ᐅ Controlled residential ventilation / DIBt-certified stove / pressure monitor
Created on: 16 Jul 2013 09:23
P
PhoenixDH
Hello everyone,
we are planning to build a prefabricated house meeting the KfW 70 standard.
The house will be heated primarily with a gas/solar (water) system, partly with underfloor heating and partly with conventional radiators.
In addition, a controlled residential ventilation system with heat recovery will be integrated.
We also want to install a stove, since the heat from a stove has a different character.
I am familiar with the technical requirements from my chimney sweep.
This means the stove must be room-air independent and ideally certified by DIBt.
However, as is often the case, the stove we have chosen is room-air independent but does not have DIBt certification.
According to my information, a pressure monitor must then be installed, which shuts off the controlled ventilation system if the negative pressure becomes too high.
My question now is: what does such a pressure monitor look like and how is it installed?
Where does it measure? I assume in the room where the stove is located, but where else?
Does it measure outside? If so, how can I route the sensor outside?
Retrofitting a penetration to the outside later would be problematic due to airtightness concerns.
Can someone bring me up to date on this?
By the way: the range hood will be recirculating and can be disregarded.
Thank you very much!
we are planning to build a prefabricated house meeting the KfW 70 standard.
The house will be heated primarily with a gas/solar (water) system, partly with underfloor heating and partly with conventional radiators.
In addition, a controlled residential ventilation system with heat recovery will be integrated.
We also want to install a stove, since the heat from a stove has a different character.
I am familiar with the technical requirements from my chimney sweep.
This means the stove must be room-air independent and ideally certified by DIBt.
However, as is often the case, the stove we have chosen is room-air independent but does not have DIBt certification.
According to my information, a pressure monitor must then be installed, which shuts off the controlled ventilation system if the negative pressure becomes too high.
My question now is: what does such a pressure monitor look like and how is it installed?
Where does it measure? I assume in the room where the stove is located, but where else?
Does it measure outside? If so, how can I route the sensor outside?
Retrofitting a penetration to the outside later would be problematic due to airtightness concerns.
Can someone bring me up to date on this?
By the way: the range hood will be recirculating and can be disregarded.
Thank you very much!
There is an information sheet from the chimney sweep guild stating that a certified wood-burning stove does not require any additional measures. Period. In Germany, the certificate must be issued by the DIBt; not all manufacturers or sellers make this clear.
The 8 Pa (0.03 inches water column) requirement exists because the certification only applies under that negative pressure. However, since the ventilation system is adjusted, in my personal opinion, demanding this here is completely excessive.
Perhaps this serves as a hint; if necessary, there is also an arbitration board within the guild if you want to have this clarified.
The 8 Pa (0.03 inches water column) requirement exists because the certification only applies under that negative pressure. However, since the ventilation system is adjusted, in my personal opinion, demanding this here is completely excessive.
Perhaps this serves as a hint; if necessary, there is also an arbitration board within the guild if you want to have this clarified.
N
nordanney29 Aug 2014 13:28DaveS schrieb:
There is an information sheet from the chimney sweep guild. It states that a certified wood stove requires no additional measures. Period. In Germany, the certificate must be issued by the DIBt, but not all manufacturers or sellers are clear on this point.
The 8 Pascal pressure requirement comes from the certification applying only at this negative pressure. However, since the ventilation system is adjusted, in my personal opinion, requiring this is completely excessive.
Maybe this is just a suggestion; if necessary, there is also an arbitration board at the guild if you want to have that clarified. Unfortunately, that is incorrect advice. The pressure monitor is an optional requirement. The chimney sweep does not have to install it, but if he says "I want it," then that is final. Otherwise, there is no acceptance inspection.
We had the same issue on the table for months – the final acceptance took place yesterday (exhaust air heat exchanger and DiBt-certified combustion chamber, recirculation hood, and controlled residential ventilation system ===> pressure monitor, which then cost about €12,000).
Our home savings contract did not require a pressure switch, so it definitely wasn’t deemed necessary!
Since I was convinced it was needed, we now have an electrical cable hanging out by the stove in the baseboard.
I’m aware of the safety concerns, and once we have the money again, we’ll upgrade.
But a control unit on the wall isn’t exactly attractive either...
At the moment, we’re considering how to store the firewood and will likely spend the money on some kind of roofed structure or racks for the wood—also important!
Since I was convinced it was needed, we now have an electrical cable hanging out by the stove in the baseboard.
I’m aware of the safety concerns, and once we have the money again, we’ll upgrade.
But a control unit on the wall isn’t exactly attractive either...
At the moment, we’re considering how to store the firewood and will likely spend the money on some kind of roofed structure or racks for the wood—also important!
N
Nordlichtchen20 Oct 2014 15:07I’m curious to see how things will work out in our case: a wood-burning stove with certification, fresh air supply through the chimney / air-flue chimney system, controlled mechanical ventilation, and now something that is probably quite rare: a central vacuum system (located in the utility room, with piping running through the walls and ceiling, and suction outlets at both the top and bottom where an 8-meter (26 feet) suction hose can be connected) that is actually used almost daily, drawing air from inside the house and exhausting it outside.
However, we do have a constant fresh air supply because the utility room’s side entrance door has a cat flap, which obviously isn’t airtight (and would not be expected to be, given its cost of about 1000 euros). This won’t be much of an issue though, since the flap could simply be removed and replaced with a solid panel if there are no more cats in the house.
We did not mention the central vacuum system ourselves (we only realized afterward that it might be a relevant factor).
As a precaution, wiring was installed in the wall during construction in case a pressure switch becomes necessary.
However, we do have a constant fresh air supply because the utility room’s side entrance door has a cat flap, which obviously isn’t airtight (and would not be expected to be, given its cost of about 1000 euros). This won’t be much of an issue though, since the flap could simply be removed and replaced with a solid panel if there are no more cats in the house.
We did not mention the central vacuum system ourselves (we only realized afterward that it might be a relevant factor).
As a precaution, wiring was installed in the wall during construction in case a pressure switch becomes necessary.
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