ᐅ Building Energy Act Calculations – Are They Required? And Who Prepares Them?
Created on: 14 Jun 2022 23:22
E
Elias_dee
Hello friends,
So far, we do not have an energy performance certificate or calculation for our new build (single-family house, not for rental). The architect planned with 36.5 bricks, there is a ground-source heat pump, and a central ventilation system with heat recovery.
The general contractor building for us says they never do the energy performance calculation.
The expert we hired to inspect the build (starting in October) says that a calculation is necessary, at least to correctly select insulation materials, wall thicknesses, etc., and that it should come from the general contractor.
Now I am confused, so here are my questions:
1. Who is usually responsible for this?
2. Do I have to commission it myself? From what I understand, I must of course comply with the energy performance regulations / building energy law, but no official from the city where I am building will actually inspect or measure anything inside my single-family house after it is finished, right? And I would only need proof when selling or renting it out – correct?
3. If it is not possible without the calculation, how much does it roughly cost? Can someone share their experience?
Thanks!
So far, we do not have an energy performance certificate or calculation for our new build (single-family house, not for rental). The architect planned with 36.5 bricks, there is a ground-source heat pump, and a central ventilation system with heat recovery.
The general contractor building for us says they never do the energy performance calculation.
The expert we hired to inspect the build (starting in October) says that a calculation is necessary, at least to correctly select insulation materials, wall thicknesses, etc., and that it should come from the general contractor.
Now I am confused, so here are my questions:
1. Who is usually responsible for this?
2. Do I have to commission it myself? From what I understand, I must of course comply with the energy performance regulations / building energy law, but no official from the city where I am building will actually inspect or measure anything inside my single-family house after it is finished, right? And I would only need proof when selling or renting it out – correct?
3. If it is not possible without the calculation, how much does it roughly cost? Can someone share their experience?
Thanks!
sergutsh schrieb:
How is it ensured without the calculation? Maybe just by estimation, using the "it’s fine like that..." approach ;-)Just like the diameter of your toilet’s soil pipe 😉E
Elias_dee20 Jun 2022 10:23My general contractor says that the materials used exceed the standard, so he does not provide a calculation and considers this the architect’s responsibility. I tend to believe him, and my basic knowledge also suggests that our house will meet closer to KfW55 rather than KfW70.
Still, if someone comes along and wants proof, we simply don’t have anything. That’s why we have now commissioned it.
Still, if someone comes along and wants proof, we simply don’t have anything. That’s why we have now commissioned it.
Elias_dee schrieb:
So, my general contractor says that the materials used exceed the standard, so he’s not doing any calculations and considers that the architect’s responsibility. I actually believe him, and even with my basic knowledge, I think our house will be closer to KFW55 than KFW70.
Still, if someone asks for proof, we don’t have anything. That’s why we’ve now commissioned it. That’s fine, but which standard from which century does your general contractor assume? And would KFW70 even still be acceptable? (When was the building permit / planning permission granted?) And even if he uses materials that exceed the standard, does he install them properly without thermal or cold bridges?
By the way, I’ve also seen quotes basically stating: one server unit is sufficient speed (seriously!)
ypg schrieb:
Just like the diameter of the waste pipe of your toilet 😉You probably won’t believe it, but the required pipe diameter is also regulated by a DIN standard (DIN 1986) ;-)Elias_dee schrieb:
...
this is the architect’s responsibility.
...He may actually be right there, since the planning is indeed the architect’s responsibility.sergutsh schrieb:
You probably won’t believe it, but the required pipe diameter is also regulated by a DIN standard (DIN 1986) ;-)Exactly! But the pipe itself does not need to be separately requested, nor is there a calculation included in the building permit / planning permission application because it is governed by a DIN standard. And for that reason, it might be the case that a house built according to the applicable building energy law, meaning the minimum standard, does not need to be specifically demonstrated. This is just a thought and assumption from me, nothing more.
Similar topics