy. Apply online before purchase.

OASES solar air heater plant  OASES solar air heater plant

Oscar Science & Technology Co., Ltd. is a professional manufacturer of solar air collector/ heater, solar ventilator etc. Nakoair® Solar with LCD thermostat, provide you with a healthy and warm home and automatically processes indoor air. Simple operation, thoughtful air management expert! 

Owning Patent and certificates as ISO9001:2015, German TUV NORD CERT; European Solar Keymark certification(ISO9806); TÜV Rheinland test reports etc.

With a developing and testing labs, tests are strictly applied as air volume, temperature difference of different models in different conditions, also insulation, UV-resistance, climate-resistance, water-proof to various materials such as coating and silicone. Thus Nakoair® is supplying products in better quality.

Innovatively adopting high-tech material like low iron ultra-pure glass and Special texture nano insulation coating etc, the company dedicates to sustainable development and innovations.

Nakoair® solar air heaters are sold to many countries like UK, Denmark, Germany, Czech, Australia, New Zealand, Canada, America etc. In the past years, with continuous improvement and innovation, Nakoair® solar air heater is popular due to its high performance and competitive price.

Oscar Science & Technology Co., Ltd.

Address: Albert-Schweitzer-Str.1 Tor 20 55459 Grolsheim Germany

Email: info@nakoair.net

Distributors and installers are welcome! Your address, email, and phone number will be published. You will be  promoted to a wider customer base through Google Ads and other means. Local customers will buy from you or hire you for installations：

Recruiting-partners

Shipping policy

Usually goods will be shipped within 5 working days after receiving all payments. Free shipping in the European Union, Canada, United States, United Kingdom and Japan. For other countries, please consult the customer service mailbox: info@nakoair.net.

Refund and return policy

We have a 15-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
You can always contact us for any return question at info@nakoair.net.

Damages and issues

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exchanges

The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

Refunds

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

The buyer is responsible for paying the return shipping fee ( Except for quality problems or logistics damage).

Return address:
Frankfurt warehouse, Germany
Recipient (Consignee)
4PX DEGRS 75Z52CX
Address
Albert-Schweitzer-Str 1
City
Grolsheim
State/Prov. (State/Prov.)
Rheinland-Pfalz
Country
Germany
Zip Code (ZipCode)
55459
Telephone (Tel)
0151-66342177

 

London warehouse
Recipient (Consignee)
4PX UKGRS 75Z52CX
Address
Leicester Commercial Park Unit 1, Dorsey Way
City
Enderby
State/Prov. (State/Prov.)
Leicester
Country
United Kingdom
Zip Code (ZipCode)
LE19 4DB
Telephone (Tel)
01582-477267

 

Paris warehouse, France
Recipient (Consignee)
4PX FRGRS 75Z52CX
Address
8 rue de la Patelle, Bat-3, Porte-310
City
Saint-Ouen-l'Aumône
State/Prov. (State/Prov.)
Val-d'Oise
Country
France
Zip Code (ZipCode)
95310
Telephone (Tel)
0767620833

 

Madrid warehouse, Spain
Recipient (Consignee)
4PX ESGRS 75Z52CX
Address
C/ Rayo, Modulo 2 Parc. 2.4 Pol. Ind. La Quinta
City
Cabanillas del Campo
State/Prov. (State/Prov.)
Guadalajara
Country
Spain
Zip Code (ZipCode)
19171
Telephone (Tel)
916997679

 

Los Angeles warehouse
Recipient (Consignee)
4PX USGRS 75Z52CX
Address
5610 Grace Pl
City
Commerce
State/Prov. (State/Prov.)
California
Country
United States of America
Zip Code (ZipCode)
90022
Telephone (Tel)
3235970311
New York warehouse
Recipient (Consignee)
4PX USGRS 75Z52CX
Address
1000 High St
City
Perth Amboy
State/Prov. (State/Prov.)
New Jersey
Country
United States of America
Zip Code (ZipCode)
08861
Telephone (Tel)
7184542809

 

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