ᐅ District Heating KfW55 - KfW70 Costs for Ventilation and Exhaust Systems
Created on: 1 Sep 2017 21:35
Z
zizzi
Hello everyone,
we are planning a bungalow.
We initially decided on KfW 70 because the payback period for KfW 55 is relatively long (the equipment that needs to be installed requires maintenance, can break down, and partly also consumes electricity). The highway is approximately 500 m (550 yards) from the property and despite a noise protection forest, it is still quite loud. Therefore, we want to plan a ventilation system, probably without heat recovery (ventilation with closed windows).
Today I found out that the property where we want to build is supplied with district heating.
The costs are as follows: one-time fee €9,500, annual basic price for 2017 calculated at €450 (subject to change), energy costs at 5.2 Ct./kWh (subject to change). The formulas for price adjustments are included in the contract (not yet signed) but they are not easily understandable for everyone.
There is an advantage here: the primary energy factor is 0.43 (certified and valid until 2024). According to the energy supplier (municipal utility), the representative told me that KfW 55 standards can only be met with additional thermal insulation compared to KfW 70 (without further measures).
What are your opinions on the resulting maintenance costs, experiences with district heating, and KfW 70 versus KfW 55?
we are planning a bungalow.
We initially decided on KfW 70 because the payback period for KfW 55 is relatively long (the equipment that needs to be installed requires maintenance, can break down, and partly also consumes electricity). The highway is approximately 500 m (550 yards) from the property and despite a noise protection forest, it is still quite loud. Therefore, we want to plan a ventilation system, probably without heat recovery (ventilation with closed windows).
Today I found out that the property where we want to build is supplied with district heating.
The costs are as follows: one-time fee €9,500, annual basic price for 2017 calculated at €450 (subject to change), energy costs at 5.2 Ct./kWh (subject to change). The formulas for price adjustments are included in the contract (not yet signed) but they are not easily understandable for everyone.
There is an advantage here: the primary energy factor is 0.43 (certified and valid until 2024). According to the energy supplier (municipal utility), the representative told me that KfW 55 standards can only be met with additional thermal insulation compared to KfW 70 (without further measures).
What are your opinions on the resulting maintenance costs, experiences with district heating, and KfW 70 versus KfW 55?
Nordlys schrieb:
Secondly, because it is technically simple and therefore less prone to issues. ...and this could be viewed differently. Having at least one hole in the wall with control electronics and an EC fan in every room... versus a unit in the basement with a single control system and two large fans (supply/exhaust air)... to me, the latter sounds less complex. Everything else is maintenance-free, except for the filters. In the centralized case, you can replace them quickly and easily in one location, whereas with decentral systems, you have to walk through the entire house...
Regarding the question about microbial contamination that was raised earlier—where it could possibly come from—that remains unanswered and is something I’m really interested in as well [emoji4]
...the ventilation system in a house is just as complex—or as simple—as the one in a car.
Only this is established and accepted by everyone!
Here, I also set the temperature; in our case, it is 22°C (72°F) year-round, and I don’t increase it. The workshop changes the filters at regular intervals, and that’s all there is to it.
Why people resist this so much in house construction is beyond my understanding...
Only this is established and accepted by everyone!
Here, I also set the temperature; in our case, it is 22°C (72°F) year-round, and I don’t increase it. The workshop changes the filters at regular intervals, and that’s all there is to it.
Why people resist this so much in house construction is beyond my understanding...
Savings can be very individual. Just as a suggestion: the time I save by not having to ventilate myself is available to me as free time and provides me with a lot of tangible comfort – for me, practically priceless, so the maximum savings effect.
Also: 2 people, both working full-time -> no chance to ensure the minimum air exchange by manual ventilation. Savings effect: no worries about mold thanks to controlled residential ventilation, so in case of damage, it CAN pay off very quickly.
For us, therefore, priorities are mold protection and comfort... energy recovery is actually not our motivation, but we accept it because without it, the system would be somehow incomplete for us...
Also: 2 people, both working full-time -> no chance to ensure the minimum air exchange by manual ventilation. Savings effect: no worries about mold thanks to controlled residential ventilation, so in case of damage, it CAN pay off very quickly.
For us, therefore, priorities are mold protection and comfort... energy recovery is actually not our motivation, but we accept it because without it, the system would be somehow incomplete for us...
B
Bau-Schmidt4 Sep 2017 05:43Hmm.... building and saving money. Maybe some people would be better off not doing it. Building...
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