Energy Ratings Scheme

Join The Register Today

The easy way to prove the energy performance of your windows and doors.

Simple Window Energy Ratings stickers, featuring your brand to help consumers trust that your products are the best choice for their home.

Join the Energy Ratings Scheme

Energy Ratings Scheme

Our Energy Ratings Scheme has been designed to help you prove the performance of the products you supply.

Our Window Energy Rating (WER) labels are designed to be consumer friendly. They avoid all technical jargon and we use simple-to-follow graphics to support your sales process. With the Certass Energy Ratings Scheme – also known as Thermal Ratings Register – you can have unlimited WER labels featuring your company name, helping to promote your business in the marketplace.

You can easily update your Window Energy Ratings stickers in line with your latest window specification, so you can meet the demands of your customers whilst incorporating new window and door technologies into your manufacturing process.

The unique design of our consumer-friendly labels makes it easy to understand, using the familiar ‘rainbow’ ratings system that homeowners can find on other energy rated products in their home, such as fridge freezers. As well as the A-G Window Energy Rating, our labels feature a unique Light Energy Transmittance and Heat Retention rating, to help promote the benefits of triple glazed units. Often, triple glazed units do not perform well with the WER rating methodology, as light transmittance is reduced due to the third pane of glass. With our simple-to-follow graphics, the beneficial effect of the improved U-Value is demonstrated clearly for all to see.

Energy Ratings Scheme

What is a Window
Energy Rating?

Window Energy Ratings are used as a measure of the energy performance of a window.

  • They are calculated using a mathematical formula, with values based on the energy balance of a notional house through an average UK year, with notional window sizes & configurations.
  • The performance of a real window, in a real building, will differ from that of the notional window used for the rating calculation. In some cases the performance will be better and in others it will be worse.
  • The purpose of a Window Energy Rating is to allow the energy performance of a window to be directly compared to another, under standard conditions.
  • All new and replacement windows either have to be rated C or better or have a U-value of 1.6 or lower.
  • The Building Regulations as amended in 2010 require replacement windows to be a minimum of a ‘C’ rating.
What is a Window<br>Energy Rating?

Certass’ Thermal Ratings
Register for Window Energy Ratings

  • Simple way to show energy efficiency of different window & door designs.
  • Uses simple A-G colour coding system, as seen on household appliances.
  • Generally, the higher the rating, the better the thermal efficiency and the greater the savings on fuel bills for homeowners.
  • Takes into account the amount of heat the window loses, amount of air that can escape through the frame, and the benefit of heat energy gained from solar.
  • Cost-effective system to register window designs with streamlined registration process.

What does it cost to be able
to issue Window Energy Rating Labels

  • Small annual fee from Certass
  • Cost of an air leakage test report
  • Cost to provide the doorset for the air leakage test(s)
  • Cost of any simulations/analysis required to determine scores to establish ratings
  • Any costs associated with an auditing body – such as Thermal Ratings Register or body approved by Thermal Ratings Register

Window Energy Ratings for Fabricators & Insulated Glass Unit Manufacturers

Membership

Only £39 (+VAT) per month

Includes unlimited labels using our simple online calculator, or submitted thermal calculations.

Window Energy Ratings for Trade Frame Suppliers

Membership

Only £29 (+VAT) per month

Includes unlimited labels using our simple online calculator, or submitted thermal calculations.

Window Energy Ratings for Installers

Membership

Only £5+VAT per month to Certass CPS members

Includes unlimited labels using our simple online calculator, or submitted thermal calculations.

Join Certass Today
CE Marking

CE Marking

The CE Mark is a common place sight on today’s consumer electronics as well as a host of other products we all use every day. The Construction Products Regulation brought mandatory CE marking to glazing products from 1st July 2013.

The manufacturer of the window/door product is the company responsible for the CE marking of the window/door product. The CE Mark applies to the complete product, i.e. the whole window (both frame and glazing unit).

Am I a Manufacturer or an Installer?

INSTALLER - If you, as an installer, purchase a window including glass from a single supplier under one order, then your supplier is the manufacturer and responsible for providing you with a CE Marked product as from 1st July 2013.

In this case, all you need to do is make sure you buy the complete window product with a CE Mark from your supplier (the manufacturer).

MANUFACTURER - If you purchase the window frame and glazing unit from separate suppliers (or manufacture both) then you are deemed to be the manufacturer, as you are buying components (each of which should be individually CE Marked) and you must CE Mark the completed whole product.

In this case, you will need to know more about CE Marking. The following information outlines what you need to do next.

CE Mark Calculator for ‘Micro-enterprises’

The CE Mark is a common place sight on today’s consumer electronics as well as a host of other products we all use every day. The Construction Products Regulation brought mandatory CE marking to glazing products from 1st July 2013.

The manufacturer of the window/door product is the company responsible for the CE marking of the window/door product. The CE Mark applies to the complete product, i.e. the whole window (both frame and glazing unit).

CE Mark Calculator for ‘Micro-enterprises’

Join the Thermal
Ratings Register Today

Join Certass Today

Accreditation is easy!

  1. Register with Certass Thermal Ratings Register online.
  2. Provide an air leakage test report for the doorset at 50 Pascals by a UKAS approved test house.
  3. Provide a simulation report of the doorsets thermal properties to sizes laid out in BS EN 14351-1:2006+A1:2010.

NOTE: Certass does not carry out simulations or air pressure testing. Only approved simulators or air pressure tests will be accepted.
Please contact us prior to gaining this data to confirm that it is an accredited source.

Join Certass Trade Association

All Thermal Ratings Register Members are also part of the Certass Trade Association. Click for more information.

Join Certass Trade Association

Got a Question? We can help!

If you cant find an answer in our frequently asked questions section, try contacting us below:

Got a Question?

Existing Members 01292 502 396
Finance Enquiries 01292 502 397
New to Certass 01292 502 398

Contact Us

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The quickest way to get the answer to your question, live chat with our online team.

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Get Certified

Register now to get Certass Certfied and start adding to your certifications.

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