ᐅ Retrofitting an air conditioning system – will that affect KfW funding?
Created on: 10 Jun 2021 21:02
H
Helado
Good evening everyone,
Since October, we have been living in a prefabricated house built by Hanse Haus. We have been living here for about 5 months now and are very pleased.
However, at the moment, the indoor temperature in each room is between 26°C and 28°C (79°F and 82°F), even though it is similarly warm outside. The only way we can lower the temperature is by opening the windows at night.
We have a KFW55 standard and a Stiebel Eltron LWZ 5s Plus. Unfortunately, it does not have an active cooling function, but we have installed and activated the summer cassette in the menu settings. So far, this has not produced the desired result. The temperature remains the same.
We are now considering adding air conditioning, but we have been clearly advised that this might mean no longer meeting the KFW energy-saving regulation standards, and therefore, it might affect the eligibility for subsidies. Fortunately, it is not very hot outside at the moment, but when it reaches 35°C (95°F) outdoors, the temperature inside the house can easily rise to around 30°C (86°F), which is not exactly comfortable.
Does anyone have advice or experience with retrofitting air conditioning (in specific rooms) or with the same heating system?
Thanks & best regards
Helado
Since October, we have been living in a prefabricated house built by Hanse Haus. We have been living here for about 5 months now and are very pleased.
However, at the moment, the indoor temperature in each room is between 26°C and 28°C (79°F and 82°F), even though it is similarly warm outside. The only way we can lower the temperature is by opening the windows at night.
We have a KFW55 standard and a Stiebel Eltron LWZ 5s Plus. Unfortunately, it does not have an active cooling function, but we have installed and activated the summer cassette in the menu settings. So far, this has not produced the desired result. The temperature remains the same.
We are now considering adding air conditioning, but we have been clearly advised that this might mean no longer meeting the KFW energy-saving regulation standards, and therefore, it might affect the eligibility for subsidies. Fortunately, it is not very hot outside at the moment, but when it reaches 35°C (95°F) outdoors, the temperature inside the house can easily rise to around 30°C (86°F), which is not exactly comfortable.
Does anyone have advice or experience with retrofitting air conditioning (in specific rooms) or with the same heating system?
Thanks & best regards
Helado
Tarnari schrieb:
As a layperson (not using KFW subsidies), I wonder what air conditioning has to do with KFW. Does household electricity consumption also count towards the primary energy demand, which I understand is decisive for the classification? Active cooling must be included in the calculation of energy demand, otherwise you will quickly exceed the threshold for classification under the energy saving ordinance...
Scout schrieb:
Active cooling must be included when calculating the energy demand, otherwise you will quickly exceed the threshold set by the energy saving regulations... Ok, thanks for the clarification. I wouldn’t have thought that. So it probably needs thicker walls, better windows, or something else in order to be accounted for. In the end, KFW is just calculations anyway.
danixf schrieb:
Where there’s no complainant, there’s no judge.
I don’t have a KfW loan myself, but some here in the forum do. It would hardly ever get noticed anyway.. A sour neighbor or a vindictive lizard – and within the first 10 years, you might have to repay the repayment subsidy within a short period. For KfW-40, that would be 24,000 euros, for 40-Plus even 30,000 euros. With a popular pseudo-secondary apartment, it would be double accordingly. Possibly a fine on top of that. So you should first keep the repayment subsidy in cash instead of using it for landscaping.
KingJulien10 Jun 2021 23:00Helado schrieb:
Summer mode cassette installed and activated in the menu settingsEven though that’s not your main question, are you aware that your ventilation system will completely shut off when it’s too warm outside? A controlled mechanical ventilation system shouldn’t run idle without airflow for too long.
P
pagoni202010 Jun 2021 23:39Our energy consultant said exactly regarding this question that he would have to calculate it according to a different DIN standard, but—at least in our case—it would be possible. Apparently, an air conditioning system is not fundamentally excluded.
R
Reltaw202111 Jun 2021 08:49Would the situation be different if, instead of thicker windows, more photovoltaic panels were installed on the roof? At least then there would be some benefit throughout all seasons, and the surplus energy in summer could be used effectively.
Similar topics