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Thick insulation of 300-500 mm helps reduce heat loss from the building envelope (U-value below 0.15).

Low-energy, triple-glazed windows and super-insulated window frames (Window<0.8 w/(m2k) g-value ~ 50%).

No thermal bridges. Careful installation methods especially around joints, corners and materials causing high energy loss.
Controlled ventilation with a heat recovery of at least 75% ensures good indoor air quality with low-energy use.
The building must be airtight ( n50 < 0.6 h-1 ) without any gaps in order to reduce uncontrolled ventilation by approx. 90%.

Optimising the building orientation for solar gain (or protection) helps save energy.
Use low energy refrigerators, TVs and other appliances in order to save energy and prevent extra heat loads during hot summer months.


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