V-KOOL® is the world's only clear, spectrally-selective applied film which transmits more than 70% of daylight while rejecting 99% of ultra-violet and 94% of infra-red heat. Spectrally-selective films have transparent, metallised coatings designed to transmit, reflect or absorb different wavelengths of the solar spectrum. In the case of V-KOOL®, it is designed specifically to be light transmitting while heat reflective. V-KOOL® is the solution to architectural and automotive businesses in terms of comfort improvement and energy saving.
Southwall Technologies Inc. is a NASDAQ-listed company which invested US$18 million in perfecting the sputtering technology to produce V-KOOL®. The solar control window film were originally developed for the US Space and Military Program. Same technology has been used to deposit the radar evasive surface on Stealth Bomber. The technology is now being popularized for commercial use in order to improve the human comfort, heat control for window glass for both building and automobile.Read more .....
V-KOOL® is manufactured through multi-layered sputtering. These materials are deposited one layer at a time onto a super clear polyester substrate (only the top 1% of all polyester that are produced daily in the world can meet the specifications) at a rate of 2m/min per layer.
V-KOOL® retains its transparency in spite of the metal and adhesive coatings and does not interfere with visibility when applied to the windows. The coating blocks off infra-red heat and ultra-violet radiation without significantly reducing the visible light transmittance. The glass is made shatter resistant by the film forming a permanent bond.
Winhop Projects (HK) Limited is a pioneer on energy conservation scheme. We specialize in V-KOOL® solar control window film can be easily retrofitted on glass to reflect the unwanted Infra-red heat radiation and damaging Ultra-violet without proportionally reducing daylight transmittance. Solar Heat Gain through glazing system by radiation can be minimized, and as a result, your electricity bill on cooling loads and artificial lighting can be reduced. The OTTV value of the building envelope can be reduced substantially by at least 30% after applying V-KOOL® films.
Our scope of services includes design consultancy, energy saving audit, OTTV upgrading audit, supply and retrofit assembling and other customized services. Our products include: VK75, VK70, VK40, J-Series, A-Series, H-Series, T-Series, K-Series, G-Series, External, Safety and Security Solar Control Window Film. V-KOOL® products apply to both architectural use and automotive use. Our services cover both Hong Kong and Macau. Product Q & A ..... Heat blocking test..... Heat absorption test..... Mobile signal test.....
Commercial and residential buildings in the tropics use 50 to 70 percent of their energy consumption for comfort cooling. A sizeable portion of the cooling demand is often due to heat gain through glazed areas (windows, skylights and atria).
In many countries, Demand Side Management is being implemented to ensure that buildings incorporate energy efficient green technologies like window films.
V-KOOL’s® window films solve all window overheating problems. Depending on a window’s exposure to solar energy and requirements for transparency, V-KOOL® films can maximize heat rejection or visible light transmission. Even maximum heat rejection and high light transmission are available from V-KOOL® in a clear, colourless and non-reflective film.
When applied to the windows of your car, V-KOOL® forms a virtually transparent, protective barrier against the sun's heat. V-KOOL® films work by reflecting heat rather than absorbing heat. Heat absorbing films will cause intensive heat build-up in the car due to re-radiated heat and thermal stress onto the glass can result in glass breakage or cracks.
V-KOOL® coating helps to lower temperatures quickly at start up, allowing the passenger cabin to cool faster. You cruise in comfort, subjecting your air conditioner to less strain and improving fuel efficiency.
V-KOOL® 70 provides a superior mix of high visible light transmission at 70%, as well as high reflection of infra-red at 94% and high rejection of ultra-violet at 99%. Already a well received solution for many architects and car owners around, V-KOOL® 70 epitomises the qualities of a true spectrally-selective coating. Architectural projects commonly employing V-KOOL® 70’s glass enhancing qualities range from retail outlets, penthouses, atria, to air control towers. V-KOOL® 70 is the clear choice when it comes to projects with high visibility and heat rejection requirements.
|Visible Light Transmission||73.2%|
Leading our range of spectrally-selective coatings in visible light transmittance is V-KOOL® 75. While looking deceptively clear, V-KOOL® 75 is a full-fledge, spectrally-selective coating with good solar heat rejection properties. The performance behind V-KOOL® 75 lies in its complex multi-layer thin coatings of metallic substances, such as silver. Although the total heat rejection is not high as V-KOOL® 70, the key advantage of V-KOOL® 75 is its high visible light transmission 77% which is higher than the requirement of Transport Department for Front Screen. Typical application for V-KOOL® 75 range from automobile, retail shopfronts, restaurants, art galleries to residential glass with very high visible light transmission requirements.
|Visible Light Transmission||77%|
Industry-leading technological expertise has allowed the scientists who created V-KOOL® to configure visible light transmission and infra-red rejection attributes of the coating to suit different market needs. An impressive example can be seen in V-KOOL® 40. While V-KOOL® 75 and 70 were engineered for applications where visible light transmission requirement is high, V-KOOL® 40 is darker in appearance to V-KOOL® 75 and 70. For applications requiring lesser visibility and maximum solar control, V-KOOL® 40 fits the bill by offering a staggering 98.3% rejection of infra-red radiation from the sun. Again, spectral-selectivity means that while V-KOOL® 40 almost completely eliminates infra-red radiation from penetrating your windows, it still allows 40% of visible light to pass through.
|Visible Light Transmission||42.8%|
In forced entry scenarios, glass applied with V-KOOL® Secure enables a measure of resistance to penetration allowing for a period of time long enough to allow other security measures to sense and respond to the attack; successfully thwarting "smash and grab" burglaries and reducing the probability of a quiet and successful break-in. Typical applications of V-KOOL® Secure are retail shopfronts, skylights, galleries, museums, banks, military installations and other high-risk facilities or structures. V-KOOL® secure complies with ANSI-Z97-1 Unlimited (Section 5.1) when applied to nominal 5/32", 1/8" and 1/4" annealed glass.
|Visible Light Transmission||66.3%|
|Visible Light Reflectance||8.9%|
|Total Solar Transmission||32.4|
|Total Solar Reflectance||25.2|
|Total Solar Absorption||42.4|
|Total Solar Energy Rejection||57%|
|U-Value (W/M2 0C)||5.68|
Goldust was created to offer customers a choice of having a moderately spectrally-selective film at a cost-effective price. While it's heat rejection performance is not as impressive as a full-fledge spectrally-selective film like V-KOOL®, Goldust still offers an edge over conventional film in it's ability to reject more infra-red and ultra-violet radiation for a similar amount of visible light transmission. Coupled with a light gold sheen, Golduse has an added aesthetic dimension that offers heat control with a visible touch of class. Goldust is usually applied on residential and commercial buildings, with a requirement for solar control as well as moderate visibility. In some countries, Goldust can be applied to vehicles such as to the rear side windows ad rear windshields.
|Visible Light Transmission||64.4%|
|Visible Light Reflectance||14.2%|
|Total Solar Transmission||45.9|
|Total Solar Reflectance||21.7|
|Total Solar Absorption||32.4|
|Total Solar Energy Rejection||46.24%|
|U-Value (W/M2 0C)||5.52|
V-KOOL® Conventional L-Series Safety & Security Film is a unique product where increasing production of float glass each year, it is evident that glass continues to be an integral part of contemporary architecture. As glass usage in buildings increase, and due to the inherent vulnerability of glass as material, the need for a solution toward accidental and deliberate threats to safety and security becomes more pressing. Typical applications of V-KOOL® Conventional L-Series Safety & Security Film are retail shopfronts, skylights, galleries, museums, banks, military, transportation installations and other high-risk facilities or structures. V-KOOL® Conventional L-Series Safety & Security Film complies with ANSI Z97-1 Unlimited (Section 5.1) when applied to nominal annealed or tempered glass.
|Visible Light Transmission||85.0%||81.0%|
|Visible Light Reflectance||13.0%||12.0%|
|Total Solar Transmission||78%||76%|
|Total Solar Reflectance||4%||11%|
|Total Solar Absorption||18%||13%|
|Total Solar Energy Rejection||17.0%||20.0%|
This range of films is made from robust Titanium and provides a value for money solution for varying levels of solar heat control requirements. As a metalised film, atoms of Titanium are deposited onto the film creating an effective solar heat reflective surface. The T-Series comes in a family of varying densities of Titanium. Customers can choose between lightly coated Titanium films to denser, more reflective layers depending on their individual needs. Due to their reflective nature, T-Series films are usually applied onto architectural glass.
|Visible Light Transmission||49.0%||33.0%||23.0%|
|Visible Light Reflectance||15.0%||21.0%||30.0%|
|Total Solar Transmission||42%||28%||19%|
|Total Solar Reflectance||12.0%||18.0%||25.0%|
|Total Solar Absorption||46.0%||54.0%||57.0%|
|Total Solar Energy Rejection||44.0%||57.0%||64.0%|
|U-Value (W/M2 0C)||6.42||6.48||6.36|
The K-Series window films are 100% metalised films. They are cost-effective, heat effective film but engineered to have a muted non-reflective appearance. Using proprietary technology, this series of films allows customers a range of different levels of glare and heat control, characterized by its low levels of visible reflectivity. A film with this low visible-reflectively is suited for use in buildings looking for adequate glare control as well as buildings with requirements for solar control of a metalised window film without the visible reflectivity. The K-series is especially suited for vehicle applications to achieve privacy without the reflectivity.
|Visible Light Transmission||14.0%||28.0%||37.0%||52.0%|
|Visible Light Reflectance||17.0%||11.0%||9.0%||8.0%|
|Total Solar Transmission||17.0%||31.0%||37.0%||50.0%|
|Total Solar Reflectance||13.0%||8.0%||8.0%||6.0%|
|Total Solar Absorption||70.0%||61.0%||55.0%||44.0%|
|Total Solar Energy Rejection||63.0%||52.0%||47.0%||38.0%|
|U-Value (W/M2 0C)||6.59||6.59||6.53||6.43|