energy class d in the average?

[Davimont]

Hello everyone,
Having several problems in the apartment purchased 2 years ago, I was pulling out the various documents to get someone to know more about me!
the building of new construction falls into class "d", now my curiosity was: but on average, the new constructions of medium value (1500€-1800€ to sqm), in what class do they fall?
I know it's very vague as a question but it was just to give me an idea:

 

[gfrank]

each building/house must fall into the expected class (energy consumption) according to the proper characteristics of the building (climate flux; s/v ratio; etc.) according to the legislation in force at the time of the presentation of the permit to build/dia, more precisely it must fall into the energy performance index eph, which is calculated with the parameters, as mentioned above.

the energy class includes a "range" of energy performance index values (eph min-eph max)

In my opinion, the real estate market has not yet accepted the "added value" of low energy consumption.
For example, if your apartment has an eph of 100 kwh/m2a (which falls in class d - lombardy), it must be less than the limit value, but this class has no influence on the "price" of the property.

a greater value to the property and given by those with energy conduct that falls in the classes a+; a; and b (up to 35/40), surely classes c and d do not give any added value.

as a personal opinion, the added value for the classes mentioned above, today is transposed from the real estate market (from buyers) as the "major" costs that the entrepreneur supports, compared to the construction of the same apartment to reach the class c (indicatively the minimum required), and not from the energy saving that will produce over time ....

Finally, with the real estate crisis in place for three years, buyers are tempted by the prices of the unsold, although the immobli are in class d/e.

p.s. if your property is in class d, energy level, it is not great ....

 

[Davimont]

thank you gfrank for answering me and clarifying some things.
In fact, that the property is a little scarce as insulation, I noticed I have walls facing north covered with mold! !
in the capitulate it is written that the perimeter walls had to be with air chamber and insulation material inside, in fact it is not so. the builder said that the walls were made anyway with materials equal to or better than those shown in the capitulate:mixed: but I have my doubts!!

I'll ask you something else.
the construction permit was required to the municipality in December 2005, at that time was not the obligation at least of the predisposition of solar thermal panels? here is nothing, while the twin palace built now has the solar panels already included.

 

[gfrank]

therefore it was in regime of dl 192/05, in effect from May 2005, that if not erro, it was to insert only the "predisposition" for solar panels.
request the manufacturer the "relation former law 10/91" or, as a owner, you can request it to the municipal technical department, which if drafted in accordance with the law then in force, will give you all the data you need.

the director of the works, at the time of testing/abitability must attest the conformity of the carried out regarding the approved project, consequently (at least) the materials used that make up the structure (strates) must exclude the formation of superficial and interstitial condensation (glaser), as well as the "structure" altogether, must enter into the transmittance (u) provided by the decree then in force (check the minimum "u" walls, previewed
In particular, the reduction of thermal bridges in correspondence of each change of stratigraphy of the external wall (angles, perimeter beams, perimeter pillars, perimeter perimeter perimeters, etc.)
windows (glasses and frames) must also be certified by the manufacturer for compliance with the limit values of transmittance

a span, to check if the insulation can be conform, check that with indoor temperature of 20° and with humidity of 50/60%, the surface temperature of the inner walls and the floor / ceiling, should not be less than 13/14° otherwise condensate.
If you have a thermometer (laser) you can measure the temperature on the inner walls, especially in the "angels" and at the pillars. If it's lower, it means that what's wrong...

 

[Davimont]

I tested with a classic thermometer, those hanging on the wall:biggrin:
temp environment 20°
humidity 57%
wall temperature 15°

in that place there is mold!:Mother:

As soon as I can see if I can recover the relationship you mentioned.
Thank you.