Dempsey Dyer Windows, Doors & Conservatories

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Energy Efficient Windows

Since our incorporation in 1977 we have been committed to manufacturing energy efficient windows that achieve at least the minimum life expectancy. This has led to us partnering ourselves with companies such as Deceuninck, Maco and Securistyle, who are all well respected names within the industry.

In early 2006, we realised the importance of not only developing durable windows, but also developing windows that are energy efficient. Consequently we quickly understood the importance of communicating this to our customers and therefore became involved with the BFRC. In response to the amendments to 'Document L' legislation for replacement windows in late 2010, we took the decision to achieve both "A" and "C" window energy ratings across all three of our UPVC profile systems.

We currently have both UPVC and timber energy rated windows available for both trade and commercial customers.

Energy Rated Window Options

The below table summarises the availability of the window energy ratings for our energy efficient window products.

BFRC LabelProfileWhole Frame U-ValueCentre Pane U-ValueWhole Frame Solar Gain (G) FactorGlass Soldar Gain (G) FactorGlass Make-up
 energy rated window 1327 Dempsey II Stormproof window manufactured with the timber species "Accoya". 1.4 W/m² K 1.163 W/m² K 0.43 0.71 4-16-4
 energy rated window 2803 Deceuninck 2500 "Chamfered" profile system (fully reinforced). 1.4 W/m² K 1.221 W/m² K 0.47 0.74 4-20-4
 energy rated window 2804 Deceuninck 2500 "Chamfered" profile system (fully reinforced). 1.6 W/m² K 1.221 W/m² K 0.45 0.71 4-20-4 
 energy rated window 2805 Deceuninck 2800 "Decorative" profile system (fully reinforced). 1.4 W/m² K 1.221 W/m² K 0.45 0.71  4-20-4 
 energy rated window 2806 Deceuninck 2800 "Decorative" profile system (fully reinforced). 1.6 W/m² K 1.221 W/m² K 0.45 0.71  4-20-4 

For further information on our range of energy efificient windows, please contact a member of the sales team who will be happy to assist with your enquiry.