Saving energy and money with triple glazing
Old and single-glazed windows let in the draught and are responsible for high heating costs. The thermal insulation of modern windows is much better than it was a few years ago. Here a comparison: a window with single glazing from the early nineteen eighties had an average heat transfer coefficient of approx. 5-6 W/m2K. Today, windows are not allowed to have a Uw-value greater than 1.3 W/m2K, already due to the Energy Saving Regulation (EnEV 2009). For the future, Uw-values of ≤ 0.95 W/m2K are already being considered. This corresponds to a saving of more than five times the amount of energy. This is the only way to reduce heating costs and energy consumption effectively. Today, the extra cost for triple glazing is minimal and amortisation is quickly accomplished through higher energy efficiency.
CO2 and heat cost savings using the Eforte window system as an example
||Standard version with steel reinforcement
||0,95 W / m2K
|Ug (triple glazing)
||0,6 W / m2K
||0,8 W / m2K (Passive house standard)
||1120 litres heating fuel / annum
|Saving in heating costs in the first year
|Reduced CO2 emissions per annum
||2240 kg / year
Calculation example in comparison with an old window with insulated glazing (Uw-value 2.8 W / m2K), standard window 1.23 m x 1.48 m. Basis for heating cost calculation: fuel costs 0.70 Euro / Litre, window area 50m2.
There are more than financial advantages for the residents. Modern apartments and houses with triple glazing also provide noticeably enhanced comfort and cosier living.
The financial savings when replacing your windows can be calculated with our energy saving calculator.