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?
I am also in favor of a mechanical ventilation system with heat recovery. I have just shared some opinions from my circle of acquaintances. Kitchens costing €20,000 or more are installed, but you rarely see a mechanical ventilation system...
Consistently good air quality is a luxury. And it’s something you can definitely afford to invest in for your own new home, which you will live in for 30+ years.
Consistently good air quality is a luxury. And it’s something you can definitely afford to invest in for your own new home, which you will live in for 30+ years.
I have had a mechanical ventilation system with heat recovery for three years now, and the comfort it provides is unbeatable. Maintenance is very minimal, and it saves a lot of time that would otherwise be spent airing out the rooms. I also inspected the ducts recently, and they still look as good as new. Since the air is filtered, there is less dust in the house, which is especially beneficial for allergy sufferers. Even at night, in complete silence, you can’t hear the system running. I have heard different reports about decentralized systems, especially in bedrooms. Also, during wind, storms, and noisy conditions in the neighborhood or surroundings, a central system proves advantageous as it significantly reduces outside noise, which is not the case with window vents, other openings, or decentralized units. I don’t accept the argument that “it was fine before”—back then, the requirements for airtightness were different, so drafts near windows often occurred even when they were closed.
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