{"product_id":"nakoair-os42-solar-air-heater-ventilator-2-in-1-lcd-thermostat-100m2","title":"Nakoair OS42 Solar Air Heater \u0026 Ventilator – 2-in-1 with LCD Thermostat – Up to 100m²","description":"\u003ch2\u003eMaximum Solar Heating Power – For Large Spaces Up to 100m²\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNakoair OS42\u003c\/strong\u003e is our largest and most powerful solar air heater. \nWith \u003cstrong\u003e135 m³\/h airflow\u003c\/strong\u003e and up to \u003cstrong\u003e25°C temperature boost\u003c\/strong\u003e, it's designed for large rooms, open-plan spaces, \nand commercial applications. The same 2-in-1 function as the OS22\/32, scaled up for maximum impact.\u003c\/p\u003e\n\n\u003ch3\u003e🌟 Why Choose the OS42?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Heating Power:\u003c\/strong\u003e 135 m³\/h airflow. Up to 25°C temperature boost. The most powerful model we make.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLarge Space Capacity:\u003c\/strong\u003e Heats up to 70–100m² effectively. Perfect for large homes and commercial spaces.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExceptional Energy Yield:\u003c\/strong\u003e \u003cstrong\u003e1,418 kWh\/year\u003c\/strong\u003e – the highest in the Nakoair range. Outstanding payback.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2-in-1 Function:\u003c\/strong\u003e Heats fresh outdoor air + circulates indoor air. Exclusive to OS22\/32\/42 series.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e72% Heating Efficiency:\u003c\/strong\u003e Advanced absorption board technology captures more solar energy.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLCD Smart Thermostat:\u003c\/strong\u003e 5 operating modes, real-time climate display, automatic energy switching.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e🔄 2-in-1 Function\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMode 1 – Fresh Air Heating:\u003c\/strong\u003e Morning and afternoon – heats fresh outdoor air and blows it indoors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMode 2 – Indoor Circulation (Exclusive):\u003c\/strong\u003e Noon time – circulates and reheats indoor air. The most effective way to raise room temperature. Can be extended at noon in spring and autumn for even more ventilation.\u003c\/p\u003e\n\n\u003ch3\u003e🔧 Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOS42\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2-in-1: fresh air heating + indoor air circulation\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eRecommended room size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e70–100 m²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax air flow\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e135 m³\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature rise\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 25°C above outdoor temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeating efficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e72%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eAnnual heating delivered\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 1,418 kWh\/year\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSun intensity performance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1,380W\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eThermostat\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLCD digital thermostat, 5 modes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSolar panel power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e28W\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFan\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSUNON 12V, 5.4W, double ball bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNoise level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e197 × 100 × 6 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e26 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eCarton size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e204 × 106 × 9 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGross weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e34 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEN12975, ISO9806, TÜV, Solar Keymark, CE\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 years (panel), 2 years (parts)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e🏠 Perfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLarge living rooms \u0026amp; open-plan homes (70–100m²)\u003c\/li\u003e\n  \u003cli\u003eCommercial spaces (shops, small offices, studios)\u003c\/li\u003e\n  \u003cli\u003eLarge workshops \u0026amp; garages\u003c\/li\u003e\n  \u003cli\u003eWarehouses \u0026amp; storage buildings\u003c\/li\u003e\n  \u003cli\u003eAnyone wanting maximum solar heating power\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e💰 Highest Energy Yield – Fastest Payback\u003c\/h3\u003e\n\u003cp\u003eThe OS42 delivers an exceptional \u003cstrong\u003e1,418 kWh\/year\u003c\/strong\u003e of free solar heating. \nFor large spaces that would otherwise cost hundreds of euros per year to heat, \nthe OS42 pays for itself in \u003cstrong\u003e2–3 years\u003c\/strong\u003e and delivers free heat for 15+ more years.\u003c\/p\u003e\n\n\u003ch3\u003e📦 What's In the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOS42 solar air heater main unit (large size: 197×100cm)\u003c\/li\u003e\n  \u003cli\u003eLCD digital thermostat\u003c\/li\u003e\n  \u003cli\u003e5–12V USB voltage boost cable\u003c\/li\u003e\n  \u003cli\u003e135mm hole saw\u003c\/li\u003e\n  \u003cli\u003eAir duct, automatic air outlets\u003c\/li\u003e\n  \u003cli\u003eActivated carbon filter\u003c\/li\u003e\n  \u003cli\u003eMounting accessories \u0026amp; manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e❓ FAQ\u003c\/h3\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cstrong\u003eIs the OS42 too big for a normal house?\u003c\/strong\u003e\u003c\/summary\u003e\n  \u003cp\u003eThe OS42 is designed for 70–100m². If your space is smaller, the OS32 (up to 60m²) or OS22 (up to 40m²) may be a better fit. However, if you have a large open-plan living area, the OS42 is the right choice.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cstrong\u003eCan I install two OS42 units?\u003c\/strong\u003e\u003c\/summary\u003e\n  \u003cp\u003eYes! For very large spaces or whole-home heating, many customers install multiple units facing different directions (e.g., southeast + southwest) to capture sunlight throughout the day.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cstrong\u003eDelivery – is the OS42 too heavy to handle?\u003c\/strong\u003e\u003c\/summary\u003e\n  \u003cp\u003eThe OS42 weighs 26kg (net) \/ 34kg (gross). It's manageable for two people. Free delivery to your door is included. If you have concerns about handling, please contact us – we can provide guidance or recommend a local installer.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch3\u003e✅ Certified \u0026amp; Trusted\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTÜV Rheinland\u003c\/strong\u003e – full certification including thermal performance, freeze resistance, mechanical load, and impact resistance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEN12975 \u0026amp; ISO9806 certified\u003c\/strong\u003e | \u003cstrong\u003eSolar Keymark\u003c\/strong\u003e | \u003cstrong\u003eCE marked\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe OS42 meets the highest European quality standards for solar thermal products.\u003c\/p\u003e\n\n\u003chr\u003e\n\u003cp\u003e\u003cem\u003ePrice includes VAT and customs duties. Free EU delivery to your door.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e🇩🇪 \u003cstrong\u003eGermany customers:\u003c\/strong\u003e OS42 qualifies for BAFA solar subsidy. Apply before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"OSCAR","offers":[{"title":"Default Title","offer_id":39323034976290,"sku":"OS42lcd","price":660.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0032\/7263\/8576\/files\/42_b8465b86-ebb4-4b1e-959e-2fbf85771f8a.jpg?v=1767167227","url":"https:\/\/nakoair.net\/products\/nakoair-os42-solar-air-heater-ventilator-2-in-1-lcd-thermostat-100m2","provider":"Nakoair solar air heater","version":"1.0","type":"link"}