Our construction supervisor (BU) is very honest, and we, as well as others, trust him a lot.
However, he is not a fan of ventilation systems.
Here are the prices he quoted. Are there
1. Solutions that are more integrated into the wall or similar, to avoid additional height increases, and
2. Is the price reasonable?
Total area is 187 sqm (2013 sq ft), including about 40 sqm (430 sq ft) of an extension. The rest is spread over two levels in a town villa style.
There is a ceiling opening of about 9 sqm (97 sq ft) to the first floor, which is not included in the 187 sqm (2013 sq ft).
Attached is the text from the BU.
Pluggit Avent fresh air unit with heat recovery included.
Aluminum cross counterflow heat exchanger
Including air ducts, supply and exhaust air outlets, silencers, distributor, cover grilles in standard white plastic, supply and install 14,192.58 €
Blower door test mandatory when installing ventilation system 476.00 €
Increase of total floor construction height from 14 cm (5.5 inches) to 18 cm (7 inches) on the upper floor
By adding 3 cm (1.2 inches) more styrofoam insulation 2,988.97 €
Enthalpy exchanger and summer bypass
No costs yet
However, he is not a fan of ventilation systems.
Here are the prices he quoted. Are there
1. Solutions that are more integrated into the wall or similar, to avoid additional height increases, and
2. Is the price reasonable?
Total area is 187 sqm (2013 sq ft), including about 40 sqm (430 sq ft) of an extension. The rest is spread over two levels in a town villa style.
There is a ceiling opening of about 9 sqm (97 sq ft) to the first floor, which is not included in the 187 sqm (2013 sq ft).
Attached is the text from the BU.
Pluggit Avent fresh air unit with heat recovery included.
Aluminum cross counterflow heat exchanger
Including air ducts, supply and exhaust air outlets, silencers, distributor, cover grilles in standard white plastic, supply and install 14,192.58 €
Blower door test mandatory when installing ventilation system 476.00 €
Increase of total floor construction height from 14 cm (5.5 inches) to 18 cm (7 inches) on the upper floor
By adding 3 cm (1.2 inches) more styrofoam insulation 2,988.97 €
Enthalpy exchanger and summer bypass
No costs yet
W
WilderSueden12 Dec 2023 10:28mr.xyz1 schrieb:
We have a mechanical ventilation system with heat recovery installed in our new build, and one thing I hadn’t considered before is the dry air in winter, which is not ideal for hardwood flooring (which we have almost everywhere). Otherwise, I enjoy not having to think about opening a window at all. Dry air is not a characteristic of a ventilation system. Dry air is the natural result of cold outdoor temperatures combined with regular ventilation. Anyone who manually ventilates five air changes per hour will face the same issue in winter. By the way, the same applies to those living with old, drafty windows, effectively having continuous ventilation.
H
HeimatBauer12 Dec 2023 10:37And those who have a mechanical ventilation system with heat recovery can attach a humidity sensor and actually control it based on absolute (!) humidity.
WilderSueden schrieb:
Dry air is not a characteristic of ventilation. Dry air is the logical result of cold outdoor temperatures and regular ventilation. Anyone who manually performs five air changes per hour faces the same problem in winter. By the way, the same applies to those living with old, leaky windows, which effectively means continuous ventilation. That is true, but since most people ventilate too little, few experience problems with dry air, and it is more noticeable with a mechanical ventilation system with heat recovery.
I’ve only read about half so far. Maybe someone has already mentioned this ;-)
Is DIY work possible? Then you might be able to install the ducting yourself from the air distribution units onwards. Mechanical ventilation with heat recovery isn’t rocket science. A simple guide, working carefully and quietly – done. The savings might be enough to afford a mechanical ventilation system after all.
P.S. I would never want to live without one again. I’m often away from home for long periods, so it stays empty and there’s no one to air it out. In winter, I definitely don’t want to open the windows… brrrr.
Is DIY work possible? Then you might be able to install the ducting yourself from the air distribution units onwards. Mechanical ventilation with heat recovery isn’t rocket science. A simple guide, working carefully and quietly – done. The savings might be enough to afford a mechanical ventilation system after all.
P.S. I would never want to live without one again. I’m often away from home for long periods, so it stays empty and there’s no one to air it out. In winter, I definitely don’t want to open the windows… brrrr.
Malle Zwabber schrieb:
In the end, a mechanical ventilation system with heat recovery usually does not make economic sense. For my 144m² (1550 sq ft) of living space, the annual savings amount to just €430, minus €43 for the electricity consumption of the ventilation system. So, only about €387 per year.
Since I installed the system myself, my costs were around €6,200. After about 16 years, you’ve basically paid off your €6,200, so I definitely see long-term savings here. The house will surely stand for much longer anyway. 😉
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