Houses and flats energy efficient - that is, what ?

Allows you to reduce energy consumption , minimize heat loss , reduce operating costs , and - the acquisition of an apartment or home. What in fact is building energy efficient ?

Energy efficient and passive - not only by name !

In the first quarter of 2013 will commence payments of the National Fund for Environmental Protection and Water Management for buyers interested in living in buildings with low energy consumption. The grant may apply for individuals planning to build a house or buy locale - energy-efficient home or apartment from the developer . Before making a final decision on the mortgage of the said charge , it is worth to check - what the buyer is the fact that his future home will be energy efficient ? And what exactly is different from the passive ?

Low energy house is a building that used by design and technical solutions can be operated with less than a conventional construction, energy - especially the heat - for heating and domestic hot water . At the same time a house is cheaper to operate, friendly to humans and the environment. The energy-efficient homes energy demand for heating ( EuCO ) is ≤ 40kWh / ( m2year ) - Buildings in standard NF40 .

The passive house energy demand for heating is less than traditional buildings constructed according to the applicable standards and energy-efficient buildings - is only 15kWh / ( m2year ) - standard NF15 .

Obtaining standard NF40 ( for energy-efficient home ) or NF15 ( passive house ) forcing investors to introduce comprehensive changes to the requirements for thermal insulation of external walls , the type of ventilation and air tightness home. How can this be achieved?

Proper insulation

One of the most important elements is suitable thermal insulation of the building and reducing heat loss . In the case of single-family houses the largest share in the losses of heat have external windows , ventilation, exterior walls and roof. It is necessary thermal insulation of windows, doors and exterior walls , roofs , floors , ceilings and floors on the ground . It also means that a house should have a compact body , educated in a way that eliminates thermal bridges . Bridges such obviously lead to increased heat loss , wetting the interior , resulting in the formation of mold. With properly designed shape and appropriate thermal insulation of the building heat transfer coefficient in the least favorable location of the outer wall may be as high as about 0.07 W/m2K. The more compact shape of the building , without a large number of dormers , bay windows and balconies including the execution phase easier and lower construction costs.

Building material - lower cost of construction

Not without significance is the material from which the house is constructed . Increasingly used for this purpose concrete, brick , lime , technology backbone , prefabricated expanded polystyrene for example , so-called . Neopor ®, which allows the resignations of typical building materials - bricks and concrete. This material has excellent thermal performance and allows for an easy and inexpensive way to achieve passive house standards . In a word - created technology today that allow you to erect houses that meet energy efficiency standards significantly lower expenditures . As a result, energy-saving , more than a hundred-meter house you can bet inclusive 50 square meter flat in the city center .

Solutions for energy-efficient

Investors who want to obtain the lowest possible level of energy consumption during the operation of a house or apartment use a variety of technological innovations - the most common heat recovery units , solar collectors and heat pumps . These so-called . green energy sources allow them to consume about 70 percent . less energy than homes built in the traditional technology .

Heat pumps are devices that allow for space and water heating using exhaust heat from the environment - the land, water or air . With such a pump , economically produce heat. The device is suitable for both new build and retrofit , because they can be freely combined with existing heating systems .

Pompa ciepła powietrze-woda

Obtaining a standard or passive energy-efficient home will require also reduce the demand for energy needed to heat the incoming fresh air . In homes with lower energy consumption is replaced by the so gravitational ventilation - mechanical ventilation intake - exhaust . Such a system consists of two fans - supply and exhaust . Outside air enters into the main air duct and smaller cables distributes air to each room . Exhaust air collecting passage is disposed , which is located outside the building.

The ventilation systems, heat recovery units are used , ie installations allowing heat recovery from exhaust air outside the building and the continuous exchange of air - which entails additional advantages. A mechanical ventilation system with heat recovery air cooperating with the heat pump type air - water provides not only economic heating in winter , but also comfortable space cooling in summer . Such ventilation provides the perfect microclimate interior regardless of the weather conditions - with air filtration frees residents from all allergens.

System rekuperacji w domach energooszczednych

These solutions provide large savings in the subsequent operation of the building.

Proper orientation of the building and premises

Reduced energy consumption is possible due to the applied appropriate design and technical solutions . It is very important so the appropriate location of the building and rooms. It is about proper orientation relative to the world of real estate , the relative placement of the rooms inside the building , the amount thereof and the use of a particular type of windows. Spaces such as a pantry , closet or bathroom should be on the north side , while the bedroom or dining room - on the south side . After the sunlit worth using large windows , which will minimize heat loss , on the north side - smaller. It is also important that the interior is not too high, because every inch is obviously increases the need to heat the room .

Although the requirements for the distribution of rooms have no direct impact on the demand for usable energy for heating the building ( beyond the requirements for the architecture) may, however, help to reduce the cost of operation and increase comfort - as in houses , as well as in apartment buildings .

Reduced cost of construction , purchase and maintenance

Subsidies for energy-efficient construction make houses and apartments will be cheaper to build and purchase, and therefore more popular among the Buyers . Houses cheap to purchase and construction, saving energy and thus money and is a suitable solution for people who want a high comfort , lower operating costs and protect the environment !