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
Radfahrer schrieb:
I have been considering installing a mechanical ventilation system with heat recovery for some time now.
However, I think saving money with it is out of the question.
Costs for maintenance, filter replacement, cleaning, and electricity consumption probably leave no room for savings.
At least in our relatively warm region with a standard outdoor temperature of -11°C (12°F).
I consider it problematic to install the air ducts in a way that you can never access them again.
Retrofitting the mechanical ventilation system should be possible here with almost no additional effort. You are absolutely right in my opinion. I roughly calculated it for myself, and just the filters I replace annually cost about three times more than the amount of energy saved.
Mechanical ventilation with heat recovery is a comfort (luxury) that one can afford or choose to have. I also believe that with mechanical ventilation, possible problems with tenants can be avoided (not everyone knows how to ventilate properly, especially since no one is present for 10-12 hours).
However, this more likely falls into the category of “buying improved quality of life with money.”
Has anyone seriously claimed that you would actually save money with it?
K
KarstenausNRW17 Dec 2023 17:16i_b_n_a_n schrieb:
You are absolutely right about mEA. I did a rough calculation for myself, and the filters I replace annually alone cost three times more than the energy savings. It depends on the mechanical ventilation with heat recovery system. My last Vallox (central) and currently RLS (decentral) systems didn’t cost even €5 (about $5) per year for filters. I could buy and cut these filters myself as mats.
i_b_n_a_n schrieb:
Mechanical ventilation with heat recovery is a comfort (luxury) that you may want or be able to afford. I also believe that with such a system, landlords can avoid potential problems with tenants (not everyone knows how to ventilate properly, possibly because no one is home for 10-12 hours).
However, this falls more into the category of "improving quality of life with additional investment." Fully agree!
Radfahrer schrieb:
I consider it problematic to install the air ducts in a way that they can never be accessed again.
Retrofitting the controlled residential ventilation system should be almost effortless in our case. How exactly would that work then? Only with suspended ceilings, which 100% of the single-family homes I know do not have.
OWLer schrieb:
How exactly does that work? Only with suspended ceilings, which, as far as I know, are not present in 100% of single-family houses. Our mechanical ventilation ducts are almost 100% installed in the floor. That means I would have to tear up my floor.
And I don’t like that (it’s already inconvenient for me, but manageable because I have parquet on cross-beam joists; in the other residential units, however, the ducts are under screed).
But why reversible? It’s not reversible for electricity, water, etc., either, is it?
R
Radfahrer17 Dec 2023 19:44Maybe I am being a bit overly cautious.
Ventilation systems can also become breeding grounds for germs. That's why I would like to access the ventilation ducts again without a major renovation.
I don't have a ceiling or roof that serves as the ceiling.
The hallway, corridor, bathrooms, and guest WC have suspended ceilings.
Above the hallway/corridor ceiling, I can run ventilation ducts into every room.
Ventilation systems can also become breeding grounds for germs. That's why I would like to access the ventilation ducts again without a major renovation.
I don't have a ceiling or roof that serves as the ceiling.
The hallway, corridor, bathrooms, and guest WC have suspended ceilings.
Above the hallway/corridor ceiling, I can run ventilation ducts into every room.
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