Funding and demanding
In addition to energy efficiency and statics, the "financial foundation" of the future security of the house must be guaranteed. Bisotherm products pave the way to benefit from government funding with interesting repayment subsidies and low interest rates.
The basis of any calculation of a possible funding is the latest energy conservation regulation (EnEV 2009), the current standard for every new house built.
It defines the limits for all relevant components of the building shell of the reference house, like exterior wall, roof, windows etc. and combines it with the values of the energy technology of a house. From these parameters, the calculated annual primary energy consumption of each house.
This individual value is the basis for determining the efficiency-house program of the KfW (Reconstruction Loan cooperation) bank for energy-efficient building:
- KfW Efficiency House 70
- KfW Efficiency House 55
- KfW Efficiency House 40
- Passive house
The number of each KfW efficiency-house program reflects the desired percentage of the annual primary energy consumption related to the EnEV 2009 standard.
A KfW Efficiency House 55, for example, is only allowed to consume 55% of the EnEV standard. The possibilities to optimize a home from the EnEV standard to a more efficient-house thus taking advantage of the low-interest loans and repayment subsidies are numerous.
Already, the optimization of a single component, such as the outer wall through the use of the highly insulating Bisomark-brick with a U-value of up to 0.15 W / mK (EnEV standard = 0.28 W / mK), can pave the way to a better efficiency-house class.
The additional financial expenses for an optimized insulation can be recouped by achieving the eligibility criteria and of course permanent lifelong savings on heating costs.
For the calculation of the passive house funding, the annual primary energy demand and the annual heating demand for the so-called Passive House Planning Package (PHPP) must be proven by an expert.
Unlike for efficiency-houses there are fixed consumption limits for the passive house. The annual primary energy consumption rate of 40 kWh/m2 and the annual heating demand of 15 kWh/m2 may not be exceed.
