basics:affordability:investing_in_energy_efficiency:are_passive_houses_cost-effective
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basics:affordability:investing_in_energy_efficiency:are_passive_houses_cost-effective [2019/05/08 13:33] – [Remark about possible changes in the boundary conditions:] cblagojevic | basics:affordability:investing_in_energy_efficiency:are_passive_houses_cost-effective [2022/04/04 16:24] (current) – [Remark about the boundary conditions in 2015:] wfeist | ||
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* Even lower real interest rates. That is an effect of a lot of capital being available on the market - and the frustration resulting from the bubbles in the past. This is not going to change soon: so 2% real interest rate is more probable to be the future boundary condition. | * Even lower real interest rates. That is an effect of a lot of capital being available on the market - and the frustration resulting from the bubbles in the past. This is not going to change soon: so 2% real interest rate is more probable to be the future boundary condition. | ||
- | But, what changed much more, are the extra investment costs of building a passive house now, in 2015: Triple pane glazings do now have already more than 70% market penetration and have dropped in price significantly. Also the Passive house windows are much less expensive since 2014 - and the same will become true for the ventilation systems. So, it's no longer 14000 €, it's less than 9500 € you need in addition to build a well working passive house (140 m²). And that difference changes the picture in a dramatic way (see figure ): In 2015 building a new residential building, and not building a passive house - that is just foolish from an economic point of view. | + | But, what changed much more, are the extra investment costs of building a passive house now, in 2015: Triple pane glazings do now have already more than 70% market penetration and have dropped in price significantly. Also the Passive house windows are much less expensive since 2014 - and the same will become true for the ventilation systems. So, it's no longer 14000 €, it's less than 9500 € you need in addition to build a well working passive house (140 m²). And that difference changes the picture in a dramatic way (see figure |
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basics/affordability/investing_in_energy_efficiency/are_passive_houses_cost-effective.1557315223.txt.gz · Last modified: 2019/05/08 13:33 by cblagojevic