Saving energy by replacing old windows with energy-efficient windows

Up to 35% energy savings

Fuels are expensive on a daily basis, their inventories are continually decreasing, and electricity is also valuable.

The global climate is changing because of the uncontrolled human intervention in the environment and the misuse of available energy resources.

What would you say while saving money to contribute to the stability of the national economy and at the same time reduce your personal contribution to global warming and climate change?

The use thermal insulated windows in your home can strongly support the above goals, since for the heating and cooling needs of homes higher energy is consumed.

During the winter, there is heat loss from the inside out, and respectively during summer months, the heat enters from the outside. If we analyze the responsibilities of structural elements of thermal leakage in a home we realize that

  • the 20% of heat loss is due to the roofing
  • the 25% of the heat loss is due to the walls
  • the 20% of the heat loss is due to the floor
  • the 35% of the heat loss is due to the frames

Therefore, according to the above research, the use of thermal insulator reduces the heat loss up to 35% compared to a simple frame, and can reduce heating costs up to 25%.

Adding up all the above, and given that in apartment buildings the losses due to roofing and floors can be easily reduced, we conclude that the most cost-effective way to reduce heat losses and thus save money for cooling and heating is to manufacture frames and doors by using thermal insulating systems and advanced energy glass panes.

Urgent need for energy saving

In recent years, there has been a significant increase in the population living in urban and semi-urban areas.

More than 50% of earth’s population now lives in cities, whereas 100 years ago only 14% were living in urban areas. Estimates show that in 2100, the 80% of the world’s population will live in cities!

Today, there are more than 170 cities around the world with a population of over 1,000,000. It is even expected that in the next 10 years, 700 million people worldwide will move to cities.

Because of the high urbanization of the population as almost 80% of Europeans already live in cities and the fact that cities need more than 40% of the total energy produced to meet the needs of their residents for heating, cooling, lighting and hot water, the need to take energy-saving measures for the overall benefit to the state and family budget is immediately apparent and imperative.

Research has shown that the use of thermal insulation in buildings can significantly reduce energy consumption up to 35%.

Measurements made in 2007 in residential buildings in Athens that do not have double glazing windows and heat insulation, recorded an internal temperature of 50% during the year, which corresponds to 34°C, while during some days we observed a temperatures of 42°C.

The capability of a frame to prevent heat transfer from one side to another is determined by a size called thermal transmittance indicator (U-value or K-Uvalue=W/m2K). The thermal transmittance indicator is measured in Watts per square meter and measures the temperature difference between outdoor and indoor environment in degrees Kelvin scale. The lower the U-value, the higher the products resistance to heat flow (thermal efficiency) and the better its insulating properties.

To achieve an excellent thermal insulation performance in its frames, ALVEK collaborates with branded profile extrusions with aiming to the well-designed insulation frames by ranking them in the highest performance categories according to European and International standards.

Summary of benefits of energy-efficient glass panes

  1. More efficient thermal insulation during winter
  2. Easier cooling during summer
  3. Reduce of annual heating and cooling costs up to 40%
  4. Substantial contribution to environmental protection
  5. Reduce up to 70% of incoming UV radiation that damage curtains, rugs, furniture and more.
  6. The difference in costs from double glass is not great and their depreciation shall be done within 1 year
  7. Similar to simple glass

What we must be cautious of

Energy glasses are particularly difficult to be processed as they require special handling and in particular require the availability of specialized machinery, which few window makers have in Greece.

Architectural solutions using products of Alvek for building restorations

Alvek has developed complete solutions for replacing and upgrading old frames in private apartments sand professional spaces.

Alvek’s systems replace all types of old frames (wooden, aluminum, etc.) in the best and fastest way, whether they are simple and with single glass, with rolling shutters or with shutters.

A recent study carried out by the Technical University of Thessaloniki examined in detail the energy saving by replacing the frames in existing buildings (in different climatic conditions) with new thermal insulation frames in different types of buildings (house, apartments) and with different type of frames (sliding, swing, different thermal transmittance value Uvalue, etc). The study shows that the replacing of frames in non-insulated buildings with new aluminum insulating frames can save 25-30% of energy for heating and 14-18% for cooling.

Alvek systems have the best European thermal transmittance indicators in combination with energy-efficient glass panels reaching the 40% for heating.

Alvek, with more than 35 years of experience, is now one of the most developed companies in the design and production of cutting-edge production lines.

Alvek is among the elite of Europe’s leading suppliers of aluminum frames and synthetic architectural solutions, meeting the growing demands of international markets for

  • Safety (from burglaries, gunfire, fire, smoke, earthquakes)
  • Energy saving and energy production (with high thermal insulation, controlled shading)
  • Protection in extreme weather conditions (high wind resistance and waterproofing)
  • High aesthetics that support all architectural trends