Häuslebau3r
2015-02-13 09:02:41
- #1
Good morning everyone,
due to my current situation and the other threads (topics) that interest me and that I am currently dealing with, I thought it might be helpful to create a special thread regarding the different "most commonly used" construction possibilities (energy standards). From isolated topics and posts, I have already been able to gather quite a bit from the forum. After attending a lecture on "Energy-efficient Building" this week, a few more questions have arisen that might also be helpful for others. I want to point out that the information below so far consists only of research and I would therefore like to have some practice-related information or these might often deviate from theory.
The most commonly used energy standards for me currently are the following:
- Kfw 70, KFW 55, KFW40, Passive House.
What currently concerns me is also the step of which means can be used to achieve the different standards and whether a comparison of the cost/benefit factor is even possible. Can one say in percentage terms from which point on a house with a higher energy standard amortizes compared to a "normal" one?
Subsidies:
- For KfW 70 / 55 / 40 you get different interest rates, these are adjusted to the current market. For KFW 70 this is currently 1% loan interest for an amount of €50,000.
- For KfW 55 / 40 you also get a loan of €50,000 at the current loan interest rate of 0.75% plus a €2,500 repayment grant.
- Passive House corresponds to the same subsidies as KFW 55.
Regional subsidies are not included here. These should be inquired about locally.
The current energy standards are linked to the regulations of the Energy Saving Ordinance (Energieeinsparverordnung). These regulations are linked to new agreements in certain sections and in the current case, this concerns the Energy Saving Ordinance 2016.
From January 1, 2016, this means the following:
- Energy efficiency of the building: The maximum allowable annual primary energy demand (for heating, water heating, ventilation, cooling and for non-residential buildings also for built-in lighting) decreases by 25 percent compared to the current Energy Saving Ordinance 2009, or the coming
- Thermal protection of the building envelope: The maximum allowed average heat loss through the building envelope decreases by approx. 20 percent compared to the current Energy Saving Ordinance 2009, or the upcoming Energy Saving Ordinance 2014.
Furthermore, for the construction of a house to the KFW 70 standard, a construction-related measure by an energy consultant is also necessary. Until now, this was prescribed only for KFW 55 and better. According to information from a construction company near me, additional costs for the energy certificate and a construction-related measure by an energy consultant amount to about €350 + €2,300 even for the KFW 70 standard. Values may vary.
The question that now arises for me is how and what (how) one would have to build (possibly invest more on average) in order to achieve the respective standards?
Is a Passive House with a brick-on-brick solution even feasible? From what I have gathered, you would either need such thick wall widths or you must reach the standard with exterior insulation if you do not want to resort to prefabricated construction.
Do I also need a ventilation system in a KFW 70 house, or is that only necessary due to the enormous insulation at KFW 55 / 40 / Passive House?
I would be grateful for further information and comments on this topic.
due to my current situation and the other threads (topics) that interest me and that I am currently dealing with, I thought it might be helpful to create a special thread regarding the different "most commonly used" construction possibilities (energy standards). From isolated topics and posts, I have already been able to gather quite a bit from the forum. After attending a lecture on "Energy-efficient Building" this week, a few more questions have arisen that might also be helpful for others. I want to point out that the information below so far consists only of research and I would therefore like to have some practice-related information or these might often deviate from theory.
The most commonly used energy standards for me currently are the following:
- Kfw 70, KFW 55, KFW40, Passive House.
What currently concerns me is also the step of which means can be used to achieve the different standards and whether a comparison of the cost/benefit factor is even possible. Can one say in percentage terms from which point on a house with a higher energy standard amortizes compared to a "normal" one?
Subsidies:
- For KfW 70 / 55 / 40 you get different interest rates, these are adjusted to the current market. For KFW 70 this is currently 1% loan interest for an amount of €50,000.
- For KfW 55 / 40 you also get a loan of €50,000 at the current loan interest rate of 0.75% plus a €2,500 repayment grant.
- Passive House corresponds to the same subsidies as KFW 55.
Regional subsidies are not included here. These should be inquired about locally.
The current energy standards are linked to the regulations of the Energy Saving Ordinance (Energieeinsparverordnung). These regulations are linked to new agreements in certain sections and in the current case, this concerns the Energy Saving Ordinance 2016.
From January 1, 2016, this means the following:
- Energy efficiency of the building: The maximum allowable annual primary energy demand (for heating, water heating, ventilation, cooling and for non-residential buildings also for built-in lighting) decreases by 25 percent compared to the current Energy Saving Ordinance 2009, or the coming
- Thermal protection of the building envelope: The maximum allowed average heat loss through the building envelope decreases by approx. 20 percent compared to the current Energy Saving Ordinance 2009, or the upcoming Energy Saving Ordinance 2014.
Furthermore, for the construction of a house to the KFW 70 standard, a construction-related measure by an energy consultant is also necessary. Until now, this was prescribed only for KFW 55 and better. According to information from a construction company near me, additional costs for the energy certificate and a construction-related measure by an energy consultant amount to about €350 + €2,300 even for the KFW 70 standard. Values may vary.
The question that now arises for me is how and what (how) one would have to build (possibly invest more on average) in order to achieve the respective standards?
Is a Passive House with a brick-on-brick solution even feasible? From what I have gathered, you would either need such thick wall widths or you must reach the standard with exterior insulation if you do not want to resort to prefabricated construction.
Do I also need a ventilation system in a KFW 70 house, or is that only necessary due to the enormous insulation at KFW 55 / 40 / Passive House?
I would be grateful for further information and comments on this topic.