Frequently asked questions
Questions and answers.
Answers to the most common questions about GWR NANO INSULATION® thermal insulation and Wind Driver VAWT wind turbine.
Thermal Insulation
GWR NANO INSULATION®
View product pageHow thick is the GWR NANO INSULATION® coating layer?
The dried coating is 1 mm thick. No primer coat or structural modification is required for application.
What temperature range does it cover?
The coating operates across a service temperature range of −60 °C ... +260 °C.
How many countries is it available in?
The product is currently available in 45 countries — across the European Union, the Middle East, and Vietnam, supported by NATO Stock Number-based procurement.
Is it vapour-permeable?
Yes. The coating maintains substrate vapour diffusion capacity (Sd equivalent air layer thickness 0.40 m, V2 medium class per DIN EN ISO 7783), preventing condensation and moisture accumulation.
What surfaces can it be applied to?
The coating bonds without a primer to metal, concrete, brick, wood, plastic, glass and plasterboard — this broad substrate compatibility is what makes it viable across complex building assemblies using mixed materials, spanning new-build and retrofit projects alike.
What annual energy savings does it achieve?
TÜV SÜD EN ISO/IEC 17025 accredited laboratory testing confirms 43% annual energy saving versus an uninsulated reference building, 32% summer cooling saving and 9.5% winter saving versus a 10 cm EPS-insulated reference building.
Where has it been applied at scale?
Among documented large-scale applications, 113,800 m² were applied across Lusail National Stadium and Al-Thumama Stadium for the FIFA World Cup Qatar 2022, where the 1 mm coating replaced a 15–30 cm conventional insulation layer. A Vietnam field test recorded 43.02% average cooling energy savings and a peak single-day saving of 53.56%. Reference projects on residential buildings, panel blocks and heritage-protected properties in Hungary are also documented.
What warranty does it carry?
The contracting applicator - the party performing the specific application works - provides a 20-year applicator workmanship warranty. This warranty is contractual, engagement-specific, and governed by the applicable national construction law of the project jurisdiction.
Can GWR NANO INSULATION® be applied to heritage buildings?
Yes. Because the coating is only 1 mm dry film thickness, it does not alter the building's visible appearance, ornamental elements or profiled surfaces — making it suitable where heritage regulations prohibit visual changes to the facade. Conventional board insulation, several centimetres thick, would obscure arched window frames and cornice profiles entirely. A documented reference installation exists on a heritage-protected building in Gödöllő, Hungary.
Can it be applied without scaffolding?
Typically yes, on low and medium-height buildings. Airless spray technology enables application without scaffolding or specialist access equipment on surfaces that are safely reachable from ground level or by ladder. Taller buildings or hard-to-reach facade sections may require scaffolding or an aerial work platform for safe access. A standard, low/medium-height family home can be fully coated inside and out within 3 working days by a 3-person crew.
What certifications does it hold?
The product holds a TÜV SÜD test certificate (EN ISO/IEC 17025 accreditation) and a NATO Stock Number (8030-51-000-9542), and is certified to ISO 9001:2015 quality management and ISO 14001:2015 environmental management. Its fire classification is D-s2, d0 - based on MSZ EN 13501-1:2019, MSZ EN ISO 11925-2:2020, MSZ EN 13823:2020 and BS EN 13238, certified under ÉMI O-34/2021 - and ASTM E84-23d testing (Efectis FTST24823 report) confirms Class A flame spread (FSI 20, SDI 10). Health safety is certified under ÉMI-TÜV SÜD R-804152. The NATO Stock Number also supports procurement through allied defence logistics, and full test reports and certification documents are available on request.
Is it suitable for energy retrofit projects?
Yes. The coating is specifically engineered to address the technological and economic constraints of retrofitting the existing building stock - applied without demolition or long construction downtime, typically without scaffolding on low and medium-height buildings, with a TÜV SÜD-verified energy efficiency improvement. Because it requires no structural alteration, it can be used in renovation projects where conventional insulation systems are technically or economically unviable. Eligibility and terms for any available national or EU renovation funding scheme should always be verified against that specific programme's own call for proposals, in consultation with the applying contractor.
Wind Turbine
Wind Driver VAWT
View product pageCan the Wind Driver VAWT be combined with solar PV panels?
Yes. The Wind Driver VAWT integrates with a photovoltaic system, supporting on-grid and off-grid configurations - the two generation profiles are temporally complementary.
How loud is it in operation?
The measured sound pressure level is below 10 dB - well under every European urban noise standard reference threshold. Suitable for rooftop, industrial, public-space and residential installations.
What output range and model variants are available?
Four models are available: WD-M1 (1 kW rated, 1.1 kW max), WD-M3 (3 kW rated, 3.5 kW max), WD-M5 (5 kW rated, 6 kW max) and WD-M10 (10 kW rated, 12 kW max). The direct-drive permanent magnet generator reaches 96% efficiency, 20-year design life.
What certifications does it hold?
CE marking, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018 (occupational health and safety), ISO 50001:2018 (energy management), and ISO 10002:2018 (customer satisfaction) - accredited third-party conformity assessment covering the full manufacturing process.
What is its cut-in wind speed?
The cut-in speed is 1.2 m/s (4.3 km/h), compared with the 3–5 m/s threshold of conventional horizontal-axis wind turbines. This enables generation in low-wind urban and rooftop environments, with the helical blade geometry harvesting wind energy independently of direction.
How much maintenance does the Wind Driver VAWT require?
Minimal. The turbine has no gearbox and no external braking system, and its low, 80–100 rpm rated rotational speed reduces mechanical fatigue of components — maintenance requirements are a fraction of those for conventional turbines.
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