What is the energy-efficient construction about?
Why is it a good idea to build with energy efficiency? The advantages of the energy-efficient construction include Reduced consumption of power and thus of natural resources required to produce it.
The purpose of energy-efficient construction is to build a house that, thanks to its structure and the materials used, allows to warm up all rooms faster, use less energy to Warm it up, and also counteract the heat loss inside the house. A building is considered energy-efficient if it consumes less than 70 kWh/m2 of energy a year.
An energy-efficient house – what does it mean?
Energy-efficient construction usually involves small houses with a simple shape that makes them way easier to warm up. Specialists recommend two-story houses, although there are also energy-saving one-story houses – having the upstairs, however, causes less heat to escape through the roof.
The southern facade of an energy-efficient house has a lot of glass panes, as sunlight should also warm up the house – and using a large number of windows makes it really successful. An energy-efficient house has double-layer or even triple-layer walls – which prevents heat from escaping from the inside through them. Another important thing is Proper insulation of the house – that’s because even triple-layer walls won’t ensure one hundred percent protection from heat escaping from the inside.
Proper thermal insulation
One of the most important elements is adequate thermal insulation of the building and limited heat loss. When it comes to single-family houses, the greatest contribution to heat loss comes from external windows, air-vents, external walls and the roof. It is necessary to thermally insulate windows, balcony and external doors, walls, roofs, ceilings, flat roofs and floors on the ground level. It also means that such house should have a compact structure, developed in a way that eliminates thermal bridges.
Such bridges obviously lead to increased heat loss, interior Humidification, and consequently to development of mold. With a properly designed house shape and adequate house insulation, the heat penetration ratio at the weakest point of an external wall might be even as low as about 0.07 W/m2K.
Construction material – lower construction costs
Also not without significance is the material the house was made of. Among the solutions that are growing in popularity here are porous concrete, silicate brick, framework technologies, prefabricated elements such as foamed polystyrene, which allows to ditch the typical construction materials – bricks and concrete.
This material has great thermal properties and makes it possible to easily and cheaply achieve the passive house standards. In other words – there are technologies being developed these days that make it possible to raise houses complying with the energy-efficient standards at much lower costs.
Solutions for energy-efficient people
The investors that wish to achieve the lowest possible energy consumption level when using the house or apartment utilize numerous innovative technological solutions – in most cases recuperators, solar panels or heat pumps. These so-called green energy sources allow to use about 70 percent less energy compared to houses build with Traditional technologies.
Heat pumps are devices that make it possible to heat interiors and water using the ambient heat – from the ground, from water or from air. Such pump makes it possible to generate heat in a green way. The device is suitable both for new buildings as well as for modernized ones, as it can be easily connected with the existing heating systems.