ᐅ 2016 KfW Efficiency House 55 based on reference values (U-values)
Created on: 5 Oct 2015 21:40
W
world-e
Hello,
has anyone examined the alternative verification of a KfW Efficiency House 55 based on reference values, which will come into effect from April 2016? Reference values are given to achieve a KfW 55 house:
Roof surfaces, top floor ceiling, dormers U ≤ 0.14 W/(m²·K)
Windows and other transparent components Uw ≤ 0.90 W/(m²·K)
Exterior walls, floor ceilings facing the outside air U ≤ 0.20 W/(m²·K)
However, the U-values do not seem very good to me, especially since the requirements will be tightened again by 20–25% in 2016 and rather correspond to the current KfW 40 standard. In my opinion, the U-values of a current KfW 40 house are considerably better.
I would appreciate your opinions. Thank you.
Best regards
has anyone examined the alternative verification of a KfW Efficiency House 55 based on reference values, which will come into effect from April 2016? Reference values are given to achieve a KfW 55 house:
Roof surfaces, top floor ceiling, dormers U ≤ 0.14 W/(m²·K)
Windows and other transparent components Uw ≤ 0.90 W/(m²·K)
Exterior walls, floor ceilings facing the outside air U ≤ 0.20 W/(m²·K)
However, the U-values do not seem very good to me, especially since the requirements will be tightened again by 20–25% in 2016 and rather correspond to the current KfW 40 standard. In my opinion, the U-values of a current KfW 40 house are considerably better.
I would appreciate your opinions. Thank you.
Best regards
B
Bauexperte23 Feb 2016 10:32PhiTh schrieb:
Who needs to certify this proof? Is the architect sufficient here, or does it have to be an energy consultant? KFW 55 compliance must be verified and supervised by an energy consultant or assessor. If an architect is also a certified energy consultant, they can do it; otherwise, they cannot.
PhiTh schrieb:
What if, for example, the windows don’t meet the requirements? Can this be compensated by better-insulated exterior walls, or will you quickly need to perform a more complex calculation again? That’s the – sorry – "crazy" part of the whole funding situation. Overall, the requirements must be met; it doesn’t matter where the specific adjustments are made. So, if your windows don’t comply, you can compensate by adding stronger insulation to the roof, using "better" masonry, or increasing insulation below the slab, and that will be sufficient.
Best regards, Bauexperte
Bauexperte schrieb:
KfW 55 must be verified and supervised by an energy consultant/expert. If an architect is certified as an energy consultant, they can provide this service; otherwise, they cannot.Doesn't the consultant also have to be independent? In other words, the architect working on your own project is disqualified?
B
Bauexperte23 Feb 2016 10:35SirSydom schrieb:
Does he not also need to be independent? In other words, the architect must be separate? He must not be connected with the general contractor (GC) who will carry out the work later.
Regards, Bauexperte
Bauexperte schrieb:
He must not have any ties to the general contractor or main contractor who will carry out the work later.
Regards, BauexperteAnd what if the architect manages tendering and construction supervision? Work phases 1-9?
B
Bauexperte23 Feb 2016 10:41SirSydom schrieb:
And what if the architect handles tendering and construction supervision? Work stages 1-9? Then, of course not, since he would basically be approving his own work.
Best regards, Bauexperte
Similar topics