Bastelwastel
2013-08-27 23:56:41
- #1
Hello, this is my first post here in the forum,
this post is meant to provide all undecided people with practical facts!
We have been living in our new building for 2.5 years now, and since August last year I have been diligently reading the gas meter and entering the values into a table. I compared the actual consumption values with the forecasted values from the energy certificate, the result is a nice consumption statistic for the billing period 2012/2013.
About the house:
Single-family house, 2 stories with 220 sqm plus a full basement.
Basement waterproof concrete insulation?
Ground floor and upper floor masonry hollow chamber bricks, insulation 0.35 from Knauf 15 cm (the black one)
Windows triple glazed with external blinds, large window front facing SW
Heating: underfloor heating, gas condensing boiler with solar hot water and heating support
Ventilation: Paul Novus 300 (with touch display)
At the time of planning we really had to assert ourselves strongly regarding the ventilation system, because even for our architect it was uncharted territory back then. And today I can only say YES it was worth the money.
In our energy certificate created by the structural engineer, the ventilation system was not taken into account. We came to a value of 69 kWh/sqm a.
Now the billing year from E.On is "finally" over and I was able to do the evaluation.
Despite the rather long winter (April and May we consumed much more than in the energy certificate forecast) we came to a consumption value of 56 kWh/sqm a. Since the domestic hot water energy is included in this figure, the number of persons is also decisive. We live in the house with two adults and two small children.
Because I had previously installed two small electricity meters (as big as a circuit breaker) during the electrical installation, I know exactly how much the ventilation system and how much the heating and solar system with all pumps etc. have consumed.
Ventilation 323 kWh
Heating 383 kWh
About the ventilation in general it must be said: Simply brilliant!
The Novus 300 was set to normal load 60% for us and it runs every day. At night on level 1 (power 20%) and if necessary level 3 (I set it to 100%).
The comfort gain is mainly noticeable in winter.
An example:
Showered or bathed in the evening, everything is wet. What do you do when you are finished? Open the window and let in the -10 degrees cold air or just tilt it and then forget to close and in the morning you freeze on the toilet seat and the thermostat on the radiator runs full blast because of frost protection.
BUT! Not for us, because we keep the window closed and the ventilation system does the rest (then on level 2) in the morning it is not musty and everything is dry.
2nd example
We have a utility room on the ground floor with an exhaust vent and we dry the laundry there and that works very quickly thanks to the permanent air exchange and the windows remain closed (great for everyone with pollen allergy).
What I have often heard is that some people are afraid it might draft at the doors or whistle. We do not have that problem, not even at full load. With the glass doors, the frames were simply set a little higher to create the air gap. You can best demonstrate the airflow with a lighter or by standing with wet feet right at the bathroom door, then you notice something.
1 negative problem
I have supply and exhaust air through the basement light shafts to the outside ("special basement windows") actually no problem, but at the shaft with the exhaust air you can of course hear the air noise well and the terrace is also there, that annoys a little. But when we sit there in summer, we simply turn off the system or set it to level 1.
I could name many more positive examples.
If anyone has questions you can gladly contact me! I am happy if I can help.
P.S.: I am not a salesman and have absolutely NOTHING to do with the mentioned companies!
this post is meant to provide all undecided people with practical facts!
We have been living in our new building for 2.5 years now, and since August last year I have been diligently reading the gas meter and entering the values into a table. I compared the actual consumption values with the forecasted values from the energy certificate, the result is a nice consumption statistic for the billing period 2012/2013.
About the house:
Single-family house, 2 stories with 220 sqm plus a full basement.
Basement waterproof concrete insulation?
Ground floor and upper floor masonry hollow chamber bricks, insulation 0.35 from Knauf 15 cm (the black one)
Windows triple glazed with external blinds, large window front facing SW
Heating: underfloor heating, gas condensing boiler with solar hot water and heating support
Ventilation: Paul Novus 300 (with touch display)
At the time of planning we really had to assert ourselves strongly regarding the ventilation system, because even for our architect it was uncharted territory back then. And today I can only say YES it was worth the money.
In our energy certificate created by the structural engineer, the ventilation system was not taken into account. We came to a value of 69 kWh/sqm a.
Now the billing year from E.On is "finally" over and I was able to do the evaluation.
Despite the rather long winter (April and May we consumed much more than in the energy certificate forecast) we came to a consumption value of 56 kWh/sqm a. Since the domestic hot water energy is included in this figure, the number of persons is also decisive. We live in the house with two adults and two small children.
Because I had previously installed two small electricity meters (as big as a circuit breaker) during the electrical installation, I know exactly how much the ventilation system and how much the heating and solar system with all pumps etc. have consumed.
Ventilation 323 kWh
Heating 383 kWh
About the ventilation in general it must be said: Simply brilliant!
The Novus 300 was set to normal load 60% for us and it runs every day. At night on level 1 (power 20%) and if necessary level 3 (I set it to 100%).
The comfort gain is mainly noticeable in winter.
An example:
Showered or bathed in the evening, everything is wet. What do you do when you are finished? Open the window and let in the -10 degrees cold air or just tilt it and then forget to close and in the morning you freeze on the toilet seat and the thermostat on the radiator runs full blast because of frost protection.
BUT! Not for us, because we keep the window closed and the ventilation system does the rest (then on level 2) in the morning it is not musty and everything is dry.
2nd example
We have a utility room on the ground floor with an exhaust vent and we dry the laundry there and that works very quickly thanks to the permanent air exchange and the windows remain closed (great for everyone with pollen allergy).
What I have often heard is that some people are afraid it might draft at the doors or whistle. We do not have that problem, not even at full load. With the glass doors, the frames were simply set a little higher to create the air gap. You can best demonstrate the airflow with a lighter or by standing with wet feet right at the bathroom door, then you notice something.
1 negative problem
I have supply and exhaust air through the basement light shafts to the outside ("special basement windows") actually no problem, but at the shaft with the exhaust air you can of course hear the air noise well and the terrace is also there, that annoys a little. But when we sit there in summer, we simply turn off the system or set it to level 1.
I could name many more positive examples.
If anyone has questions you can gladly contact me! I am happy if I can help.
P.S.: I am not a salesman and have absolutely NOTHING to do with the mentioned companies!