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!
P
PhoenixDH13 Jan 2014 07:31Gives Hope
I also planned a conduit from the stove to the mechanical ventilation system—better safe than sorry.
In our case, it will be an external chimney, but that doesn’t really matter.
I also planned a conduit from the stove to the mechanical ventilation system—better safe than sorry.
In our case, it will be an external chimney, but that doesn’t really matter.
0
000pavel00014 Jan 2014 19:33wadi1982 schrieb:
So either install a pressure switch or an intrinsically safe mechanical ventilation system with heat recovery.
Since the mechanical ventilation system installed in our house is intrinsically safe, we were able to do without the pressure switch. Hello Michael,
may I ask which mechanical ventilation system with heat recovery you had installed in your house? Are you satisfied with your ventilation system?
Regards,
Pavel
Hello,
I’d like to revisit this topic.
I have a single-family house built in 1955, which I made airtight in 2009 by installing new windows, vapor barriers, and insulation. To prevent mold growth, I installed a mechanical ventilation system with heat recovery (Helios controlled mechanical ventilation EC 450 Pro).
Now I treated myself to the luxury of a wood-burning stove. After discussions with several stove installers, it was clear that I needed a certified room-air-independent (RHI) stove. So I willingly spent an extra 500 euros and now have a hard-to-access ash drawer – but that’s not a big deal.
The problem now is the chimney sweep, who demands a pressure monitor despite the stove being RHI-certified. Although I have letters from the Association of Chimney Sweeps and the German Institute for Construction Engineering (DIBt) stating that additional safety measures are excessive for certified RHI stoves, the chimney sweep insists on a certificate proving that the mechanical ventilation system cannot create more than 8 Pa.
However, the system manufacturer and the ventilation company cannot provide such a confirmation. This makes sense because if the system is running at its highest level and the supply air fan fails, the 8 Pa limit could likely be exceeded.
I do not want to install a pressure monitor because it would mean breaking open walls to lay cables, cost about 1000 euros, have an unattractive control panel in the living room, and, after all, why would I have bought a room-air-independent system?
Moreover, the pressure monitor is not a 100% guarantee either. What if there is negative pressure below the activation threshold (4 Pa), and the stove door is slightly open, for example, due to a piece of wood?
Wouldn’t it make much more sense to install a carbon monoxide (CO) detector?
These devices sound an alarm only when there is a real problem, run on batteries, are easy to install anywhere, perform self-checks, and cost only a fraction of the price.
Best regards from Duisburg
Michael
I’d like to revisit this topic.
I have a single-family house built in 1955, which I made airtight in 2009 by installing new windows, vapor barriers, and insulation. To prevent mold growth, I installed a mechanical ventilation system with heat recovery (Helios controlled mechanical ventilation EC 450 Pro).
Now I treated myself to the luxury of a wood-burning stove. After discussions with several stove installers, it was clear that I needed a certified room-air-independent (RHI) stove. So I willingly spent an extra 500 euros and now have a hard-to-access ash drawer – but that’s not a big deal.
The problem now is the chimney sweep, who demands a pressure monitor despite the stove being RHI-certified. Although I have letters from the Association of Chimney Sweeps and the German Institute for Construction Engineering (DIBt) stating that additional safety measures are excessive for certified RHI stoves, the chimney sweep insists on a certificate proving that the mechanical ventilation system cannot create more than 8 Pa.
However, the system manufacturer and the ventilation company cannot provide such a confirmation. This makes sense because if the system is running at its highest level and the supply air fan fails, the 8 Pa limit could likely be exceeded.
I do not want to install a pressure monitor because it would mean breaking open walls to lay cables, cost about 1000 euros, have an unattractive control panel in the living room, and, after all, why would I have bought a room-air-independent system?
Moreover, the pressure monitor is not a 100% guarantee either. What if there is negative pressure below the activation threshold (4 Pa), and the stove door is slightly open, for example, due to a piece of wood?
Wouldn’t it make much more sense to install a carbon monoxide (CO) detector?
These devices sound an alarm only when there is a real problem, run on batteries, are easy to install anywhere, perform self-checks, and cost only a fraction of the price.
Best regards from Duisburg
Michael
motte2 schrieb:
Wouldn’t it make much more sense to install a CO detector? These devices sound an alarm only when there is a real problem, are battery-powered, easy to mount anywhere, have a self-test function, and cost just a fraction.
Greetings from Duisburg
MichaelUnfortunately, only your local chimney sweep can answer this question for you. He and only he approves or rejects it. If he requires a pressure monitor, you will unfortunately have to accept it.
Before purchasing the stove, we discussed the available options with the chimney sweep and, with a room-sealed stove and controlled residential ventilation, we are fine without a pressure monitor.
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