Electricity consumption at home, what is your consumption?

2020-10-07 11:52:41

It is getting warmer and therefore the controlled residential ventilation becomes less efficient.

No, that is not the case. What should change about the efficiency? As soon as it gets cooler outside, and by that I mean below 20°C, which is most of the time during the winter months and partly also in autumn and spring, the controlled residential ventilation works with the same values. It recovers about 90-95% of the energy. The heat exchanger does not change; it does not get bigger or smaller. No matter how warm or cold it is outside. Actually, the temperatures in Germany are perfect for heat recovery in a controlled residential ventilation system.

The fact is:

The controlled residential ventilation ensures fresh air throughout the entire house at all times. This is simply not achievable with manual ventilation unless you have personnel who take care of it.

Because you are not at home all the time, you sometimes sleep, and sometimes people visit; who wants to run around opening windows then? And don’t tell me you do it beforehand, etc. That applies to a very small percentage.

It would be more up-to-date to ventilate manually rather than install a controlled residential ventilation system so that it’s done automatically and additionally consumes electricity/pollutes the environment.

No, exactly not. Thanks to heat recovery, the controlled residential ventilation saves energy that would otherwise be lost through open windows. The electricity consumption is almost negligible in comparison. A typical controlled residential ventilation system consumes as much as a 60W incandescent bulb. That is about €25 per year.

It is up-to-date to reuse energy and not to ventilate it out the window. Because ventilation is necessary at all times, a controlled residential ventilation system is at the forefront when it comes to environmental aspects.

2020-10-07 11:59:21

No, that is not the case. What should change about the efficiency? As soon as it gets cooler outside, and by that I mean below 20°, which is most of the time during the winter months and partly also autumn and spring. Then the controlled residential ventilation works with the same values. It recovers about 90-95% of the energy. The heat exchanger does not change; it does not get bigger or smaller. No matter how warm or cold it is outside. Actually, it is even the case that the temperatures in Germany are perfect for the heat recovery of a controlled residential ventilation system.

The fact is:

The controlled residential ventilation provides fresh air throughout the whole house continuously. That is simply not achievable with manual ventilation, unless you have staff who take care of it.

Because you are not at home all the time, you also sleep sometimes and sometimes people are visiting; who wants to run around and open windows then? And don’t tell me you do that before, etc., that applies to a very small percentage.

No, exactly not. Through heat recovery, the controlled residential ventilation saves energy that would otherwise have been vented out the window. The electricity consumption is almost negligible in comparison. A typical controlled residential ventilation system uses as much as a 60W incandescent bulb. That means about 25 euros per year.

It is contemporary to reuse energy rather than ventilate it out the window. Because you still have to ventilate at all times, a controlled residential ventilation system is at the forefront when it comes to environmental aspects.

Just like Tesla. Although the production of an electric car is rarely included in the environmental balance. You must not only count the commissioning of the controlled residential ventilation in the environmental statistics, but also the production/installation etc.

As already mentioned. A luxury you can have, but don’t have to.

2020-10-07 12:07:05

No, exactly not. Through heat recovery, the controlled residential ventilation saves energy that would otherwise be ventilated out the window. The power consumption is almost negligible by comparison. A typical controlled residential ventilation consumes as much as a 60W incandescent bulb. That is about ~25 euros per year.

It is modern to reuse energy rather than ventilate it out the window. Because you still have to ventilate at all times, controlled residential ventilation is at the forefront when it comes to environmental aspects.

We spent almost 10 years in a house without controlled residential ventilation, and for me, that was one of the main reasons for a new build. There is nothing more frustrating than the desperate attempt, as a person in full employment, to properly ventilate an entire two-story house. I miserably failed at that for years. Therefore, the whole fuss about the controlled residential ventilation story is baffling to me. Especially this “but it consumes energy!!1elf” argument completely ignores the heat recovery, which is really high in modern controlled residential ventilation.
We are currently seeing in monitoring what our air-to-water heat pump + controlled residential ventilation alone consumes, as we have not yet moved in and nothing else is running apart from the system. The baseline noise amounts to 140-148 watts. I find that reasonable, considering that I don’t have to constantly reheat what I have let out the window.

2020-10-07 12:15:43

A typical controlled residential ventilation system consumes as much as a 60W incandescent bulb. That is about ~25 euros per year.

plus 1-4 filters from the manufacturer,
plus the popular maintenance contract for heating and controlled residential ventilation
plus cleaning of the duct system every 5-10 years

2020-10-07 12:16:39

You must not only count the commissioning of the controlled residential ventilation towards environmental statistics, but also the manufacturing/installation etc.

Says the one who slaps lead and cadmium photovoltaics on the roof. How will these and other highly toxic materials of your photovoltaics be disposed of and recycled in an environmentally friendly way in 25-30 years?

2020-10-07 12:17:39

Just like Tesla. Although the construction of an electric car is rarely included in the environmental balance. You must not only count the commissioning of the [Kontrollierte-Wohnraumlüftung] in the environmental statistics, but also the manufacturing/installation etc.

I wish people would deal with one or the other topic a bit before spouting off barroom slogans.

plus 1-4 filters from the manufacturer,

No, those are available as fabric by the meter from the roll. Anyone who voluntarily puts themselves into a vendor lock-in has only themselves to blame.

plus the popular maintenance contract for heating and [Kontrollierte-Wohnraumlüftung]

The [Kontrollierte-Wohnraumlüftung] add-on is absolutely optional here and anyone who doesn’t have “two left hands” can change the filters and rinse the heat exchanger occasionally (max once a year). Of course, you can also skip that and pay someone to do it.

plus cleaning of the duct system every 5-10 years

Only the exhaust ducts and only if no filters were used on the valves. And rather every 10-20 years, unless you live by the highway or near an open-cast mine. But that is not the rule.

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Electricity consumption at home, what is your consumption?

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