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 pageWhat temperature range does it cover?
The coating can be applied across a service temperature range of −60 °C – +260 °C, on industrial pipework, roofs and facades alike.
How thick is the GWR NANO INSULATION® coating layer?
The dried coating is 1 mm thick. No primer coat or structural modification is required.
How many countries is it available in?
The product is currently available in 45 countries – across the European Union, the Middle East and Vietnam. Availability rests on a network of contracted distributors and applicators who also carry out the works on site, since the coating calls for airless spray equipment and a crew trained to use it. Procurement is further supported by the NATO Stock Number, which allows the product to be ordered through allied defence logistics channels.
What energy savings have been measured?
In comparative field testing under TÜV SÜD external monitoring (Dunabogdány, January–February 2021), the coated test house used 43% less heating energy than an uninsulated reference house and 9.5% less than a 10 cm EPS-insulated one; under summer cooling conditions, against the same reference house, the measured saving is 32%. The measurements were taken by the testing and calibration laboratory of MEOLIT Kft., on three identically built houses each held at 24 °C.
Can GWR NANO INSULATION® be applied to heritage buildings?
At 1 mm dry film thickness the coating does not alter the building’s visible appearance, ornamental elements or profiled surfaces – which is often an advantage. Conventional board insulation, several centimetres thick, would obscure arched window frames and cornice profiles entirely. Work on a listed building nonetheless requires heritage consent, obtained project by project. A documented reference installation exists on a heritage-protected building in Gödöllő, Hungary.
Is regular maintenance required after application?
The manufacturer specifies no regular maintenance. The coating forms a washable surface resistant to UV radiation, precipitation and temperature swings; at the 720-hour interim assessment of the 3,000-hour weathering programme no colour change was observed. It stays vapour-open – the measured Sd value is 0.40 m, class V2 (medium) to DIN EN ISO 7783 – so the wall goes on drying outwards and no moisture accumulates behind the coating. The surface is best checked as part of routine facade inspections.
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, in new-build and retrofit projects alike.
What warranty does it carry?
The contracting applicator gives every client the same 20-year warranty on the work carried out. It applies to every client on identical terms and its scope does not vary with the size of the project; its content is recorded in the works contract, which every client receives.
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.
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. The full exterior facade of a standard, low/medium-height family home can be coated within 3 working days by a 3-person crew.
What certifications does it hold?
The product is covered by a TÜV SÜD external monitoring report (no. 3229268) and holds 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 to the relevant MSZ EN standards, classified in ÉMI report O-34/2021; ASTM E84-23d testing (Efectis FTST24823 report) confirms Class A flame spread (FSI 20, SDI 10). The VOC content of the material is documented in ÉMI-TÜV SÜD test report R-804152, measured to ISO 16000-6:2004; the components detected total 14.4 mg/kg, orders of magnitude below the VOC content permitted in interior wall paints. Full test reports and certification documents are available on request.
Is it suitable for energy retrofit projects?
Yes. The coating is engineered for 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 consumption reduction measured in field testing. Because it requires no structural alteration, it can be used where conventional insulation systems are technically or economically unviable. The saving actually achieved depends on the building’s construction, orientation and condition, and is worth assessing case by case. Eligibility for any national or EU funding scheme should be verified against that programme’s own rules, in consultation with the 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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