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:
That is exactly our system. The simple solution. It should work as well.What exactly did you install there?We have reserved the plot and I have an appointment with the developer next Tuesday before the planning phase.
The plot is 680 m² (7,300 sq ft) and we will build a bungalow there.
A federal highway is located 400 m (440 yards) away with a speed limit of 100 km/h (62 mph), and a railway line is 100 m (110 yards) away where trains run at 40–50 km/h (25–31 mph) due to a nearby station. Both are to the west. A noise barrier has been installed. I even spent a considerable amount of time there with my family to decide if the noise is acceptable. It actually is, except when there is a west wind.
Therefore, I would like to have a ventilation system with supply and exhaust air, a pollen filter, and noise insulation is also important. However, I am against transporting fresh air through the ducts.
The plot is 680 m² (7,300 sq ft) and we will build a bungalow there.
A federal highway is located 400 m (440 yards) away with a speed limit of 100 km/h (62 mph), and a railway line is 100 m (110 yards) away where trains run at 40–50 km/h (25–31 mph) due to a nearby station. Both are to the west. A noise barrier has been installed. I even spent a considerable amount of time there with my family to decide if the noise is acceptable. It actually is, except when there is a west wind.
Therefore, I would like to have a ventilation system with supply and exhaust air, a pollen filter, and noise insulation is also important. However, I am against transporting fresh air through the ducts.
...I don’t want to start a debate, but the energy standard someone chooses for their building is more about their attitude towards the environment than about payback time.
If payback time were the deciding factor, no one would buy a car, because they never really pay for themselves; sure, you can justify the expense, but that’s about it.
We are building a passive house, and the investment might pay off in 20 years or it might not; either way, I don’t mind because our construction method is very sustainable.
Regarding the ventilation system: if installed, it should include heat recovery; I don’t really understand why anyone would deliberately make airtight windows or walls leaky again...
If payback time were the deciding factor, no one would buy a car, because they never really pay for themselves; sure, you can justify the expense, but that’s about it.
We are building a passive house, and the investment might pay off in 20 years or it might not; either way, I don’t mind because our construction method is very sustainable.
Regarding the ventilation system: if installed, it should include heat recovery; I don’t really understand why anyone would deliberately make airtight windows or walls leaky again...