Energy Efficiency

Each of our double glazed windows are highly energy efficient and come with a guaranteed Window Energy Rating (WER) of A+12, one of the highest available on the double glazing market. Window Energy Ratings are an excellent way of monitoring the energy efficiency of your home and can now be determined by the helpful colour chart ranging from A (which is great) to G (which is the least energy efficient).

uPVC Double Glazing Dartford Kent


We guarantee that the Energy Saving Trust Recommended logo is clearly displayed on each of our double glazed products. All of our windows, doors and conservatories meet strict energy efficiency criteria as set out by the Energy Saving Trust.


Energy Saving Trust


Thanks to our A+12 Window Energy Rating it becomes so much easier to save money on your heating costs. Your new double glazing is designed to maintain an extra 12 kWh per m² each year over a standard A+0 rated window.

Environmentally Friendly

100% Recyclable100% Recyclable

As you know, recycling has become an important part of our lives in order to help contribute to a cleaner living environment. Our UPVC profiles never contain steel reinforcements and are 100% lead free but are equally as strong.

Lead-Free MaterialsLead Free

Averi’s UPVC windows are 100% lead-free. The dangers of lead are well known which is why we actively supply lead-free double glazing to help our environment.

Low Carbon FootprintLow Carbon Emissions

Without even having to actively do anything, having new double glazing installed by Averi Windows and Building Services Ltd will reduce your carbon footprint and the CO2 emissions you produce by approximately 2/3 of a tonne each year.


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