ᐅ District Heating KfW55 - KfW70 Costs for Ventilation and Exhaust Systems
Created on: 1 Sep 2017 21:35
Z
zizziHello 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?
District heating is good. Ecological, economical, saves your own heating system—which I don’t have, so it can’t break down on me.
Why aim for 55? To show off? For a good feeling? The label doesn’t matter, as long as it’s warm and efficient. If you end up with district heating and a calculated KfW 65.4, and you still have to spend several thousand to reach 55, forget it and use that money for a nice terrace instead. Karsten
Why aim for 55? To show off? For a good feeling? The label doesn’t matter, as long as it’s warm and efficient. If you end up with district heating and a calculated KfW 65.4, and you still have to spend several thousand to reach 55, forget it and use that money for a nice terrace instead. Karsten
zizzi schrieb:
Is it problematic if I install a ventilation system without heat recovery?No, it’s not problematic, but why go without it? It doesn’t cost much and saves quite a bit during winter...
I don't have much experience in this area, but I believe that to operate a ventilation system with heat recovery, the ducts need to be installed. Apart from the costs involved, I am concerned that after 5 or 10 years, mold and bacteria may develop inside the ducts that can never be completely cleaned.
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