Product - Frequently Asked Questions
It is the insulating glass unit (IGU) from Pilkington designed specifically to easily achieve a Window Energy Rating of at least C in most window systems. The IGU is available from Pilkington and other IGU processor companies who sign up to an agreement to make and supply according to the specified design. The unit has a back pane of Pilkington K Glass™, a front pane of Pilkington Optiwhite™ providing enhanced free energy from the sun and either Argon gas fill or Air fill with warm edge spacer bar for improved thermal insulation to easily achieve WER Band C compliance with schemes such as the BFRC Rating and the Certass TRR IGU Fabricator scheme. Window companies are invited to incorporate Pilkington energikare™ in windows, join the installer scheme and benefit from the marketing support to homeowners being carried out by Pilkington.
Yes. Building Regulations compatibility on the basis of Window Energy Rating (WER) band C is achieved in most glazing systems. If you are aiming to comply with Building Regulations via the Uw compliance route, as with all glazing systems, you will need to confirm compliance using a proprietary Uw Calculator
Yes. EN1279-3 for gas-filling is one requirement for processor eligibility under Pilkington energiKare™ branding however customers may prefer to qualify by using air filling with warm edge spacer bar and demonstrating manufacture to EN1279-2 instead. In both cases, once used in conjunction with an appropriate frame the total window must meet at least band C of a Window Energy Rating scheme such as Certass TRR or BFRC.
A4. Can customers utilise softcoat products in place of Pilkington K Glass™ in Pilkington energikare™ units?
Yes, it is now possible to incorporate Pilkington K Glass™ S, our own branded soft coat product within Pilkington energiKare™ units to meet the terms of the scheme. Use of this product will enable windows to easily achieve WER band B or A depending on the frame.
No. Although the baseline IGU will normally achieve at least a C rating, some other related IGUs will be eligible under the brand so long as they contain Pilkington Optiwhite™ AND Argon AND any product from our Pilkington K Glass™ range AND you meet EN 1279-3. Use of a warm edge spacer bar to further enhance window performance (either to get to a C in poorer thermally performing frames, or to exceed a C generally) is acceptable. With the use of higher performing Pilkington K Glass™ OW or Pilkington K Glass™ S in your IGU it is possible to achieve up to A ratings in most glazing systems.
Exclusions include :
- ANY softcoat low E except for Pilkington K Glass™ S
- Non-Pilkington glass in either pane.
No this is not appropriate. Tinted glass greatly reduces the energy performance of a window in a dwelling.
Patterned glass is excluded from consideration under Window Energy Rating schemes. Hence its treatment within WERs falls inline with measures such as Georgian bars or leaded windows. Patterned glass IGUs as part of a Pilkington energiKare™ should be Argon filled (to match the window U-value specification of the remainder of the installation) and labelled as Pilkington energiKare™.
It will be possible in the future. In the meantime we do not expect there to be much overlap between the requirements but if they are requested then we will allow Pilkington Activ™ to be substituted for Pilkington Optiwhite™ in the front pane but warm edge spacer must then be used to ensure that the finished IGU will meet C rating in typical frames.
As per normal IGUs, no change.
A range of glazing options incorporating Pilkington K Glass™ and Pilkington Optiwhite™ designed to meet the various requirements for energy efficient glazing in all types of homes. It consists of;
- Pilkington energiKare™ ; either in its basic or enhanced forms to help achieve a minimum WER band C or up to band A in most frame types depending on the type of Pilkington K Glass™ used in combination with argon gas filling and warm edge spacer options.
- Pilkington energiKare™ Triple: to achieve the ultimate in energy efficiency maximising thermal insulation and solar gain for the next generation of new homes
- Pilkington Spacia™ (which was formerly known as Pilkington energiKare™ Legacy: incorporating slimline vacuum double glazing from NSG, Japan which can be used to improve the thermal efficiency of traditional homes where previously only single glazing was allowed.
It is unique in that it is slimline vacuum double glazing, a double glazed IGU 6.4mm thick which has the same thermal performance of a standard 28mm IGU. Pilkington Spacia™ has been installed in Japan by our parent company NSG for more the 10 years. Due to its slim profile it can be used as replacement glazing in traditional timber framed windows where previously only single glazing could be used. For more information click here.
These were the names we used to use for the standard and enhanced versions of Pilkington energiKare™. With improvements in our coated glass range and the needs of the market we now define all IGUs containing any type of Pilkington K Glass™ back pane and a Pilkington Optiwhite™ front pane as part of the range.
In improved version of the well known and widely used Pilkington K Glass™ low emissivity coated glass. It has the tried and tested Pilkington K hard coating on Pilkington Optiwhite™ Glass. The use of Pilkington Optiwhite™ gives improved solar gain and higher light transmission which give it the benefit of a brighter appearance than the original product. For more details click here.