为什么当我打开炉子的风扇时,我的家里会有烟味?
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When I use my stove hood I get smoke odours in my home, is that due to negative pressure and how do I fix it?
Anonymous
Dec. 11, 2017Last updated: July 29, 2020
I have a single-family house built in 1961 and it has an oil heating furnace. When I renovated my kitchen I had a stove hood installed that vents directly to the outside. But when the hood is running at the same time as the heating system I can smell smoke in the house. I suspect a return of air through the furnace chimney, does this make sense and what should I do?
Hi, first a couple of questions back to you, does your furnace have an outside air intake? And do you have a mechanical ventilation system (heat recovery ventilator or HRV)? Lack of either of those and a newly installed stove hood we suspect are at the root of the problem How backflow flue gases are caused: When you depressurize a house with ventilation fans, that deficit will need to be made up somehow. Air will enter through doors, windows and leaks in the walls. That would be the case with a home built in the 60s that has not had a major renovation to improve thermal performance and air tightness. This page here explains it well -
How to balance air pressure in a home
对于新建的非常密封的房子来说,减压是一个更大的问题,即使有通风风扇,也比运行在较低的CFM率。首先检查你的抽油烟机的换气量,根据你写的,我们怀疑它可能抽了比需要更多的空气。如今市场上的许多炉灶抽油烟机都比实际需要的更强大,每分钟可以抽1200立方英尺的空气(CFM),而在大多数情况下,150-250 CFM的抽油烟机可能就足够了。
Yours is a fairly serious situation that needs to be addressed, if you are getting flue gasses in your home there is a potentially lethal and imperceptible risk of carbon monoxide (CO) poisoning. How to remedy a problem of negative pressure: As mentioned above, make sure your furnace has an outside air intake. If the stove hood is moving 400 CFM or more, it may be necessary to have a make up air supply system installed, but first see if the flow can be reduced.
如果你还没有空调,那就安装一个合适的机械通风系统(HRV),把空气引入室内。一定要由有执照的暖通空调安装人员来完成,这样才能确保压力得到适当的平衡。如果这些设施已经到位,想另一种方式将空气带入房子时,引擎盖运行。对于容量为400cfm或更高的引擎盖,可能需要由专业人员安装与引擎盖容量相等的备用送风系统。
Until you take steps to mitigate the influx of flue gasses, we would advise you to limit the use of your stove hood, or at the very least open a window when it’s operating until you come up with a proper solution.A bit of added heat loss is insignificant compared to the health risks.