Energy efficiency in windows and doors

At Ventanas y Puertas Calpe, we understand how important energy efficiency is when choosing windows and doors for your home. High-efficiency windows not only bring greater comfort and well-being, they also contribute directly to energy savings and environmental sustainability.

What is energy efficiency in windows and doors?

The energy efficiency of windows and doors is measured using a standardised rating in Spain, which ranges from the letter To (maximum efficiency) to G (lowest energy performance). This scale lets consumers clearly identify a product's thermal insulation capacity, making it easier to make an informed and responsible choice.

This rating does not just assess a single component; it considers the thermal performance of the whole window or door, including both the glass and the frame. This gives a complete assessment of the product, making sure that every element affecting insulation and efficiency is taken into account.

The U-value: thermal transmittance

A key factor in the energy efficiency rating is the U-value (thermal transmittance), an indicator that measures the amount of heat passing through a material. It is expressed in W/m²K (watts per square metre kelvin).

• The lower the U-value, the better the thermal insulation of the window or door.
• A lower U-value means less heat loss in winter and better retention of cool air in summer, optimising the energy used for heating and cooling.

Besides the U-value, other aspects are decisive in the energy rating:

• • Type of glass: Low-emissivity glass or glass with solar-control coatings greatly improves efficiency.
  • The gap between the glass panes: Using double or triple glazing with air or argon gas cavities between the panes reduces heat transfer.
  • Frame material and design: PVC frames, especially high-quality ones like those we offer at Ventanas y Puertas Calpe, stand out for their low thermal conductivity.
  • Seals and gaskets: A high-quality gasket system prevents air leaks and improves insulation.

Choosing windows and doors with a higher energy rating brings many benefits for both your home and the environment:

 Energy savings: Lower heating and air-conditioning consumption, which means a direct reduction in your energy bill.

 Thermal and acoustic comfort: Better insulation against outside temperatures and annoying noise.

Sustainability: Lower energy consumption reduces your carbon footprint and environmental impact.

 Increase in property value: An efficient, well-insulated home is more attractive on the property market.

Access to grants and subsidies: High-efficiency windows and doors may qualify for state grant programmes for the energy renovation of homes.