Energy rehabilitation

If you plan to reform or rehabilitate your home or business, whether from neighborhood associations or individuals, request advice to incorporate to the study one of the most important aspects, not the immediate future, but the present: measures to encourage saving energy that will ultimately directly impact into your pocket and contribute personally and directly to building a more sustainable planet
Energy demand of buildings depends on many variables but in general we could state that it is distributed as follows:
40% of the demand comes from the air conditioning (heating and cooling)
25% comes from DHW
25% comes from the use of kitchens and appliances

The application of energy rehabilitation measures may involve energy savings of 20%, which means 200 kg equivalent to oil per household / year and reduce CO2 emissions by up to 30%

The main factors influencing the energy needs of buildings, and therefore in final consumption, are as follows:
Climate zone and orientation of the building
Shape and volume of the building or housing
Constructive section of the envelope (walls and roofs)
Type of facilities and equipment
Avaliable energy sources
In the present case, existing buildings, energy rehabilitation focuses mainly on the last 3 points:
1. Constructive section of the envelope (walls and roofs). Consists in reducing energy demand cherishing better housing. That means better insulation and joinery.
2. Type of facilities and equipment. It basically means improving or replacing existing equipment with higher-performance and lower consumption. Boilers, air conditioning machines, lighting, etc.
3. Avaliable energy sources. Fuel changing within the possibilities. Seek alternative sources and combine them with the aim of reducing costs and pollution. Solar panels, wind, geothermal, biomass, etc.