Hello,
we would like to build a one-and-a-half-story single-family house with about 125 sqm (1,345 sq ft) plus additional development space in the attic. Without a basement but with a 9 m (30 ft) garage.
We have a plot of land in sight, which we hope to reserve by May. We have already had several appointments with construction companies, including TaC, a developer from Krefeld, and one from Sonsbeck. I feel increasingly uncertain. Both developers offer roughly the same concept, but their prices differ significantly. One says that a ventilation system is not necessary for a KfW 55 solid construction house, while the other says it is very important. I am completely confused. Intuitively, the developer from Sonsbeck was our favorite—until we saw the cost estimate.
It is just too expensive! With TaC, the costs are within our budget, but opinions about the company are mixed.
Does anyone have experience in the NRW area?
Best regards
we would like to build a one-and-a-half-story single-family house with about 125 sqm (1,345 sq ft) plus additional development space in the attic. Without a basement but with a 9 m (30 ft) garage.
We have a plot of land in sight, which we hope to reserve by May. We have already had several appointments with construction companies, including TaC, a developer from Krefeld, and one from Sonsbeck. I feel increasingly uncertain. Both developers offer roughly the same concept, but their prices differ significantly. One says that a ventilation system is not necessary for a KfW 55 solid construction house, while the other says it is very important. I am completely confused. Intuitively, the developer from Sonsbeck was our favorite—until we saw the cost estimate.
It is just too expensive! With TaC, the costs are within our budget, but opinions about the company are mixed.
Does anyone have experience in the NRW area?
Best regards
To those opposing or doubting controlled residential ventilation systems:
Get into a car and turn off the air conditioning. Within 10 minutes, you will understand how it feels to stay in your home for an extended period without ventilation—whether manual or through a controlled residential ventilation system.
When you then have to open the windows to get fresh air, you have reached the point where it makes sense to consider how much heating energy you are sending outside instead of keeping the windows closed and still getting fresh air. The air inside a car is, of course, depleted much faster than in a house; it takes a few days in a home before you start feeling uncomfortable.
Those who nowadays choose not to use air conditioning in their car often do not notice this difference and struggle to breathe on longer trips. For short trips, this effect is less noticeable since opening the door quickly lets fresh air in.
Best regards in brief
Get into a car and turn off the air conditioning. Within 10 minutes, you will understand how it feels to stay in your home for an extended period without ventilation—whether manual or through a controlled residential ventilation system.
When you then have to open the windows to get fresh air, you have reached the point where it makes sense to consider how much heating energy you are sending outside instead of keeping the windows closed and still getting fresh air. The air inside a car is, of course, depleted much faster than in a house; it takes a few days in a home before you start feeling uncomfortable.
Those who nowadays choose not to use air conditioning in their car often do not notice this difference and struggle to breathe on longer trips. For short trips, this effect is less noticeable since opening the door quickly lets fresh air in.
Best regards in brief
No, the trickle vents are the crank windows at the back. You have to open them up again every six months because they tend to sag a bit over time.
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A power consumption of 100W is quite high. If you look at the datasheets, in a single-family home on normal operating levels, around 50W is more typical. However, this largely depends on proper sizing and the pressure loss, for example, caused by dense filters.
Economically, it is probably not viable. With a purchase cost of over €10,000, it is not worth trying to offset the operating costs.
Still want it
Economically, it is probably not viable. With a purchase cost of over €10,000, it is not worth trying to offset the operating costs.
Still want it
Hello,
I have to admit that I only estimated the 100 W value, as I haven’t yet had a chance to measure it with a meter. I will do that as soon as possible. Our mechanical ventilation with heat recovery is rated at about 175 watts at full load, and it usually runs at roughly two-thirds capacity. (350 m³/h (210 cfm) is max airflow; we typically run about 220 m³/h (130 cfm)).
But that doesn’t really matter—even at 50 watts power consumption, the mechanical ventilation doesn’t exactly “pay for itself.” That’s not the point though. It’s about comfort, protection against pollen for hay fever sufferers, and maintaining a pleasant indoor climate without constantly having to keep windows open.
Best regards,
Andreas
Alex85 schrieb:
100W power consumption is already quite high.
I have to admit that I only estimated the 100 W value, as I haven’t yet had a chance to measure it with a meter. I will do that as soon as possible. Our mechanical ventilation with heat recovery is rated at about 175 watts at full load, and it usually runs at roughly two-thirds capacity. (350 m³/h (210 cfm) is max airflow; we typically run about 220 m³/h (130 cfm)).
But that doesn’t really matter—even at 50 watts power consumption, the mechanical ventilation doesn’t exactly “pay for itself.” That’s not the point though. It’s about comfort, protection against pollen for hay fever sufferers, and maintaining a pleasant indoor climate without constantly having to keep windows open.
Best regards,
Andreas
C
Caspar20203 May 2017 15:41andimann schrieb:
But it doesn’t matter, even with a consumption of 50 watts, the mechanical ventilation with heat recovery is not cost-effective.Why not? It is a mechanical ventilation system with heat recovery, right?
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